./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/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_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/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_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/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 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- 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 02:19:03,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:19:03,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:19:03,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:19:03,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:19:03,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:19:03,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:19:03,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:19:03,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:19:03,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:19:03,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:19:03,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:19:03,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:19:03,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:19:03,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:19:03,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:19:03,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:19:03,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:19:03,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:19:03,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:19:03,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:19:03,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:19:03,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:19:03,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:19:03,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:19:03,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:19:03,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:19:03,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:19:03,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:19:03,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:19:03,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:19:03,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:19:03,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:19:03,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:19:03,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:19:03,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:19:03,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:19:03,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:19:03,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:19:03,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:19:03,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:19:03,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:19:03,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:19:03,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:19:03,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:19:03,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:19:03,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:19:03,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:19:03,630 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:19:03,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:19:03,630 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:19:03,631 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:19:03,631 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:19:03,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:19:03,632 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:19:03,632 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:19:03,632 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:19:03,633 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:19:03,633 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:19:03,633 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:19:03,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:19:03,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:19:03,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:19:03,635 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:19:03,635 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:19:03,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:19:03,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:19:03,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:19:03,637 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:19:03,637 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:19:03,637 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:19:03,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:19:03,638 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:19:03,638 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:19:03,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:19:03,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:19:03,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:19:03,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:19:03,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:19:03,640 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:19:03,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:19:03,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:19:03,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:19:03,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:19:03,642 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_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2022-11-22 02:19:03,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:19:03,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:19:03,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:19:03,963 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:19:03,964 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:19:03,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2022-11-22 02:19:06,954 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:19:07,219 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:19:07,219 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2022-11-22 02:19:07,225 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/data/294fc2042/4047def9215b48cda91b5cb12acf1144/FLAG72d63a070 [2022-11-22 02:19:07,238 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/data/294fc2042/4047def9215b48cda91b5cb12acf1144 [2022-11-22 02:19:07,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:19:07,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:19:07,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:19:07,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:19:07,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:19:07,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113a721d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07, skipping insertion in model container [2022-11-22 02:19:07,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:19:07,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:19:07,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:19:07,426 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:19:07,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:19:07,464 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:19:07,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07 WrapperNode [2022-11-22 02:19:07,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:19:07,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:19:07,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:19:07,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:19:07,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,503 INFO L138 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2022-11-22 02:19:07,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:19:07,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:19:07,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:19:07,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:19:07,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,524 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:19:07,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:19:07,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:19:07,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:19:07,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (1/1) ... [2022-11-22 02:19:07,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:19:07,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:07,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:19:07,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:19:07,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:19:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:19:07,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:19:07,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:19:07,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:19:07,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:19:07,689 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:19:07,691 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:19:07,950 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:19:08,039 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:19:08,039 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 02:19:08,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:19:08 BoogieIcfgContainer [2022-11-22 02:19:08,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:19:08,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:19:08,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:19:08,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:19:08,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:19:07" (1/3) ... [2022-11-22 02:19:08,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70839136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:19:08, skipping insertion in model container [2022-11-22 02:19:08,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:19:07" (2/3) ... [2022-11-22 02:19:08,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70839136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:19:08, skipping insertion in model container [2022-11-22 02:19:08,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:19:08" (3/3) ... [2022-11-22 02:19:08,051 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2022-11-22 02:19:08,071 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:19:08,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-22 02:19:08,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:19:08,122 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;@67a1e629, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:19:08,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-22 02:19:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 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 02:19:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 02:19:08,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:08,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 02:19:08,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash 4075446, now seen corresponding path program 1 times [2022-11-22 02:19:08,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:08,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703347606] [2022-11-22 02:19:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:08,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:08,344 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 02:19:08,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:08,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703347606] [2022-11-22 02:19:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703347606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:08,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:19:08,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:19:08,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130343754] [2022-11-22 02:19:08,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:08,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:19:08,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:08,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:19:08,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:19:08,383 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 02:19:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:08,446 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-22 02:19:08,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:19:08,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-22 02:19:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:08,456 INFO L225 Difference]: With dead ends: 39 [2022-11-22 02:19:08,457 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 02:19:08,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:19:08,461 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:08,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:19:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 02:19:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2022-11-22 02:19:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 2.076923076923077) internal successors, (27), 23 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 02:19:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-22 02:19:08,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2022-11-22 02:19:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:08,501 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-22 02:19:08,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 02:19:08,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-22 02:19:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 02:19:08,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:08,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 02:19:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:19:08,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash 3972391, now seen corresponding path program 1 times [2022-11-22 02:19:08,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:08,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962643107] [2022-11-22 02:19:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:08,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:08,675 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 02:19:08,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:08,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962643107] [2022-11-22 02:19:08,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962643107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:08,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:19:08,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:19:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546636281] [2022-11-22 02:19:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:08,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:19:08,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:08,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:19:08,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:19:08,680 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 02:19:08,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:08,768 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-22 02:19:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:19:08,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-22 02:19:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:08,769 INFO L225 Difference]: With dead ends: 40 [2022-11-22 02:19:08,770 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 02:19:08,770 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 02:19:08,772 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:08,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 02:19:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2022-11-22 02:19:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 2.0) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 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 02:19:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-22 02:19:08,779 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 4 [2022-11-22 02:19:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:08,779 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-22 02:19:08,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 02:19:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-22 02:19:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:19:08,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:08,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:19:08,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:19:08,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:08,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:08,782 INFO L85 PathProgramCache]: Analyzing trace with hash 123235085, now seen corresponding path program 1 times [2022-11-22 02:19:08,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:08,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812603509] [2022-11-22 02:19:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:08,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:08,917 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 02:19:08,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:08,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812603509] [2022-11-22 02:19:08,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812603509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:08,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:19:08,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:19:08,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562849214] [2022-11-22 02:19:08,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:08,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:19:08,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:08,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:19:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:19:08,920 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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 02:19:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:08,967 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-22 02:19:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:19:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 02:19:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:08,968 INFO L225 Difference]: With dead ends: 23 [2022-11-22 02:19:08,969 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 02:19:08,969 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 02:19:08,970 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 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 02:19:08,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:19:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 02:19:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-22 02:19:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-22 02:19:08,974 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2022-11-22 02:19:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:08,975 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-22 02:19:08,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 02:19:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-22 02:19:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:19:08,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:08,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:19:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:19:08,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash 123235086, now seen corresponding path program 1 times [2022-11-22 02:19:08,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:08,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440365194] [2022-11-22 02:19:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:08,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:09,105 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 02:19:09,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440365194] [2022-11-22 02:19:09,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440365194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:09,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:19:09,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:19:09,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050888207] [2022-11-22 02:19:09,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:09,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:19:09,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:09,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:19:09,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:19:09,113 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 1.0) 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 02:19:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:09,200 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-22 02:19:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:19:09,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) 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 02:19:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:09,201 INFO L225 Difference]: With dead ends: 41 [2022-11-22 02:19:09,202 INFO L226 Difference]: Without dead ends: 41 [2022-11-22 02:19:09,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:19:09,203 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:09,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 38 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-22 02:19:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2022-11-22 02:19:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 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 02:19:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-22 02:19:09,208 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2022-11-22 02:19:09,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:09,209 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-22 02:19:09,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) 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 02:19:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-22 02:19:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:19:09,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:09,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:19:09,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:19:09,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash 123237305, now seen corresponding path program 1 times [2022-11-22 02:19:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19193523] [2022-11-22 02:19:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:09,382 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 02:19:09,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19193523] [2022-11-22 02:19:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19193523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:09,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:19:09,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:19:09,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061700926] [2022-11-22 02:19:09,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:09,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:19:09,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:19:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:19:09,385 INFO L87 Difference]: Start difference. First operand 24 states and 27 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 02:19:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:09,430 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-11-22 02:19:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:19:09,431 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 02:19:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:09,431 INFO L225 Difference]: With dead ends: 25 [2022-11-22 02:19:09,431 INFO L226 Difference]: Without dead ends: 25 [2022-11-22 02:19:09,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 02:19:09,433 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:09,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:19:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-22 02:19:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-22 02:19:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 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 02:19:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-22 02:19:09,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2022-11-22 02:19:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:09,437 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-22 02:19:09,437 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 02:19:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-22 02:19:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:19:09,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:09,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:19:09,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:19:09,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash 123237306, now seen corresponding path program 1 times [2022-11-22 02:19:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:09,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177021245] [2022-11-22 02:19:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:09,596 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 02:19:09,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:09,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177021245] [2022-11-22 02:19:09,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177021245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:09,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:19:09,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:19:09,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742255765] [2022-11-22 02:19:09,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:09,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:19:09,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:19:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:19:09,599 INFO L87 Difference]: Start difference. First operand 22 states and 25 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 02:19:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:09,682 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-22 02:19:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:19:09,682 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 02:19:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:09,683 INFO L225 Difference]: With dead ends: 23 [2022-11-22 02:19:09,683 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 02:19:09,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:19:09,684 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:09,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 02:19:09,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-22 02:19:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-22 02:19:09,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2022-11-22 02:19:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:09,688 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-22 02:19:09,689 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 02:19:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-22 02:19:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:19:09,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:09,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:09,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:19:09,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash -833181196, now seen corresponding path program 1 times [2022-11-22 02:19:09,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:09,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437812544] [2022-11-22 02:19:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:09,733 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 02:19:09,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:09,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437812544] [2022-11-22 02:19:09,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437812544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:09,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241199080] [2022-11-22 02:19:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:09,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:09,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:09,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:09,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:19:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:19:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:09,896 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 02:19:09,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:09,932 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 02:19:09,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241199080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015843455] [2022-11-22 02:19:09,956 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 02:19:09,956 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:09,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:09,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:09,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:10,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:10,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:10,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:10,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:10,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:10,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:10,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:10,632 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 15 treesize of output 11 [2022-11-22 02:19:10,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:10,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:10,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:10,865 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:11,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~2#1| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:19:11,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:19:11,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:11,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-22 02:19:11,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076398217] [2022-11-22 02:19:11,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:19:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:19:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:19:11,662 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 02:19:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:11,742 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-11-22 02:19:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:19:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 8 [2022-11-22 02:19:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:11,745 INFO L225 Difference]: With dead ends: 48 [2022-11-22 02:19:11,747 INFO L226 Difference]: Without dead ends: 48 [2022-11-22 02:19:11,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:19:11,748 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:11,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-22 02:19:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-11-22 02:19:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 37 states have internal predecessors, (55), 0 states have call successors, (0), 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 02:19:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2022-11-22 02:19:11,760 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 8 [2022-11-22 02:19:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:11,760 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2022-11-22 02:19:11,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 02:19:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2022-11-22 02:19:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:19:11,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:11,762 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:11,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:11,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:11,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash -833282997, now seen corresponding path program 1 times [2022-11-22 02:19:11,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:11,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46219129] [2022-11-22 02:19:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:12,060 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 02:19:12,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:12,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46219129] [2022-11-22 02:19:12,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46219129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:12,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:19:12,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:19:12,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268980802] [2022-11-22 02:19:12,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:12,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:19:12,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:19:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:19:12,066 INFO L87 Difference]: Start difference. First operand 38 states and 55 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 02:19:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:12,102 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2022-11-22 02:19:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:19:12,103 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 8 [2022-11-22 02:19:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:12,104 INFO L225 Difference]: With dead ends: 37 [2022-11-22 02:19:12,104 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 02:19:12,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:19:12,106 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:12,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:19:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 02:19:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-22 02:19:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 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 02:19:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2022-11-22 02:19:12,121 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 8 [2022-11-22 02:19:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:12,121 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2022-11-22 02:19:12,122 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 02:19:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2022-11-22 02:19:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:19:12,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:12,122 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:12,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:19:12,123 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash -833282996, now seen corresponding path program 1 times [2022-11-22 02:19:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:12,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266394754] [2022-11-22 02:19:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:12,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:12,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:12,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266394754] [2022-11-22 02:19:12,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266394754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:12,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091540451] [2022-11-22 02:19:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:12,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:12,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:12,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:19:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:19:12,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:12,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:12,399 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:19:12,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-22 02:19:12,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:19:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:12,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:19:12,606 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-22 02:19:12,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:12,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:18,842 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:19:18,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:18,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-22 02:19:19,019 INFO L321 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2022-11-22 02:19:19,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 76 [2022-11-22 02:19:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:22,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091540451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:22,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650840757] [2022-11-22 02:19:22,538 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:19:22,538 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:22,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:22,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:22,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:22,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:22,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:22,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:19:22,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:22,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:22,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:22,885 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 15 treesize of output 11 [2022-11-22 02:19:22,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:22,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:23,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:23,054 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:24,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (not (<= (+ (* |ULTIMATE.start_foo_~i~1#1| 4) 4 |ULTIMATE.start_foo_~b#1.offset|) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_bar_#in~b#1.offset| 0) (< |ULTIMATE.start_main_~i~2#1| 100) (< |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_foo_#in~b#1.base| |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.base| |ULTIMATE.start_main_~#b~0#1.base|) (= (* (mod |ULTIMATE.start_foo_~n#1| 1073741824) 4) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|)) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (= |ULTIMATE.start_bar_~res~0#1| 0) (= (select |#valid| |ULTIMATE.start_foo_~#a~0#1.base|) 1) (= |ULTIMATE.start_foo_#in~size#1| |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_main_~i~2#1| |ULTIMATE.start_foo_#in~n#1|) (= |ULTIMATE.start_main_~i~2#1| |ULTIMATE.start_foo_#in~size#1|) (< |#StackHeapBarrier| |ULTIMATE.start_foo_~#a~0#1.base|) (= |ULTIMATE.start_bar_~i~0#1| 0) (= |ULTIMATE.start_foo_~i~1#1| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.offset| |ULTIMATE.start_foo_~b#1.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_foo_#in~n#1| |ULTIMATE.start_foo_~n#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:19:24,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:19:24,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:24,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2022-11-22 02:19:24,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777008278] [2022-11-22 02:19:24,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:24,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:19:24,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:24,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:19:24,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=344, Unknown=1, NotChecked=0, Total=420 [2022-11-22 02:19:24,298 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:24,729 INFO L93 Difference]: Finished difference Result 93 states and 132 transitions. [2022-11-22 02:19:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:19:24,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 02:19:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:24,731 INFO L225 Difference]: With dead ends: 93 [2022-11-22 02:19:24,731 INFO L226 Difference]: Without dead ends: 93 [2022-11-22 02:19:24,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=201, Invalid=668, Unknown=1, NotChecked=0, Total=870 [2022-11-22 02:19:24,733 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 299 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:24,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 10 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-22 02:19:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 52. [2022-11-22 02:19:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 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 02:19:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 76 transitions. [2022-11-22 02:19:24,738 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 76 transitions. Word has length 8 [2022-11-22 02:19:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:24,739 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 76 transitions. [2022-11-22 02:19:24,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 76 transitions. [2022-11-22 02:19:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:19:24,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:24,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-22 02:19:24,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 02:19:24,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 02:19:24,946 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash -61878166, now seen corresponding path program 1 times [2022-11-22 02:19:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:24,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113518346] [2022-11-22 02:19:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:24,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:25,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:25,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113518346] [2022-11-22 02:19:25,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113518346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197421484] [2022-11-22 02:19:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:25,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:25,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:25,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:25,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:19:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:25,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:19:25,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:25,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:25,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197421484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:25,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083788998] [2022-11-22 02:19:25,178 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:19:25,178 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:25,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:25,179 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:25,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:25,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:25,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:25,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:25,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:19:25,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:25,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:25,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:25,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:25,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:25,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:25,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:25,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:26,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1083788998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:26,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:26,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4] total 10 [2022-11-22 02:19:26,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021464653] [2022-11-22 02:19:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:19:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:19:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:19:26,352 INFO L87 Difference]: Start difference. First operand 52 states and 76 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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 02:19:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:26,641 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2022-11-22 02:19:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:19:26,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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 9 [2022-11-22 02:19:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:26,642 INFO L225 Difference]: With dead ends: 73 [2022-11-22 02:19:26,643 INFO L226 Difference]: Without dead ends: 73 [2022-11-22 02:19:26,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:19:26,643 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:26,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:19:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-22 02:19:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-11-22 02:19:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.631578947368421) internal successors, (93), 62 states have internal predecessors, (93), 0 states have call successors, (0), 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 02:19:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 93 transitions. [2022-11-22 02:19:26,650 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 93 transitions. Word has length 9 [2022-11-22 02:19:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:26,651 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 93 transitions. [2022-11-22 02:19:26,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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 02:19:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 93 transitions. [2022-11-22 02:19:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:19:26,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:26,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1] [2022-11-22 02:19:26,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 02:19:26,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:19:26,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -61875946, now seen corresponding path program 1 times [2022-11-22 02:19:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501715622] [2022-11-22 02:19:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:26,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501715622] [2022-11-22 02:19:26,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501715622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:26,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7186527] [2022-11-22 02:19:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:26,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:26,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:26,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:19:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:27,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:19:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:27,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:27,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7186527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259851121] [2022-11-22 02:19:27,085 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 02:19:27,086 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:27,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:27,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:27,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:27,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:27,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:27,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:27,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:27,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:27,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:27,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:27,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:27,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:27,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:27,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:28,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1096#(and (= |ULTIMATE.start_bar_#in~b#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (= (select |#length| |ULTIMATE.start_bar_#in~b#1.base|) (* (mod |ULTIMATE.start_foo_~n#1| 1073741824) 4)) (= |ULTIMATE.start_bar_~b#1.base| |ULTIMATE.start_bar_#in~b#1.base|) (= |ULTIMATE.start_foo_#in~b#1.base| |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_main_~#b~0#1.offset| |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_bar_#in~size#1| |ULTIMATE.start_bar_~size#1|) (= |ULTIMATE.start_foo_#in~b#1.base| |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_bar_~res~0#1| |ULTIMATE.start_bar_#res#1|) (= |ULTIMATE.start_main_#t~ret6#1| |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_bar_~res~0#1| 0) (= (select |#valid| |ULTIMATE.start_bar_#in~b#1.base|) 0) (= |ULTIMATE.start_foo_#in~size#1| |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_main_~i~2#1| |ULTIMATE.start_foo_#in~n#1|) (= |ULTIMATE.start_main_~i~2#1| |ULTIMATE.start_foo_#in~size#1|) (= |ULTIMATE.start_bar_~i~0#1| 0) (= |ULTIMATE.start_foo_~i~1#1| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.offset| |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_bar_#in~size#1| |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_bar_#in~b#1.offset| |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (< |#StackHeapBarrier| |ULTIMATE.start_bar_#in~b#1.base|) (= |ULTIMATE.start_foo_#in~n#1| |ULTIMATE.start_foo_~n#1|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_~size#1|)) (= |#NULL.base| 0))' at error location [2022-11-22 02:19:28,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:19:28,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:28,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-22 02:19:28,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556382594] [2022-11-22 02:19:28,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:28,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:19:28,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:19:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:19:28,368 INFO L87 Difference]: Start difference. First operand 63 states and 93 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:28,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:28,471 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-11-22 02:19:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:19:28,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 02:19:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:28,472 INFO L225 Difference]: With dead ends: 53 [2022-11-22 02:19:28,472 INFO L226 Difference]: Without dead ends: 53 [2022-11-22 02:19:28,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:19:28,473 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:28,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 10 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-22 02:19:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-11-22 02:19:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 51 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2022-11-22 02:19:28,478 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 9 [2022-11-22 02:19:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:28,478 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2022-11-22 02:19:28,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2022-11-22 02:19:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:19:28,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:28,479 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:28,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 02:19:28,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:28,683 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:28,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash -61969138, now seen corresponding path program 1 times [2022-11-22 02:19:28,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:28,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520477738] [2022-11-22 02:19:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:28,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520477738] [2022-11-22 02:19:28,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520477738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866071818] [2022-11-22 02:19:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:28,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:28,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:28,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:28,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:19:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:19:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:28,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:28,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:29,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866071818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:29,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287374861] [2022-11-22 02:19:29,054 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 02:19:29,054 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:29,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:29,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:29,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:29,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:29,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:29,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:29,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:29,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:29,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:29,338 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 15 treesize of output 11 [2022-11-22 02:19:29,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:29,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:29,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:29,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:30,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [287374861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:19:30,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:30,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 12 [2022-11-22 02:19:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845952110] [2022-11-22 02:19:30,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:30,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:19:30,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:19:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:19:30,494 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 02:19:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:30,659 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2022-11-22 02:19:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:19:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 9 [2022-11-22 02:19:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:30,660 INFO L225 Difference]: With dead ends: 52 [2022-11-22 02:19:30,660 INFO L226 Difference]: Without dead ends: 52 [2022-11-22 02:19:30,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:19:30,661 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:30,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 8 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:19:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-22 02:19:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-22 02:19:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 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 02:19:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2022-11-22 02:19:30,665 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 9 [2022-11-22 02:19:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:30,665 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2022-11-22 02:19:30,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 02:19:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2022-11-22 02:19:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:19:30,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:30,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:30,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:30,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:30,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:30,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:30,873 INFO L85 PathProgramCache]: Analyzing trace with hash 715809494, now seen corresponding path program 1 times [2022-11-22 02:19:30,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:30,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000140179] [2022-11-22 02:19:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:30,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:31,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000140179] [2022-11-22 02:19:31,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000140179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:31,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062536478] [2022-11-22 02:19:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:31,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:31,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:31,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:31,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:19:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:31,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:19:31,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:31,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:31,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062536478] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:31,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:19:31,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2022-11-22 02:19:31,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683585626] [2022-11-22 02:19:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:19:31,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:19:31,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:31,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:19:31,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:19:31,264 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:31,346 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2022-11-22 02:19:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:19:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:19:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:31,347 INFO L225 Difference]: With dead ends: 71 [2022-11-22 02:19:31,347 INFO L226 Difference]: Without dead ends: 71 [2022-11-22 02:19:31,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:19:31,348 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:31,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-22 02:19:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2022-11-22 02:19:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 57 states have internal predecessors, (79), 0 states have call successors, (0), 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 02:19:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2022-11-22 02:19:31,351 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 12 [2022-11-22 02:19:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:31,351 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2022-11-22 02:19:31,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2022-11-22 02:19:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:19:31,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:31,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:31,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:31,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:19:31,558 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash 715811714, now seen corresponding path program 1 times [2022-11-22 02:19:31,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:31,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503468857] [2022-11-22 02:19:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:31,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:31,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503468857] [2022-11-22 02:19:31,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503468857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219429404] [2022-11-22 02:19:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:31,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:31,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:31,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:19:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:19:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:31,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:31,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219429404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:31,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307948605] [2022-11-22 02:19:31,812 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 02:19:31,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:31,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:31,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:31,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:31,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:31,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:31,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:31,882 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:31,908 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:32,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:19:32,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:32,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:32,141 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:19:32,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:19:32,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:32,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:32,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:32,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:32,406 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:32,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:32,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:32,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:32,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:32,545 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:19:32,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:19:32,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:32,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:32,687 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:32,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:32,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:32,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:32,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:32,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:32,847 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:19:32,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:19:32,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:32,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:33,002 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:33,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:33,048 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:34,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1658#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_bar_#in~b#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (= |ULTIMATE.start_bar_~b#1.base| |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (= |ULTIMATE.start_bar_#in~size#1| |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_#t~ret6#1| |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_bar_~res~0#1| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_bar_#res#1| 0) (= (select |#valid| |ULTIMATE.start_bar_#in~b#1.base|) 0) (<= |ULTIMATE.start_bar_~size#1| |ULTIMATE.start_bar_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |ULTIMATE.start_bar_~i~0#1| 0) (= |ULTIMATE.start_bar_#in~size#1| |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_~i~1#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (= |ULTIMATE.start_bar_#in~b#1.offset| |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret6#1| 2147483647) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:19:34,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:19:34,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:34,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-22 02:19:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264067548] [2022-11-22 02:19:34,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:34,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:19:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:19:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:19:34,258 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:34,371 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-11-22 02:19:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:19:34,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:19:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:34,372 INFO L225 Difference]: With dead ends: 58 [2022-11-22 02:19:34,372 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 02:19:34,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:19:34,373 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:34,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 13 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 02:19:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-22 02:19:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 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 02:19:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-11-22 02:19:34,376 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 12 [2022-11-22 02:19:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:34,376 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-11-22 02:19:34,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-11-22 02:19:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:19:34,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:34,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:34,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:34,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:19:34,578 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash 715718522, now seen corresponding path program 1 times [2022-11-22 02:19:34,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:34,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589841491] [2022-11-22 02:19:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:34,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:34,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589841491] [2022-11-22 02:19:34,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589841491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:34,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526142285] [2022-11-22 02:19:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:34,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:34,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:34,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:34,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:19:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:34,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:19:34,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:34,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:34,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526142285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [884457466] [2022-11-22 02:19:34,826 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 02:19:34,826 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:34,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:34,827 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:34,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:34,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:34,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:34,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:34,886 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:34,909 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:34,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:19:35,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:35,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:35,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:35,103 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:19:35,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:19:35,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:35,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:35,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:35,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:35,380 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:35,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:35,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:35,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:35,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:35,515 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:19:35,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:19:35,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:35,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:35,673 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:35,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:35,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:35,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:35,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:35,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:35,818 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:19:35,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:19:35,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:35,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:36,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:36,015 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:36,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:37,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1863#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (not (<= (+ (* |ULTIMATE.start_foo_~i~1#1| 4) |ULTIMATE.start_foo_~#a~0#1.offset| 4) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:19:37,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:19:37,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:37,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-22 02:19:37,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811534417] [2022-11-22 02:19:37,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:19:37,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:19:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:19:37,084 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 02:19:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:37,241 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-22 02:19:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:19:37,242 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 12 [2022-11-22 02:19:37,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:37,243 INFO L225 Difference]: With dead ends: 56 [2022-11-22 02:19:37,243 INFO L226 Difference]: Without dead ends: 56 [2022-11-22 02:19:37,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:19:37,244 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:37,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 27 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-22 02:19:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-11-22 02:19:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 53 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:19:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-11-22 02:19:37,247 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 12 [2022-11-22 02:19:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:37,247 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-11-22 02:19:37,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 02:19:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-11-22 02:19:37,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:19:37,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:37,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:37,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 02:19:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:37,455 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash 698217207, now seen corresponding path program 1 times [2022-11-22 02:19:37,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:37,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443541951] [2022-11-22 02:19:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:37,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:37,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443541951] [2022-11-22 02:19:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443541951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102909577] [2022-11-22 02:19:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:37,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:37,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:37,550 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:37,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:19:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:19:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:37,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:37,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102909577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730705690] [2022-11-22 02:19:37,725 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:19:37,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:19:37,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:19:37,726 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:19:37,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:19:37,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:37,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:37,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:19:37,788 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:37,808 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:37,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:19:37,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:37,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:37,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:38,006 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:19:38,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:19:38,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:38,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:38,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:38,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:38,235 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:38,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:38,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:38,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:38,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:38,358 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:19:38,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:19:38,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:38,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:38,497 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:38,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:38,550 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 16 treesize of output 12 [2022-11-22 02:19:38,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:38,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:38,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:38,673 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:19:38,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:19:38,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:38,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:38,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:19:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:38,911 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 29 treesize of output 28 [2022-11-22 02:19:39,027 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:19:39,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:19:39,122 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:19:39,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:19:39,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:39,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:39,335 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:19:39,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 151 [2022-11-22 02:19:39,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:39,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:39,864 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:39,873 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:39,956 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:19:39,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:19:40,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:40,025 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:19:40,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:19:40,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:40,192 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:19:40,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 151 [2022-11-22 02:19:40,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:40,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:40,620 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:19:40,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:19:40,762 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:19:40,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:19:40,967 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:19:40,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:19:41,823 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:19:41,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:19:42,784 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-22 02:19:42,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 892 treesize of output 632 [2022-11-22 02:19:44,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:44,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:44,927 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:44,935 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:45,053 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:19:45,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:19:45,240 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:19:45,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:19:46,153 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:19:46,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 492 treesize of output 387 [2022-11-22 02:19:47,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:47,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:47,891 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:19:47,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:19:48,007 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:19:48,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:19:48,181 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:19:48,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:19:48,544 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:19:48,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:19:48,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:48,854 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:19:48,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:19:49,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:49,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:49,217 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:49,228 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:19:49,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:19:49,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:19:49,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:49,323 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:19:49,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:19:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:49,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:49,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:19:49,398 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:19:49,399 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 3 case distinctions, treesize of input 240 treesize of output 236 [2022-11-22 02:19:49,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:49,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:49,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:19:49,686 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:19:51,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2077#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= 0 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_bar_~i~0#1|) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0) (not (<= (+ (* |ULTIMATE.start_bar_~i~0#1| 4) 4 |ULTIMATE.start_bar_~b#1.offset|) (select |#length| |ULTIMATE.start_bar_~b#1.base|))))' at error location [2022-11-22 02:19:51,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:19:51,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:19:51,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-11-22 02:19:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485327758] [2022-11-22 02:19:51,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:51,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:19:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:19:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:19:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:19:51,269 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 02:19:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:51,436 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2022-11-22 02:19:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:19:51,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 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 14 [2022-11-22 02:19:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:51,437 INFO L225 Difference]: With dead ends: 56 [2022-11-22 02:19:51,437 INFO L226 Difference]: Without dead ends: 56 [2022-11-22 02:19:51,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:19:51,438 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:51,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 41 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:19:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-22 02:19:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-11-22 02:19:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 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 02:19:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-11-22 02:19:51,441 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 14 [2022-11-22 02:19:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:51,442 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-11-22 02:19:51,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 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 02:19:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-11-22 02:19:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:19:51,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:51,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:51,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:51,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:19:51,648 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:19:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:51,649 INFO L85 PathProgramCache]: Analyzing trace with hash 698219427, now seen corresponding path program 1 times [2022-11-22 02:19:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:19:51,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739990452] [2022-11-22 02:19:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:19:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:52,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:19:52,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739990452] [2022-11-22 02:19:52,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739990452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987223399] [2022-11-22 02:19:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:52,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:52,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:52,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:52,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:19:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:52,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 02:19:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:52,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:52,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:19:52,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:52,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:19:52,143 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:19:52,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 02:19:52,206 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:19:52,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 02:19:52,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:19:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:19:52,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:58,400 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:19:58,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:19:58,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2022-11-22 02:20:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:02,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987223399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944132235] [2022-11-22 02:20:02,683 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:20:02,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:20:02,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:20:02,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:20:02,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:20:02,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:02,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:20:02,747 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:02,767 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:02,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:20:02,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:02,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:02,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:02,941 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:02,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:02,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,119 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:03,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:03,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:03,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:03,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:03,241 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:03,242 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 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:03,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:03,380 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:03,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:03,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:03,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:03,525 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:03,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:03,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:03,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:20:03,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:03,700 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 24 treesize of output 23 [2022-11-22 02:20:03,813 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:03,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-22 02:20:03,907 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:03,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:04,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:04,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:04,117 INFO L321 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2022-11-22 02:20:04,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 156 [2022-11-22 02:20:04,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:04,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:04,505 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:04,514 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:04,607 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:04,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-22 02:20:04,703 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:04,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:04,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:04,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:04,860 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 02:20:04,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 182 treesize of output 146 [2022-11-22 02:20:05,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:05,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:05,297 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:20:05,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:05,433 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:20:05,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:20:05,581 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:05,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:20:05,760 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:05,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:07,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:07,542 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:07,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:07,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:07,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:08,309 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:08,316 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:08,422 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:08,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:20:08,601 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:08,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:09,401 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:20:09,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 492 treesize of output 387 [2022-11-22 02:20:10,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:10,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:10,600 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:20:10,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:10,726 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:20:10,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:20:10,918 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:10,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:11,265 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:20:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:11,699 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:20:11,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 471 treesize of output 366 [2022-11-22 02:20:12,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:12,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:12,638 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:12,647 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:12,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:12,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:12,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:12,734 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:12,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:12,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:12,834 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-22 02:20:12,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 250 [2022-11-22 02:20:12,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:13,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:13,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:20:13,199 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:20:15,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2305#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (or (and (not (= |ULTIMATE.start_bar_#res#1| 0)) (= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_#res#1|) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_90| Int)) (and (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_90|) 0) (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_90|)))) (and (= |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_bar_#res#1| 0) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_90| Int)) (and (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_90|) 0) (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_90|))))) (<= 0 (+ |ULTIMATE.start_bar_#res#1| 2147483648)) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= |ULTIMATE.start_bar_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_bar_~res~0#1| |ULTIMATE.start_bar_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_#t~ret6#1| |ULTIMATE.start_foo_#res#1|) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_bar_~i~0#1| |ULTIMATE.start_bar_~size#1|)) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret6#1| 2147483647) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:20:15,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:20:15,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:20:15,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 16 [2022-11-22 02:20:15,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523908672] [2022-11-22 02:20:15,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:15,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:20:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:20:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:20:15,072 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 02:20:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:15,767 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-11-22 02:20:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:20:15,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 14 [2022-11-22 02:20:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:15,769 INFO L225 Difference]: With dead ends: 74 [2022-11-22 02:20:15,769 INFO L226 Difference]: Without dead ends: 74 [2022-11-22 02:20:15,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:20:15,770 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:15,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 32 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:20:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-22 02:20:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-11-22 02:20:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 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 02:20:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-11-22 02:20:15,773 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 14 [2022-11-22 02:20:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:15,773 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-11-22 02:20:15,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 02:20:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-11-22 02:20:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 02:20:15,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:15,775 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-22 02:20:15,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:15,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:20:15,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:20:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:15,976 INFO L85 PathProgramCache]: Analyzing trace with hash 727674737, now seen corresponding path program 1 times [2022-11-22 02:20:15,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:15,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823542522] [2022-11-22 02:20:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:15,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:16,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:16,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823542522] [2022-11-22 02:20:16,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823542522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:16,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068782577] [2022-11-22 02:20:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:16,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:16,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:16,186 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:16,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:20:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:16,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:20:16,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:16,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:16,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:16,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068782577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:16,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15694116] [2022-11-22 02:20:16,719 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:20:16,719 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:20:16,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:20:16,719 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:20:16,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:20:16,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:16,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:16,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:20:16,779 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:16,801 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:16,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:20:16,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:16,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:16,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:16,989 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:16,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:17,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:17,195 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:17,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:17,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:17,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:17,315 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:17,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:17,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,444 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:17,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:17,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:17,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:17,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:17,577 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:17,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:17,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:17,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:20:17,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:17,790 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 29 treesize of output 28 [2022-11-22 02:20:17,893 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:17,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:20:17,984 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:17,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:18,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:18,239 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:20:18,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 303 treesize of output 222 [2022-11-22 02:20:18,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:18,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:18,624 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:18,632 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:18,717 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:18,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:18,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:18,803 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:20:18,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:18,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:18,939 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:20:18,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 192 [2022-11-22 02:20:19,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:19,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:19,322 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:20:19,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:19,425 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:20:19,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:20:19,618 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:19,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:20,016 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:20:20,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:20,528 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:20:20,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 528 treesize of output 414 [2022-11-22 02:20:21,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:21,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:21,554 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:21,562 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:21,730 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:21,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:22,382 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:20:22,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:23,190 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-22 02:20:23,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 915 treesize of output 655 [2022-11-22 02:20:24,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:24,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:25,091 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:20:25,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:25,201 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:20:25,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:20:25,307 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:25,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:20:25,482 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:25,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:26,869 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:20:26,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 925 treesize of output 667 [2022-11-22 02:20:28,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:28,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:29,875 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:29,883 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:29,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:29,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:29,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:29,963 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:29,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:30,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:30,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:30,041 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:20:30,041 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 3 case distinctions, treesize of input 240 treesize of output 236 [2022-11-22 02:20:30,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:30,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:30,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:20:30,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:20:31,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2602#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (not (<= (+ (* |ULTIMATE.start_foo_~i~1#1| 4) |ULTIMATE.start_foo_~#a~0#1.offset| 4) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:20:31,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:20:31,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:20:31,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-22 02:20:31,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218616816] [2022-11-22 02:20:31,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 02:20:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 02:20:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:20:31,809 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 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 02:20:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:32,573 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2022-11-22 02:20:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:20:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 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 21 [2022-11-22 02:20:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:32,576 INFO L225 Difference]: With dead ends: 153 [2022-11-22 02:20:32,576 INFO L226 Difference]: Without dead ends: 153 [2022-11-22 02:20:32,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:20:32,578 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 281 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:32,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 33 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:20:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-22 02:20:32,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2022-11-22 02:20:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 97 states have internal predecessors, (129), 0 states have call successors, (0), 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 02:20:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-11-22 02:20:32,589 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 21 [2022-11-22 02:20:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:32,589 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-11-22 02:20:32,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 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 02:20:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-11-22 02:20:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:20:32,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:32,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1] [2022-11-22 02:20:32,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:32,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:20:32,797 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:20:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash -696762066, now seen corresponding path program 2 times [2022-11-22 02:20:32,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717542200] [2022-11-22 02:20:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:32,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:20:32,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:32,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717542200] [2022-11-22 02:20:32,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717542200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:32,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520105952] [2022-11-22 02:20:32,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:20:32,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:32,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:32,911 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:32,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:20:33,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:20:33,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:20:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:20:33,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:20:33,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:20:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520105952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942819532] [2022-11-22 02:20:33,120 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:20:33,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:20:33,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:20:33,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:20:33,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:20:33,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:33,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:33,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:20:33,178 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:33,196 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:33,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:33,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:33,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:33,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:33,345 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:33,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:33,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:33,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:33,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:33,465 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:33,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:33,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:33,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:33,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:33,588 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:33,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:33,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:33,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:33,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:20:33,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:33,780 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 24 treesize of output 23 [2022-11-22 02:20:33,877 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:33,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-22 02:20:33,955 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:33,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:34,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:34,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:34,122 INFO L321 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2022-11-22 02:20:34,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 208 treesize of output 163 [2022-11-22 02:20:34,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:34,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:34,442 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:34,463 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:34,549 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:34,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-22 02:20:34,633 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:34,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:34,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:34,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:34,799 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 02:20:34,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 188 treesize of output 152 [2022-11-22 02:20:34,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:35,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:35,167 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:20:35,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:35,267 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:20:35,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:20:35,483 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:35,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:36,075 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:20:36,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:36,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:36,493 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:36,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:36,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:36,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:36,866 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:36,884 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:37,028 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:37,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:37,355 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:20:37,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:37,823 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:20:37,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 515 treesize of output 410 [2022-11-22 02:20:38,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:38,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:38,806 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:20:38,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:38,909 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:20:38,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:20:39,104 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:39,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:39,727 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:20:39,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:40,464 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:20:40,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 925 treesize of output 667 [2022-11-22 02:20:41,939 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 16 treesize of output 12 [2022-11-22 02:20:41,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:42,226 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:42,234 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:42,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:42,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:42,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:42,318 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:42,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:42,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:42,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:42,458 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-22 02:20:42,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 260 [2022-11-22 02:20:42,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:42,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:42,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:20:42,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:20:44,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3033#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= 0 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_bar_~i~0#1|) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0) (not (<= (+ (* |ULTIMATE.start_bar_~i~0#1| 4) 4 |ULTIMATE.start_bar_~b#1.offset|) (select |#length| |ULTIMATE.start_bar_~b#1.base|))))' at error location [2022-11-22 02:20:44,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:20:44,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:20:44,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-22 02:20:44,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403789038] [2022-11-22 02:20:44,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:44,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:20:44,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:20:44,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:20:44,521 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 02:20:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:44,918 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2022-11-22 02:20:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:20:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) Word has length 23 [2022-11-22 02:20:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:44,919 INFO L225 Difference]: With dead ends: 102 [2022-11-22 02:20:44,919 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 02:20:44,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:20:44,920 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 147 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:44,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 16 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 02:20:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-11-22 02:20:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.3478260869565217) internal successors, (124), 97 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 02:20:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2022-11-22 02:20:44,926 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 23 [2022-11-22 02:20:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:44,927 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2022-11-22 02:20:44,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 02:20:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2022-11-22 02:20:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:20:44,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:44,931 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-22 02:20:44,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:45,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:45,137 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:20:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash -784170493, now seen corresponding path program 1 times [2022-11-22 02:20:45,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:45,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816214834] [2022-11-22 02:20:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:45,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:45,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816214834] [2022-11-22 02:20:45,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816214834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162278837] [2022-11-22 02:20:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:45,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:45,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:45,265 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:45,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:20:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:45,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:20:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:45,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:45,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162278837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:45,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993642542] [2022-11-22 02:20:45,502 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:20:45,502 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:20:45,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:20:45,502 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:20:45,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:20:45,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:45,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:20:45,555 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:45,578 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:45,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:20:45,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:45,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:45,739 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:45,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:45,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:45,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:45,922 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:45,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:45,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:45,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:45,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:46,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:46,034 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:46,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:46,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:46,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:46,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:46,153 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:46,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:46,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:46,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:46,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:46,265 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:46,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:46,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:46,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:46,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:20:46,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:46,441 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 29 treesize of output 28 [2022-11-22 02:20:46,555 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:46,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:20:46,645 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:46,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:46,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:46,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:46,800 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:20:46,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 151 [2022-11-22 02:20:46,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:47,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:47,141 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:47,149 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:47,228 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:47,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:47,304 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:20:47,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:47,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:47,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:47,430 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:20:47,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 192 [2022-11-22 02:20:47,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:47,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:47,764 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:20:47,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:47,845 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:20:47,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:20:47,972 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:47,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:20:48,132 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:48,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:48,890 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:20:48,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 484 treesize of output 370 [2022-11-22 02:20:49,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:49,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:50,513 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:50,528 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:50,683 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:50,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:50,949 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:20:50,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:51,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:51,255 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:51,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:51,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:51,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:51,581 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:20:51,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:51,664 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:20:51,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:20:51,870 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:20:51,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:20:52,498 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:20:52,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:53,225 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:20:53,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 902 treesize of output 644 [2022-11-22 02:20:54,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:54,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:54,815 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:54,824 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:54,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:54,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:54,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:54,910 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:54,910 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 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:54,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:55,039 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-22 02:20:55,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 250 [2022-11-22 02:20:55,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:55,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:55,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:20:55,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:20:57,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3422#(and (not (<= (+ (* |ULTIMATE.start_foo_~i~1#1| 4) 4 |ULTIMATE.start_foo_~b#1.offset|) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (< |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_~size#1|) (or (and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= 0 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 4 (+ (* |ULTIMATE.start_foo_~i~1#1| 4) |ULTIMATE.start_foo_~#a~0#1.offset|)) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_foo_~#a~0#1.base|) 1) (<= (+ (* |ULTIMATE.start_foo_~i~1#1| 4) |ULTIMATE.start_foo_~#a~0#1.offset|) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0)) (and (< |ULTIMATE.start_main_~i~2#1| 100) (= |ULTIMATE.start_foo_#in~b#1.base| |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.base| |ULTIMATE.start_main_~#b~0#1.base|) (= (* (mod |ULTIMATE.start_foo_~n#1| 1073741824) 4) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|)) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_foo_~#a~0#1.base|) 1) (= |ULTIMATE.start_foo_#in~size#1| |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_main_~i~2#1| |ULTIMATE.start_foo_#in~n#1|) (= |ULTIMATE.start_main_~i~2#1| |ULTIMATE.start_foo_#in~size#1|) (< |#StackHeapBarrier| |ULTIMATE.start_foo_~#a~0#1.base|) (= |ULTIMATE.start_foo_~i~1#1| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.offset| |ULTIMATE.start_foo_~b#1.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_foo_#in~n#1| |ULTIMATE.start_foo_~n#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))' at error location [2022-11-22 02:20:57,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:20:57,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:20:57,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-22 02:20:57,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748123429] [2022-11-22 02:20:57,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:57,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:20:57,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:20:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:20:57,162 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 02:20:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:57,379 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2022-11-22 02:20:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:20:57,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) Word has length 23 [2022-11-22 02:20:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:57,380 INFO L225 Difference]: With dead ends: 91 [2022-11-22 02:20:57,380 INFO L226 Difference]: Without dead ends: 91 [2022-11-22 02:20:57,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:20:57,381 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:57,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 36 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-22 02:20:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-11-22 02:20:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 89 states have internal predecessors, (108), 0 states have call successors, (0), 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 02:20:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2022-11-22 02:20:57,385 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 23 [2022-11-22 02:20:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:57,385 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2022-11-22 02:20:57,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 02:20:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2022-11-22 02:20:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 02:20:57,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:57,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1] [2022-11-22 02:20:57,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:57,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:57,592 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:20:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash -808585612, now seen corresponding path program 3 times [2022-11-22 02:20:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:57,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935937396] [2022-11-22 02:20:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:20:57,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:57,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935937396] [2022-11-22 02:20:57,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935937396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:20:57,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415662029] [2022-11-22 02:20:57,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:20:57,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:57,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:57,888 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:57,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:20:57,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:20:57,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:20:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:20:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:20:58,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:20:58,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415662029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [482817645] [2022-11-22 02:20:58,189 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:20:58,189 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:20:58,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:20:58,190 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:20:58,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:20:58,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:58,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:20:58,247 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:58,269 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:58,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:20:58,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:58,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:58,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:58,441 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:58,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:58,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:58,513 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:58,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:58,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:58,579 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:58,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:58,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:58,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:58,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:58,703 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:58,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:20:58,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:58,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:58,815 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:58,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:20:58,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:58,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:20:58,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:20:58,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:58,934 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:58,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:20:58,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:59,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:59,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:20:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:59,106 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 29 treesize of output 28 [2022-11-22 02:20:59,205 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:20:59,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:20:59,285 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:59,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:59,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:59,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:59,444 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:20:59,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 197 treesize of output 161 [2022-11-22 02:20:59,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:59,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:59,758 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:59,767 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:20:59,835 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:20:59,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:20:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:59,897 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:20:59,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:20:59,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:20:59,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:00,018 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:21:00,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 151 [2022-11-22 02:21:00,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:00,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:00,316 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:21:00,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:21:00,412 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:21:00,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:21:00,576 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:00,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:00,929 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:21:00,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:01,329 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-22 02:21:01,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 438 treesize of output 331 [2022-11-22 02:21:01,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:01,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:02,015 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:02,023 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:02,103 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:21:02,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:21:02,254 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:02,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:02,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:02,939 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:02,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:03,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:03,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:03,390 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:21:03,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:21:03,493 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:21:03,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:21:03,658 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:03,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:04,283 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:21:04,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:04,997 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:21:04,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 902 treesize of output 644 [2022-11-22 02:21:06,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:06,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:06,638 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:06,646 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:06,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:06,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:06,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:06,722 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:06,722 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:06,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:06,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:06,793 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:21:06,793 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 3 case distinctions, treesize of input 240 treesize of output 236 [2022-11-22 02:21:06,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:06,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:07,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:21:07,050 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:08,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3795#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= 0 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_bar_~i~0#1|) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0) (not (<= (+ (* |ULTIMATE.start_bar_~i~0#1| 4) 4 |ULTIMATE.start_bar_~b#1.offset|) (select |#length| |ULTIMATE.start_bar_~b#1.base|))))' at error location [2022-11-22 02:21:08,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:08,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:08,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2022-11-22 02:21:08,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312073290] [2022-11-22 02:21:08,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:08,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:21:08,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:08,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:21:08,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:21:08,707 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 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 02:21:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:09,429 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2022-11-22 02:21:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:21:09,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 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 26 [2022-11-22 02:21:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:09,431 INFO L225 Difference]: With dead ends: 114 [2022-11-22 02:21:09,431 INFO L226 Difference]: Without dead ends: 114 [2022-11-22 02:21:09,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 02:21:09,432 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:09,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 9 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:21:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-22 02:21:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2022-11-22 02:21:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.25) internal successors, (100), 84 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 02:21:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2022-11-22 02:21:09,435 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 26 [2022-11-22 02:21:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:09,436 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2022-11-22 02:21:09,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 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 02:21:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2022-11-22 02:21:09,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:21:09,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:09,437 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1] [2022-11-22 02:21:09,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:09,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:09,637 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:21:09,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:09,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1161960230, now seen corresponding path program 2 times [2022-11-22 02:21:09,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:09,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171036020] [2022-11-22 02:21:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:09,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:21:09,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171036020] [2022-11-22 02:21:09,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171036020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6859805] [2022-11-22 02:21:09,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:21:09,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:09,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:09,842 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:09,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:21:09,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:21:09,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:21:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:21:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:10,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:10,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:21:10,057 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:21:10,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 02:21:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:21:10,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:13,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 67 [2022-11-22 02:21:13,712 INFO L321 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-22 02:21:13,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 78 [2022-11-22 02:21:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:21:13,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6859805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647926066] [2022-11-22 02:21:13,803 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:21:13,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:13,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:13,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:13,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:13,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:13,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:13,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:21:13,856 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:13,871 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:13,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:21:13,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:13,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:14,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:14,015 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:14,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:14,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,186 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:14,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:14,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:14,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:14,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:14,326 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:14,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:14,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:14,439 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:14,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:14,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:14,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:14,555 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:21:14,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:21:14,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:14,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:21:14,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:14,777 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 29 treesize of output 28 [2022-11-22 02:21:14,854 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:21:14,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:21:14,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:14,917 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:21:14,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:15,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:15,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:15,033 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:21:15,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 165 [2022-11-22 02:21:15,188 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 16 treesize of output 12 [2022-11-22 02:21:15,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:15,323 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:15,331 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:15,431 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:21:15,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:21:15,519 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:21:15,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:21:15,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:15,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:15,718 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:21:15,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 151 [2022-11-22 02:21:15,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:15,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:16,132 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:21:16,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:21:16,251 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:21:16,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:21:16,365 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:21:16,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:21:16,525 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:16,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:17,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:17,587 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:17,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:17,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:17,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:18,039 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:18,046 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:18,205 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:18,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:18,565 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:21:18,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:18,976 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-22 02:21:18,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 482 treesize of output 375 [2022-11-22 02:21:19,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:19,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:19,813 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:21:19,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:21:19,923 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:21:19,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:21:20,089 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:20,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:20,404 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:21:20,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:20,799 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-22 02:21:20,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 461 treesize of output 354 [2022-11-22 02:21:21,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:21,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:21,545 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:21,554 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:21,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:21,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:21,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:21,640 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:21,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:21,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:21,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:21,710 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:21:21,710 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 3 case distinctions, treesize of input 240 treesize of output 236 [2022-11-22 02:21:21,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:21,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:21,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:21:21,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:23,753 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4262#(and (not (<= (+ (* |ULTIMATE.start_foo_~i~1#1| 4) 4 |ULTIMATE.start_foo_~b#1.offset|) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (< |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_~size#1|) (or (and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= 0 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 4 (+ (* |ULTIMATE.start_foo_~i~1#1| 4) |ULTIMATE.start_foo_~#a~0#1.offset|)) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_foo_~#a~0#1.base|) 1) (<= (+ (* |ULTIMATE.start_foo_~i~1#1| 4) |ULTIMATE.start_foo_~#a~0#1.offset|) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0)) (and (< |ULTIMATE.start_main_~i~2#1| 100) (= |ULTIMATE.start_foo_#in~b#1.base| |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.base| |ULTIMATE.start_main_~#b~0#1.base|) (= (* (mod |ULTIMATE.start_foo_~n#1| 1073741824) 4) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|)) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_foo_~#a~0#1.base|) 1) (= |ULTIMATE.start_foo_#in~size#1| |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_main_~i~2#1| |ULTIMATE.start_foo_#in~n#1|) (= |ULTIMATE.start_main_~i~2#1| |ULTIMATE.start_foo_#in~size#1|) (< |#StackHeapBarrier| |ULTIMATE.start_foo_~#a~0#1.base|) (= |ULTIMATE.start_foo_~i~1#1| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.offset| |ULTIMATE.start_foo_~b#1.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_foo_#in~n#1| |ULTIMATE.start_foo_~n#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))' at error location [2022-11-22 02:21:23,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:23,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:23,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2022-11-22 02:21:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145381461] [2022-11-22 02:21:23,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:23,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:21:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:21:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:21:23,755 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:21:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:24,396 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2022-11-22 02:21:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:21:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 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 35 [2022-11-22 02:21:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:24,399 INFO L225 Difference]: With dead ends: 96 [2022-11-22 02:21:24,399 INFO L226 Difference]: Without dead ends: 96 [2022-11-22 02:21:24,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=370, Invalid=1352, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 02:21:24,401 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:24,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 14 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:21:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-22 02:21:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-11-22 02:21:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 90 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:21:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2022-11-22 02:21:24,404 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 35 [2022-11-22 02:21:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:24,404 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2022-11-22 02:21:24,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:21:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2022-11-22 02:21:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 02:21:24,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:24,406 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 3, 3, 3, 1, 1] [2022-11-22 02:21:24,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:24,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:24,611 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:21:24,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash -783625003, now seen corresponding path program 2 times [2022-11-22 02:21:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:24,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555304618] [2022-11-22 02:21:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:24,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:21:24,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:24,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555304618] [2022-11-22 02:21:24,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555304618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:24,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792710793] [2022-11-22 02:21:24,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:21:24,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:24,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:24,987 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:25,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:21:25,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 02:21:25,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:21:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:21:25,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:25,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-22 02:21:25,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-22 02:21:25,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792710793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:25,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493367122] [2022-11-22 02:21:25,611 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:21:25,611 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:25,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:25,612 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:25,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:25,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:25,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:21:25,671 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:25,691 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:25,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:25,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:25,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:25,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:25,864 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:21:25,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:21:25,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:25,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:26,007 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:26,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:26,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:26,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:26,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:26,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:26,147 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:26,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:26,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:26,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:26,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:21:26,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:26,374 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 29 treesize of output 28 [2022-11-22 02:21:26,479 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:21:26,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:21:26,571 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:21:26,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:21:26,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:26,807 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:21:26,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 285 treesize of output 195 [2022-11-22 02:21:27,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:27,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:27,208 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:27,216 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:27,292 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:21:27,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:21:27,376 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:21:27,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:21:27,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:27,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:27,561 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:21:27,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 275 treesize of output 185 [2022-11-22 02:21:27,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:27,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:27,960 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:21:27,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:21:28,062 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:21:28,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:21:28,219 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:28,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:28,793 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:21:28,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:29,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:29,115 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:29,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:29,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:29,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:29,461 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:29,469 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:29,548 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:21:29,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:21:29,704 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:29,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:30,479 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-22 02:21:30,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 495 treesize of output 379 [2022-11-22 02:21:31,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:31,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:31,636 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:21:31,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:21:31,741 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:21:31,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:21:31,915 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:31,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:32,097 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:21:32,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:32,364 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-22 02:21:32,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 208 [2022-11-22 02:21:32,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:32,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:32,848 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:32,857 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:32,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:32,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:32,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:32,939 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:21:32,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:21:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:32,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:33,046 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-22 02:21:33,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 250 [2022-11-22 02:21:33,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:33,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:33,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:21:33,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:35,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4729#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (not (<= (+ (* |ULTIMATE.start_foo_~i~1#1| 4) |ULTIMATE.start_foo_~#a~0#1.offset| 4) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:21:35,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:35,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:35,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2022-11-22 02:21:35,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409791411] [2022-11-22 02:21:35,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:35,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:21:35,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:21:35,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:21:35,079 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 17 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:36,032 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2022-11-22 02:21:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:21:36,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-22 02:21:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:36,033 INFO L225 Difference]: With dead ends: 98 [2022-11-22 02:21:36,034 INFO L226 Difference]: Without dead ends: 98 [2022-11-22 02:21:36,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:21:36,035 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:36,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 36 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:21:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-22 02:21:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-11-22 02:21:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 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 02:21:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-11-22 02:21:36,038 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 38 [2022-11-22 02:21:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:36,038 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-11-22 02:21:36,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-11-22 02:21:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:21:36,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:36,039 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-22 02:21:36,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:36,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 02:21:36,240 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:21:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1953466415, now seen corresponding path program 1 times [2022-11-22 02:21:36,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:36,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351467917] [2022-11-22 02:21:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:36,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-22 02:21:36,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:36,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351467917] [2022-11-22 02:21:36,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351467917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:36,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:36,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:21:36,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086695528] [2022-11-22 02:21:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:36,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:21:36,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:36,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:21:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:21:36,397 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 02:21:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:36,431 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-22 02:21:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:21:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 45 [2022-11-22 02:21:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:36,432 INFO L225 Difference]: With dead ends: 64 [2022-11-22 02:21:36,432 INFO L226 Difference]: Without dead ends: 64 [2022-11-22 02:21:36,432 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 02:21:36,433 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:36,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:21:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-22 02:21:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-11-22 02:21:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:21:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-11-22 02:21:36,436 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 45 [2022-11-22 02:21:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:36,437 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-11-22 02:21:36,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 02:21:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-11-22 02:21:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:21:36,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:36,439 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:36,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-22 02:21:36,439 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:21:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash 380517765, now seen corresponding path program 1 times [2022-11-22 02:21:36,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:36,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080020931] [2022-11-22 02:21:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:36,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:21:36,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080020931] [2022-11-22 02:21:36,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080020931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927044513] [2022-11-22 02:21:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:36,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:36,682 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:36,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:21:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:36,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:21:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:21:36,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:21:37,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927044513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:37,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100940120] [2022-11-22 02:21:37,019 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:21:37,019 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:37,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:37,020 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:37,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:37,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:37,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:37,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:21:37,074 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:37,448 INFO L321 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2022-11-22 02:21:37,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 501 treesize of output 500 [2022-11-22 02:21:37,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:37,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:37,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:37,603 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:21:37,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:21:37,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:37,675 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:37,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:37,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:37,746 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:37,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:37,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:21:37,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:38,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:38,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:38,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:38,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:38,088 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:21:38,089 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 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:21:38,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:38,156 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:38,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:38,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:38,222 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:38,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:38,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:21:38,417 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:39,822 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5359#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~i~2#1| 0) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_28| Int)) (and (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_28|)) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_28|) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_28|) 0) (not (= |ULTIMATE.start_main_~i~2#1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_28|) (* |ULTIMATE.start_main_~i~2#1| 4)))))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:21:39,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:39,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:39,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-11-22 02:21:39,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222721690] [2022-11-22 02:21:39,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:39,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:21:39,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:39,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:21:39,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:21:39,824 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 02:21:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:40,022 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-11-22 02:21:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:21:40,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 47 [2022-11-22 02:21:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:40,023 INFO L225 Difference]: With dead ends: 72 [2022-11-22 02:21:40,023 INFO L226 Difference]: Without dead ends: 72 [2022-11-22 02:21:40,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:21:40,024 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:40,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-22 02:21:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-11-22 02:21:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.121212121212121) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-22 02:21:40,027 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 47 [2022-11-22 02:21:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:40,027 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-22 02:21:40,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 02:21:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-22 02:21:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:21:40,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:40,028 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:40,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-22 02:21:40,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-22 02:21:40,235 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:21:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:40,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1097413063, now seen corresponding path program 2 times [2022-11-22 02:21:40,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:40,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450439501] [2022-11-22 02:21:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:40,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 02:21:40,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:40,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450439501] [2022-11-22 02:21:40,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450439501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:40,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570094770] [2022-11-22 02:21:40,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:21:40,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:40,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:40,376 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:40,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 02:21:40,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:21:40,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:21:40,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:21:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:21:40,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:21:40,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570094770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618027217] [2022-11-22 02:21:40,778 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:21:40,778 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:40,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:40,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:40,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:40,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:40,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:40,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:21:40,835 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:41,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:21:41,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:41,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:41,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:41,209 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:21:41,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:21:41,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:41,277 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:41,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:41,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:21:41,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:41,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:41,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:41,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:41,520 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:41,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:41,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:41,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:41,623 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:21:41,624 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 3 case distinctions, treesize of input 180 treesize of output 185 [2022-11-22 02:21:41,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:41,714 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:41,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:41,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:21:41,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:41,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:41,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:41,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:41,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:41,992 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:41,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:42,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:42,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:42,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:42,086 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:21:42,087 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 3 case distinctions, treesize of input 180 treesize of output 185 [2022-11-22 02:21:42,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:42,157 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:42,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:42,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:21:42,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:43,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5834#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~i~2#1| 0) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_29| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) (* |ULTIMATE.start_main_~i~2#1| 4)) |ULTIMATE.start_main_~i~2#1|)) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_29|) 0) (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_29|)) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_29|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:21:43,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:43,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:43,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 17 [2022-11-22 02:21:43,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672762295] [2022-11-22 02:21:43,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:43,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:21:43,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:21:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:21:43,582 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 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 02:21:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:44,193 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2022-11-22 02:21:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 02:21:44,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 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 50 [2022-11-22 02:21:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:44,194 INFO L225 Difference]: With dead ends: 150 [2022-11-22 02:21:44,194 INFO L226 Difference]: Without dead ends: 150 [2022-11-22 02:21:44,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 02:21:44,196 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 363 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:44,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 12 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:21:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-22 02:21:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2022-11-22 02:21:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 137 states have internal predecessors, (162), 0 states have call successors, (0), 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 02:21:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2022-11-22 02:21:44,201 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 50 [2022-11-22 02:21:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:44,201 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2022-11-22 02:21:44,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 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 02:21:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2022-11-22 02:21:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 02:21:44,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:44,203 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 5, 5, 5, 4, 1, 1] [2022-11-22 02:21:44,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-22 02:21:44,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:44,409 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:21:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:44,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1890851649, now seen corresponding path program 2 times [2022-11-22 02:21:44,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:44,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688151756] [2022-11-22 02:21:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:44,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 160 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:21:44,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:44,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688151756] [2022-11-22 02:21:44,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688151756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:44,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025196706] [2022-11-22 02:21:44,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:21:44,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:44,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:44,730 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:44,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:21:44,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:21:44,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:21:45,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:21:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 4 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-22 02:21:45,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 11 proven. 193 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-22 02:21:45,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025196706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:45,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109770082] [2022-11-22 02:21:45,434 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:21:45,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:45,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:45,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:45,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:45,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:45,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:45,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:21:45,481 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:45,502 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:45,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:21:45,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:45,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:45,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:45,651 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:21:45,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:21:45,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:45,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:45,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:45,811 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:45,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:45,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:45,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:45,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:45,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:45,925 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:45,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:45,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:45,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:46,056 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:46,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:21:46,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:46,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:21:46,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:21:46,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:46,185 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:21:46,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:21:46,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:46,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:46,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:21:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,362 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 29 treesize of output 28 [2022-11-22 02:21:46,452 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:21:46,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:21:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,549 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:21:46,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:46,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:46,670 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:21:46,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 272 treesize of output 182 [2022-11-22 02:21:46,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:46,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:46,953 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:46,962 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:47,032 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:21:47,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:21:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,107 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:21:47,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:47,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:47,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:47,218 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:21:47,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 165 [2022-11-22 02:21:47,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:47,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:47,565 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:21:47,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:21:47,671 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:21:47,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:21:47,824 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:47,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:48,149 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:21:48,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:21:48,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:48,430 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:48,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:21:48,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:48,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:48,807 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:48,815 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:21:48,909 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:21:48,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:21:49,077 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:49,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:50,429 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:21:50,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 925 treesize of output 667 [2022-11-22 02:21:54,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:54,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:57,549 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:21:57,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:21:57,652 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:21:57,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:21:57,754 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:21:57,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:21:57,922 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:21:57,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:21:59,256 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:21:59,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 902 treesize of output 644 [2022-11-22 02:22:01,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:02,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:03,235 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:03,243 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:03,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:03,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:03,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:03,323 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:22:03,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:22:03,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:03,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:03,473 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-22 02:22:03,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 250 [2022-11-22 02:22:03,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:03,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:03,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:22:03,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:22:05,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6586#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (or (and (not (= |ULTIMATE.start_bar_#res#1| 0)) (= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_#res#1|) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_190| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_190|) (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_190|) 0)))) (and (= |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_bar_#res#1| 0) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_190| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_190|) (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_190|) 0))))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 (+ |ULTIMATE.start_bar_#res#1| 2147483648)) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= |ULTIMATE.start_bar_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_bar_~res~0#1| |ULTIMATE.start_bar_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_#t~ret6#1| |ULTIMATE.start_foo_#res#1|) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_bar_~i~0#1| |ULTIMATE.start_bar_~size#1|)) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret6#1| 2147483647) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:22:05,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:22:05,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:22:05,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 23 [2022-11-22 02:22:05,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687103810] [2022-11-22 02:22:05,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:22:05,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:22:05,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:22:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:22:05,866 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 02:22:06,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:06,643 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2022-11-22 02:22:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:22:06,644 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 62 [2022-11-22 02:22:06,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:06,644 INFO L225 Difference]: With dead ends: 120 [2022-11-22 02:22:06,645 INFO L226 Difference]: Without dead ends: 120 [2022-11-22 02:22:06,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=520, Invalid=1930, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:22:06,646 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 88 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:06,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 19 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:22:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-22 02:22:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-11-22 02:22:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 116 states have internal predecessors, (132), 0 states have call successors, (0), 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 02:22:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2022-11-22 02:22:06,650 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 62 [2022-11-22 02:22:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:06,650 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2022-11-22 02:22:06,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 02:22:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2022-11-22 02:22:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 02:22:06,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:06,651 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 1, 1] [2022-11-22 02:22:06,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:22:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:06,858 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:22:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:06,859 INFO L85 PathProgramCache]: Analyzing trace with hash -679383903, now seen corresponding path program 3 times [2022-11-22 02:22:06,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:06,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265941864] [2022-11-22 02:22:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:06,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 181 proven. 88 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:22:07,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265941864] [2022-11-22 02:22:07,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265941864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484339402] [2022-11-22 02:22:07,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:22:07,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:07,147 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:07,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 02:22:07,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:22:07,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:22:07,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:22:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 181 proven. 88 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:22:07,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 181 proven. 88 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:22:07,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484339402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:22:07,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766897136] [2022-11-22 02:22:07,894 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:22:07,894 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:22:07,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:22:07,895 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:22:07,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:22:07,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:07,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:07,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:22:07,943 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:07,966 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:08,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:22:08,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:08,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:08,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:08,114 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:08,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:08,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:08,176 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:22:08,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:22:08,217 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:08,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:08,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:08,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:08,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:08,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:08,354 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:08,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:08,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:08,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:08,476 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:08,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:08,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:08,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:08,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:08,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:08,602 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:08,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:08,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:08,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:08,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:22:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:08,763 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 29 treesize of output 28 [2022-11-22 02:22:08,853 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:08,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:22:08,931 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:22:08,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:22:09,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:09,091 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:22:09,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 165 [2022-11-22 02:22:09,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:09,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:09,432 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:09,440 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:09,515 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:22:09,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:22:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:09,592 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:22:09,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:22:09,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:09,733 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:22:09,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 272 treesize of output 182 [2022-11-22 02:22:09,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:09,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:10,062 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:10,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:22:10,204 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:22:10,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:22:10,323 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:10,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:22:10,518 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:10,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:11,894 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:22:11,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 902 treesize of output 644 [2022-11-22 02:22:14,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:14,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:15,430 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:15,444 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:15,530 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:15,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:22:15,715 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:15,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:17,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:17,104 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:17,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:17,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:17,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:17,724 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:17,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:22:17,829 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:22:17,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:22:18,006 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:18,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:18,634 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:22:18,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:22:19,441 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:22:19,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 925 treesize of output 667 [2022-11-22 02:22:20,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:20,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:21,270 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:21,278 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:21,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:21,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:21,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:21,357 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:21,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:21,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:21,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:21,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:21,422 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:22:21,422 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 3 case distinctions, treesize of input 240 treesize of output 236 [2022-11-22 02:22:21,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:21,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:21,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:22:21,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:22:23,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7274#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 (+ |ULTIMATE.start_bar_#res#1| 2147483648)) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (or (and (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_205| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_205|) (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_205|) 0))) (not (= |ULTIMATE.start_bar_#res#1| 0)) (= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_#res#1|)) (and (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_205| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_205|) (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_205|) 0))) (= |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_bar_#res#1| 0))) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= |ULTIMATE.start_bar_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_bar_~res~0#1| |ULTIMATE.start_bar_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_#t~ret6#1| |ULTIMATE.start_foo_#res#1|) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_bar_~i~0#1| |ULTIMATE.start_bar_~size#1|)) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret6#1| 2147483647) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:22:23,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:22:23,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:22:23,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-11-22 02:22:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001382884] [2022-11-22 02:22:23,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:22:23,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:22:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:22:23,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:22:23,395 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 02:22:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:23,719 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2022-11-22 02:22:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:22:23,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) Word has length 66 [2022-11-22 02:22:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:23,721 INFO L225 Difference]: With dead ends: 132 [2022-11-22 02:22:23,721 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 02:22:23,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 177 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:22:23,722 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:23,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:22:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 02:22:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-11-22 02:22:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 125 states have internal predecessors, (141), 0 states have call successors, (0), 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 02:22:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2022-11-22 02:22:23,726 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 66 [2022-11-22 02:22:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:23,726 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2022-11-22 02:22:23,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 02:22:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2022-11-22 02:22:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 02:22:23,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:23,727 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 5, 5, 5, 4, 1, 1] [2022-11-22 02:22:23,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:22:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-22 02:22:23,935 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:22:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 459437885, now seen corresponding path program 4 times [2022-11-22 02:22:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148275933] [2022-11-22 02:22:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 02:22:24,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148275933] [2022-11-22 02:22:24,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148275933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50337685] [2022-11-22 02:22:24,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:22:24,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:24,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:24,309 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:24,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 02:22:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:22:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 02:22:24,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 02:22:24,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50337685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:22:24,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [897107747] [2022-11-22 02:22:24,861 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:22:24,861 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:22:24,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:22:24,862 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:22:24,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:22:24,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:24,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:24,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:22:24,925 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:24,947 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:25,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:25,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:25,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:25,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:25,122 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:25,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:25,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:25,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:25,250 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:25,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:25,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:25,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:25,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:25,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:25,436 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:25,437 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:25,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:25,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:25,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:22:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:25,656 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 29 treesize of output 28 [2022-11-22 02:22:25,745 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:22:25,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:22:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:25,816 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:22:25,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:22:25,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:25,942 INFO L321 Elim1Store]: treesize reduction 60, result has 21.1 percent of original size [2022-11-22 02:22:25,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 158 [2022-11-22 02:22:26,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:26,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:26,196 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:26,204 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:26,287 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:26,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:22:26,381 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:22:26,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:22:26,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:26,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:26,661 INFO L321 Elim1Store]: treesize reduction 62, result has 20.5 percent of original size [2022-11-22 02:22:26,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 320 treesize of output 248 [2022-11-22 02:22:26,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:26,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:27,105 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:27,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:22:27,210 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:22:27,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:22:27,372 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:27,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:27,997 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:22:27,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:22:28,723 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:22:28,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 925 treesize of output 667 [2022-11-22 02:22:30,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:30,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:30,457 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:30,464 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:30,559 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:30,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:22:30,742 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:30,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:31,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:31,454 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:31,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:31,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:31,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:31,917 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:31,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:22:32,013 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:22:32,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:22:32,126 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:32,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:22:32,288 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:32,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:33,054 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:22:33,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 505 treesize of output 391 [2022-11-22 02:22:33,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:33,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:34,103 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:34,112 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:34,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:34,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:34,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:34,185 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:22:34,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:22:34,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:34,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:34,291 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-22 02:22:34,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 260 [2022-11-22 02:22:34,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:34,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:34,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:22:34,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:22:36,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7989#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 (+ |ULTIMATE.start_bar_#res#1| 2147483648)) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (or (and (not (= |ULTIMATE.start_bar_#res#1| 0)) (= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_#res#1|) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_219| Int)) (and (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_219|) 0) (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_219|)))) (and (= |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_bar_#res#1| 0) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_219| Int)) (and (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_219|) 0) (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_219|))))) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= |ULTIMATE.start_bar_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_bar_~res~0#1| |ULTIMATE.start_bar_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_#t~ret6#1| |ULTIMATE.start_foo_#res#1|) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_bar_~i~0#1| |ULTIMATE.start_bar_~size#1|)) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret6#1| 2147483647) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:22:36,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:22:36,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:22:36,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-11-22 02:22:36,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162845038] [2022-11-22 02:22:36,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:22:36,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:22:36,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:22:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:22:36,367 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 02:22:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:36,749 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2022-11-22 02:22:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:22:36,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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) Word has length 69 [2022-11-22 02:22:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:36,751 INFO L225 Difference]: With dead ends: 132 [2022-11-22 02:22:36,751 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 02:22:36,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 185 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:22:36,752 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:36,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 70 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:22:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 02:22:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-11-22 02:22:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.125) internal successors, (144), 129 states have internal predecessors, (144), 0 states have call successors, (0), 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 02:22:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2022-11-22 02:22:36,756 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 69 [2022-11-22 02:22:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:36,756 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2022-11-22 02:22:36,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 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 02:22:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2022-11-22 02:22:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:22:36,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:36,757 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 1, 1] [2022-11-22 02:22:36,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 02:22:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 02:22:36,964 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:22:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -863894370, now seen corresponding path program 5 times [2022-11-22 02:22:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:36,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872258252] [2022-11-22 02:22:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 02:22:38,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872258252] [2022-11-22 02:22:38,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872258252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298899056] [2022-11-22 02:22:38,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:22:38,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:38,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:38,587 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:38,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 02:22:38,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 02:22:38,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:22:38,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-22 02:22:38,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:39,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:39,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:39,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:22:39,054 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:22:39,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 02:22:39,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:39,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 02:22:39,107 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:22:39,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 02:22:39,146 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:39,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-22 02:22:39,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:22:39,313 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:22:39,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 02:22:39,331 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:39,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-22 02:22:39,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:22:39,552 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:39,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-22 02:22:39,574 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-22 02:22:39,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:22:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 187 proven. 87 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-22 02:22:40,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:41,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:22:41,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-22 02:22:41,140 INFO L321 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2022-11-22 02:22:41,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 78 [2022-11-22 02:22:42,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:22:42,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-22 02:22:42,010 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 02:22:42,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-22 02:22:42,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:22:42,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2022-11-22 02:22:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 3 proven. 272 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-22 02:22:43,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298899056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:22:43,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128601496] [2022-11-22 02:22:43,440 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:22:43,440 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:22:43,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:22:43,441 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:22:43,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:22:43,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:43,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:43,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:22:43,500 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:43,521 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:43,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:22:43,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:43,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:43,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:43,691 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:22:43,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:22:43,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:43,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:43,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:43,860 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:43,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:43,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:43,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:43,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:43,976 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:22:43,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:22:44,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:44,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:44,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:22:44,088 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:44,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:44,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:44,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:44,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:44,224 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:44,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:44,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:44,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:44,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:22:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:44,399 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 24 treesize of output 23 [2022-11-22 02:22:44,481 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:44,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-22 02:22:44,557 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:22:44,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:22:44,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:44,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:44,781 INFO L321 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2022-11-22 02:22:44,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 303 treesize of output 231 [2022-11-22 02:22:44,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:45,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:45,114 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:45,122 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:45,207 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:45,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-22 02:22:45,281 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:22:45,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:22:45,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:45,476 INFO L321 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2022-11-22 02:22:45,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 277 treesize of output 187 [2022-11-22 02:22:45,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:45,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:45,849 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:45,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:22:45,957 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:22:45,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:22:46,136 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:46,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:46,754 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:22:46,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:22:47,477 INFO L321 Elim1Store]: treesize reduction 86, result has 24.6 percent of original size [2022-11-22 02:22:47,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 925 treesize of output 667 [2022-11-22 02:22:48,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:48,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:49,190 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:49,199 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:49,286 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:49,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:22:49,452 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:49,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:50,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:50,317 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:50,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:50,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:50,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:50,807 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:22:50,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:22:50,911 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:22:50,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:22:51,020 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:22:51,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:22:51,184 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:22:51,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:22:51,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:51,852 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:51,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:51,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:52,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:52,177 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:52,185 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:22:52,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:22:52,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:22:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:52,258 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:52,258 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:22:52,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:52,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:52,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:52,335 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:22:52,335 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 3 case distinctions, treesize of input 240 treesize of output 236 [2022-11-22 02:22:52,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:52,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:22:52,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:22:52,626 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:22:54,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8748#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 (+ |ULTIMATE.start_bar_#res#1| 2147483648)) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= |ULTIMATE.start_bar_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_bar_~res~0#1| |ULTIMATE.start_bar_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (= |ULTIMATE.start_main_#t~ret6#1| |ULTIMATE.start_foo_#res#1|) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (or (and (= |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_#res#1|) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_236| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_236|) (= 0 (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_236|)))) (= |ULTIMATE.start_bar_#res#1| 0)) (and (not (= |ULTIMATE.start_bar_#res#1| 0)) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_236| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_236|) (= 0 (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_236|)))) (= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_#res#1|))) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_bar_~i~0#1| |ULTIMATE.start_bar_~size#1|)) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret6#1| 2147483647) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:22:54,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:22:54,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:22:54,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 48 [2022-11-22 02:22:54,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053531059] [2022-11-22 02:22:54,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:22:54,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 02:22:54,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:54,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 02:22:54,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2684, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 02:22:54,700 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 50 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 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 02:22:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:59,954 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2022-11-22 02:22:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-22 02:22:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 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 71 [2022-11-22 02:22:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:59,955 INFO L225 Difference]: With dead ends: 191 [2022-11-22 02:22:59,955 INFO L226 Difference]: Without dead ends: 191 [2022-11-22 02:22:59,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 168 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3883 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2789, Invalid=11491, Unknown=0, NotChecked=0, Total=14280 [2022-11-22 02:22:59,958 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 703 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:59,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 10 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:22:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-22 02:22:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 169. [2022-11-22 02:22:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 168 states have internal predecessors, (190), 0 states have call successors, (0), 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 02:22:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2022-11-22 02:22:59,962 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 71 [2022-11-22 02:22:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:59,963 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2022-11-22 02:22:59,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 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 02:22:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2022-11-22 02:22:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-22 02:22:59,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:59,965 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-22 02:22:59,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:00,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:00,172 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:23:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1731239972, now seen corresponding path program 3 times [2022-11-22 02:23:00,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:00,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562902070] [2022-11-22 02:23:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:00,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 814 proven. 177 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-22 02:23:00,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:00,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562902070] [2022-11-22 02:23:00,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562902070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:00,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406205172] [2022-11-22 02:23:00,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:23:00,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:00,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:00,667 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:00,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 02:23:03,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:23:03,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:23:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:23:03,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 483 proven. 22 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2022-11-22 02:23:03,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 483 proven. 22 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2022-11-22 02:23:03,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406205172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:23:03,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061623641] [2022-11-22 02:23:03,673 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:23:03,673 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:03,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:03,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:03,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:03,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:23:03,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:03,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:23:03,729 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:23:04,095 INFO L321 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2022-11-22 02:23:04,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 501 treesize of output 500 [2022-11-22 02:23:04,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:04,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:23:04,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:04,259 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:04,259 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:04,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:04,329 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:04,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:04,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:23:04,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:23:04,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:04,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:04,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:23:04,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:04,636 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:04,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:04,700 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:04,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:04,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:23:04,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:06,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10031#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~i~2#1| 0) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_30| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 0) (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_30|)) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_30|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_30|) (* |ULTIMATE.start_main_~i~2#1| 4)) |ULTIMATE.start_main_~i~2#1|)))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:23:06,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:23:06,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:06,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-11-22 02:23:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478785746] [2022-11-22 02:23:06,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:06,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 02:23:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 02:23:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:23:06,338 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 28 states, 28 states have (on average 4.0) internal successors, (112), 28 states have internal predecessors, (112), 0 states have call successors, (0), 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 02:23:08,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:08,591 INFO L93 Difference]: Finished difference Result 284 states and 313 transitions. [2022-11-22 02:23:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-22 02:23:08,591 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.0) internal successors, (112), 28 states have internal predecessors, (112), 0 states have call successors, (0), 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 128 [2022-11-22 02:23:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:08,593 INFO L225 Difference]: With dead ends: 284 [2022-11-22 02:23:08,593 INFO L226 Difference]: Without dead ends: 284 [2022-11-22 02:23:08,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 354 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2713, Invalid=11093, Unknown=0, NotChecked=0, Total=13806 [2022-11-22 02:23:08,598 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 384 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:08,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 18 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:23:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-22 02:23:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 210. [2022-11-22 02:23:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 208 states have (on average 1.125) internal successors, (234), 209 states have internal predecessors, (234), 0 states have call successors, (0), 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 02:23:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 234 transitions. [2022-11-22 02:23:08,604 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 234 transitions. Word has length 128 [2022-11-22 02:23:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:08,605 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 234 transitions. [2022-11-22 02:23:08,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.0) internal successors, (112), 28 states have internal predecessors, (112), 0 states have call successors, (0), 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 02:23:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 234 transitions. [2022-11-22 02:23:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-22 02:23:08,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:08,607 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:08,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:08,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-22 02:23:08,817 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:23:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:08,818 INFO L85 PathProgramCache]: Analyzing trace with hash 96970084, now seen corresponding path program 4 times [2022-11-22 02:23:08,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:08,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275222605] [2022-11-22 02:23:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:08,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 822 proven. 321 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-22 02:23:09,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:09,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275222605] [2022-11-22 02:23:09,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275222605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:09,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332075631] [2022-11-22 02:23:09,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:23:09,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:09,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:09,475 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:09,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 02:23:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:09,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:23:09,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 822 proven. 321 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-22 02:23:10,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 822 proven. 321 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-22 02:23:10,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332075631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:23:10,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [443589622] [2022-11-22 02:23:10,351 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:23:10,351 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:10,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:10,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:10,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:10,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:23:10,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:10,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:23:10,416 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:23:10,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 02:23:10,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:10,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:23:10,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:10,840 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:23:10,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:23:10,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:10,902 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:10,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:11,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:23:11,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:23:11,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:23:11,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:11,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:11,133 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:11,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:11,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:11,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:11,213 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:23:11,213 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 3 case distinctions, treesize of input 180 treesize of output 185 [2022-11-22 02:23:11,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:11,297 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:11,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:11,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:23:11,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:23:11,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:11,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:23:11,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:11,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:11,551 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:11,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:11,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:11,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:11,664 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-22 02:23:11,664 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 3 case distinctions, treesize of input 180 treesize of output 185 [2022-11-22 02:23:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:11,765 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:11,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:11,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:23:11,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:14,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11518#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_31| Int)) (and (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_31|)) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_31|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_31|) (* |ULTIMATE.start_main_~i~2#1| 4)) |ULTIMATE.start_main_~i~2#1|)) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_31|) 0))) (= |ULTIMATE.start_main_~i~2#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:23:14,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:23:14,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:14,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-11-22 02:23:14,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006902654] [2022-11-22 02:23:14,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:14,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:23:14,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:23:14,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:23:14,092 INFO L87 Difference]: Start difference. First operand 210 states and 234 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 02:23:14,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:14,553 INFO L93 Difference]: Finished difference Result 180 states and 198 transitions. [2022-11-22 02:23:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:23:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 134 [2022-11-22 02:23:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:14,555 INFO L225 Difference]: With dead ends: 180 [2022-11-22 02:23:14,555 INFO L226 Difference]: Without dead ends: 180 [2022-11-22 02:23:14,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 354 SyntacticMatches, 27 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=366, Invalid=1704, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 02:23:14,556 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:14,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 93 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:23:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-22 02:23:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-11-22 02:23:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.112994350282486) internal successors, (197), 178 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 197 transitions. [2022-11-22 02:23:14,561 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 197 transitions. Word has length 134 [2022-11-22 02:23:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:14,561 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 197 transitions. [2022-11-22 02:23:14,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 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 02:23:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 197 transitions. [2022-11-22 02:23:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-22 02:23:14,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:14,563 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:14,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:14,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:14,770 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:23:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1207545595, now seen corresponding path program 5 times [2022-11-22 02:23:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:14,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620021573] [2022-11-22 02:23:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 891 proven. 311 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-22 02:23:15,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:15,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620021573] [2022-11-22 02:23:15,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620021573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:15,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761417844] [2022-11-22 02:23:15,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:23:15,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:15,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:15,379 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:15,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 02:23:15,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-22 02:23:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:23:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:23:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 537 proven. 35 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-11-22 02:23:16,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 526 proven. 46 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-11-22 02:23:16,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761417844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:23:16,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1005609174] [2022-11-22 02:23:16,636 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:23:16,637 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:16,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:16,637 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:16,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:16,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:23:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:16,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:23:16,688 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:23:16,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:23:16,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:16,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:23:17,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:17,036 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:17,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:17,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:17,106 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:17,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:17,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:23:17,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:23:17,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:17,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:23:17,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:23:17,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:17,365 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:17,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:17,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:23:17,420 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:17,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:23:17,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:23:17,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:20,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12757#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~i~2#1| 0) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_32| Int)) (and (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_32|)) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_32|) 0) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_32|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_32|) (* |ULTIMATE.start_main_~i~2#1| 4)) |ULTIMATE.start_main_~i~2#1|)))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:23:20,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:23:20,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:20,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 36 [2022-11-22 02:23:20,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080391462] [2022-11-22 02:23:20,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:20,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 02:23:20,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 02:23:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1713, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 02:23:20,352 INFO L87 Difference]: Start difference. First operand 179 states and 197 transitions. Second operand has 36 states, 36 states have (on average 3.7222222222222223) internal successors, (134), 36 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 02:23:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:24,312 INFO L93 Difference]: Finished difference Result 464 states and 524 transitions. [2022-11-22 02:23:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-11-22 02:23:24,312 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.7222222222222223) internal successors, (134), 36 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) Word has length 136 [2022-11-22 02:23:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:24,315 INFO L225 Difference]: With dead ends: 464 [2022-11-22 02:23:24,315 INFO L226 Difference]: Without dead ends: 464 [2022-11-22 02:23:24,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 359 SyntacticMatches, 21 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11774 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5610, Invalid=25896, Unknown=0, NotChecked=0, Total=31506 [2022-11-22 02:23:24,319 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 615 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:24,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 34 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:23:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-11-22 02:23:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 344. [2022-11-22 02:23:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 342 states have (on average 1.1432748538011697) internal successors, (391), 343 states have internal predecessors, (391), 0 states have call successors, (0), 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 02:23:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 391 transitions. [2022-11-22 02:23:24,328 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 391 transitions. Word has length 136 [2022-11-22 02:23:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:24,328 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 391 transitions. [2022-11-22 02:23:24,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.7222222222222223) internal successors, (134), 36 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 02:23:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 391 transitions. [2022-11-22 02:23:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-22 02:23:24,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:24,331 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 21, 21, 21, 7, 7, 7, 6, 1, 1] [2022-11-22 02:23:24,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-22 02:23:24,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:24,539 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:23:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash -623874583, now seen corresponding path program 6 times [2022-11-22 02:23:24,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:24,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107133052] [2022-11-22 02:23:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:24,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1636 backedges. 125 proven. 1330 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-22 02:23:25,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:25,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107133052] [2022-11-22 02:23:25,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107133052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:25,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755830556] [2022-11-22 02:23:25,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:23:25,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:25,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:25,423 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:25,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 02:28:03,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:28:03,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:28:03,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:28:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1636 backedges. 802 proven. 51 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-11-22 02:28:03,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:28:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1636 backedges. 802 proven. 51 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-11-22 02:28:04,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755830556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:28:04,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534174085] [2022-11-22 02:28:04,196 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:28:04,196 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:28:04,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:28:04,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:28:04,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:28:04,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:04,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:04,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:28:04,254 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:04,271 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:04,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:04,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:04,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:28:04,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:04,430 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:28:04,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:28:04,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:04,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:04,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:28:04,565 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:04,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:04,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:28:04,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:04,705 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:28:04,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:28:04,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:04,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:04,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2022-11-22 02:28:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:04,902 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 24 treesize of output 23 [2022-11-22 02:28:04,993 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:28:04,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-11-22 02:28:05,085 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:28:05,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:28:05,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:05,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:05,300 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 02:28:05,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 270 treesize of output 180 [2022-11-22 02:28:05,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:05,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:05,687 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:05,696 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:05,780 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:28:05,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 70 [2022-11-22 02:28:05,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:05,880 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-22 02:28:05,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 36 [2022-11-22 02:28:06,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:06,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:06,038 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-22 02:28:06,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 305 treesize of output 233 [2022-11-22 02:28:06,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:06,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:06,421 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:28:06,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:28:06,542 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:28:06,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:28:06,736 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:28:06,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:28:07,061 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:28:07,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:28:07,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:07,380 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:28:07,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:28:07,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:07,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:07,657 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:07,666 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:07,843 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:28:07,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:28:08,582 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-22 02:28:08,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:28:09,385 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-22 02:28:09,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 892 treesize of output 632 [2022-11-22 02:28:10,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:10,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:11,110 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:28:11,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:28:11,226 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 02:28:11,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-22 02:28:11,364 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-22 02:28:11,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 50 [2022-11-22 02:28:11,561 INFO L321 Elim1Store]: treesize reduction 96, result has 38.9 percent of original size [2022-11-22 02:28:11,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 134 [2022-11-22 02:28:12,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:12,261 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:28:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:28:12,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:12,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:12,707 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:12,716 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:28:12,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 02:28:12,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 02:28:12,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:12,806 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:28:12,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 02:28:12,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:12,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:28:12,919 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-22 02:28:12,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 250 [2022-11-22 02:28:13,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:13,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:28:13,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-22 02:28:13,307 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:28:15,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14730#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_main_~i~2#1| 4) |ULTIMATE.start_main_~#b~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_~i~1#1|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 (+ |ULTIMATE.start_bar_#res#1| 2147483648)) (<= 0 |ULTIMATE.start_bar_#in~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_bar_#in~b#1.base|) (<= 0 |ULTIMATE.start_bar_~b#1.offset|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_foo_~size#1| 100) (<= |ULTIMATE.start_bar_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_bar_~res~0#1| |ULTIMATE.start_bar_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (or (and (= |ULTIMATE.start_foo_~i~1#1| |ULTIMATE.start_foo_#res#1|) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_265| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_265|) (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_265|) 0))) (= |ULTIMATE.start_bar_#res#1| 0)) (and (not (= |ULTIMATE.start_bar_#res#1| 0)) (= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_#res#1|) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_265| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~#a~0#1.base_265|) (= (select |#valid| |v_ULTIMATE.start_foo_~#a~0#1.base_265|) 0))))) (= |ULTIMATE.start_main_#t~ret6#1| |ULTIMATE.start_foo_#res#1|) (<= |ULTIMATE.start_bar_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_bar_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_bar_#in~size#1| 100) (<= |ULTIMATE.start_bar_~size#1| 100) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_bar_~i~0#1| |ULTIMATE.start_bar_~size#1|)) (<= 0 |ULTIMATE.start_bar_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= |ULTIMATE.start_foo_#in~n#1| 100) (<= 0 |ULTIMATE.start_bar_~b#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret6#1| 2147483647) (<= |ULTIMATE.start_main_~i~2#1| 100) (<= |ULTIMATE.start_bar_#in~b#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 100) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= |ULTIMATE.start_foo_~n#1| 100) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:28:15,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:28:15,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:28:15,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 41 [2022-11-22 02:28:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081971362] [2022-11-22 02:28:15,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:28:15,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-22 02:28:15,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-22 02:28:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1939, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 02:28:15,696 INFO L87 Difference]: Start difference. First operand 344 states and 391 transitions. Second operand has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 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 02:28:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:23,013 INFO L93 Difference]: Finished difference Result 784 states and 882 transitions. [2022-11-22 02:28:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-22 02:28:23,014 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 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 142 [2022-11-22 02:28:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:23,017 INFO L225 Difference]: With dead ends: 784 [2022-11-22 02:28:23,018 INFO L226 Difference]: Without dead ends: 784 [2022-11-22 02:28:23,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 391 SyntacticMatches, 7 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23836 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=7859, Invalid=51433, Unknown=0, NotChecked=0, Total=59292 [2022-11-22 02:28:23,026 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1485 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:23,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 25 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:28:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-11-22 02:28:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 442. [2022-11-22 02:28:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 440 states have (on average 1.1272727272727272) internal successors, (496), 441 states have internal predecessors, (496), 0 states have call successors, (0), 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 02:28:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 496 transitions. [2022-11-22 02:28:23,041 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 496 transitions. Word has length 142 [2022-11-22 02:28:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:23,042 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 496 transitions. [2022-11-22 02:28:23,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 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 02:28:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 496 transitions. [2022-11-22 02:28:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-22 02:28:23,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:23,045 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 21, 21, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-22 02:28:23,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:23,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:23,259 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-22 02:28:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:23,259 INFO L85 PathProgramCache]: Analyzing trace with hash 156401955, now seen corresponding path program 6 times [2022-11-22 02:28:23,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:23,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384301947] [2022-11-22 02:28:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:23,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2173 backedges. 1113 proven. 579 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2022-11-22 02:28:24,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384301947] [2022-11-22 02:28:24,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384301947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19742108] [2022-11-22 02:28:24,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:28:24,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:24,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:24,012 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:24,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ded1c5-ff7f-437d-9502-8ceeb5e71fc7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process