./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0237.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0237.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur --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 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea --- 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-38b53e6 [2022-11-25 22:22:36,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:22:36,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:22:36,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:22:36,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:22:36,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:22:36,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:22:36,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:22:36,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:22:36,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:22:36,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:22:36,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:22:36,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:22:36,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:22:36,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:22:36,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:22:36,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:22:36,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:22:36,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:22:36,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:22:36,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:22:36,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:22:36,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:22:36,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:22:36,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:22:36,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:22:36,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:22:36,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:22:36,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:22:36,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:22:36,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:22:36,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:22:36,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:22:36,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:22:36,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:22:36,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:22:36,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:22:36,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:22:36,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:22:36,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:22:36,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:22:36,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 22:22:36,629 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:22:36,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:22:36,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:22:36,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:22:36,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:22:36,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:22:36,632 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:22:36,633 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:22:36,633 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:22:36,633 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:22:36,634 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:22:36,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:22:36,635 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:22:36,635 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:22:36,636 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:22:36,636 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:22:36,636 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:22:36,637 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:22:36,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 22:22:36,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 22:22:36,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:22:36,638 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:22:36,639 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 22:22:36,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:22:36,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:22:36,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:22:36,640 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 22:22:36,640 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 22:22:36,641 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 22:22:36,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:22:36,641 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 22:22:36,642 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:22:36,642 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:22:36,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:22:36,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:22:36,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:22:36,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:22:36,643 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:22:36,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:22:36,644 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:22:36,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:22:36,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:22:36,645 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_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea [2022-11-25 22:22:36,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:22:36,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:22:36,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:22:36,992 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:22:36,993 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:22:36,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/memsafety/test-0237.i [2022-11-25 22:22:40,071 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:22:40,423 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:22:40,427 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/sv-benchmarks/c/memsafety/test-0237.i [2022-11-25 22:22:40,446 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/data/020052ca2/e385060d25784963a170c04ec17e3b0f/FLAG6ac1ffaa4 [2022-11-25 22:22:40,469 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/data/020052ca2/e385060d25784963a170c04ec17e3b0f [2022-11-25 22:22:40,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:22:40,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:22:40,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:22:40,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:22:40,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:22:40,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:22:40" (1/1) ... [2022-11-25 22:22:40,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219e4fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:40, skipping insertion in model container [2022-11-25 22:22:40,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:22:40" (1/1) ... [2022-11-25 22:22:40,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:22:40,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:22:40,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:22:40,983 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:22:41,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:22:41,126 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:22:41,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41 WrapperNode [2022-11-25 22:22:41,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:22:41,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:22:41,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:22:41,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:22:41,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,226 INFO L138 Inliner]: procedures = 188, calls = 66, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 212 [2022-11-25 22:22:41,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:22:41,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:22:41,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:22:41,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:22:41,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:22:41,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:22:41,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:22:41,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:22:41,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (1/1) ... [2022-11-25 22:22:41,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:22:41,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:41,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:22:41,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:22:41,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 22:22:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:22:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 22:22:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 22:22:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-11-25 22:22:41,406 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-11-25 22:22:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:22:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 22:22:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:22:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:22:41,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:22:41,635 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:22:41,637 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:22:42,313 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:22:42,422 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:22:42,422 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 22:22:42,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:22:42 BoogieIcfgContainer [2022-11-25 22:22:42,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:22:42,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:22:42,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:22:42,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:22:42,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:22:40" (1/3) ... [2022-11-25 22:22:42,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d12cd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:22:42, skipping insertion in model container [2022-11-25 22:22:42,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:22:41" (2/3) ... [2022-11-25 22:22:42,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d12cd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:22:42, skipping insertion in model container [2022-11-25 22:22:42,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:22:42" (3/3) ... [2022-11-25 22:22:42,441 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0237.i [2022-11-25 22:22:42,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:22:42,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2022-11-25 22:22:42,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:22:42,540 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;@4de35ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:22:42,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2022-11-25 22:22:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 82 states have (on average 2.317073170731707) internal successors, (190), 169 states have internal predecessors, (190), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:22:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 22:22:42,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:42,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 22:22:42,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:22:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash 374307, now seen corresponding path program 1 times [2022-11-25 22:22:42,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:42,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213367755] [2022-11-25 22:22:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:42,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:22:42,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:42,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213367755] [2022-11-25 22:22:42,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213367755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:42,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:22:42,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:22:42,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831102086] [2022-11-25 22:22:42,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:42,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 22:22:42,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 22:22:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:22:42,839 INFO L87 Difference]: Start difference. First operand has 177 states, 82 states have (on average 2.317073170731707) internal successors, (190), 169 states have internal predecessors, (190), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:42,963 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2022-11-25 22:22:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 22:22:42,966 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-25 22:22:42,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:42,981 INFO L225 Difference]: With dead ends: 177 [2022-11-25 22:22:42,981 INFO L226 Difference]: Without dead ends: 176 [2022-11-25 22:22:42,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:22:42,990 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:42,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:22:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-25 22:22:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-11-25 22:22:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 82 states have (on average 2.182926829268293) internal successors, (179), 168 states have internal predecessors, (179), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:22:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2022-11-25 22:22:43,065 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 3 [2022-11-25 22:22:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:43,065 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2022-11-25 22:22:43,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2022-11-25 22:22:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:22:43,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:43,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 22:22:43,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:22:43,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:22:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash 355142826, now seen corresponding path program 1 times [2022-11-25 22:22:43,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:43,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564233907] [2022-11-25 22:22:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:43,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:43,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:22:43,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722030421] [2022-11-25 22:22:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:43,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:43,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:43,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:43,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:22:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:43,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:22:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:43,272 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 [2022-11-25 22:22:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:22:43,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:22:43,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564233907] [2022-11-25 22:22:43,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:22:43,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722030421] [2022-11-25 22:22:43,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722030421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:43,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:22:43,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:22:43,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735857503] [2022-11-25 22:22:43,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:43,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:22:43,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:22:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:22:43,286 INFO L87 Difference]: Start difference. First operand 176 states and 191 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:43,449 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2022-11-25 22:22:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:22:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:22:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:43,451 INFO L225 Difference]: With dead ends: 175 [2022-11-25 22:22:43,451 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 22:22:43,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:22:43,453 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:43,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 260 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:22:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 22:22:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-25 22:22:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 167 states have internal predecessors, (178), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:22:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2022-11-25 22:22:43,462 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 5 [2022-11-25 22:22:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:43,463 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2022-11-25 22:22:43,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2022-11-25 22:22:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:22:43,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:43,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 22:22:43,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:43,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:43,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:22:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1875473933, now seen corresponding path program 1 times [2022-11-25 22:22:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:43,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158203708] [2022-11-25 22:22:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:43,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:43,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:22:43,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169138699] [2022-11-25 22:22:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:43,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:43,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:43,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:22:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 22:22:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:43,922 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 [2022-11-25 22:22:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:22:43,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:22:43,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158203708] [2022-11-25 22:22:43,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:22:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169138699] [2022-11-25 22:22:43,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169138699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:43,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:22:43,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:22:43,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104608011] [2022-11-25 22:22:43,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:43,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:22:43,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:22:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:22:43,956 INFO L87 Difference]: Start difference. First operand 175 states and 190 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:44,154 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2022-11-25 22:22:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:22:44,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 22:22:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:44,156 INFO L225 Difference]: With dead ends: 180 [2022-11-25 22:22:44,156 INFO L226 Difference]: Without dead ends: 180 [2022-11-25 22:22:44,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:22:44,157 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 8 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:44,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 435 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:22:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-25 22:22:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-25 22:22:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 86 states have (on average 2.127906976744186) internal successors, (183), 171 states have internal predecessors, (183), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:22:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2022-11-25 22:22:44,171 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 6 [2022-11-25 22:22:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:44,171 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2022-11-25 22:22:44,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2022-11-25 22:22:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 22:22:44,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:44,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:22:44,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:44,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:44,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:22:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1708028809, now seen corresponding path program 1 times [2022-11-25 22:22:44,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:44,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117730115] [2022-11-25 22:22:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:44,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:44,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:22:44,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651781319] [2022-11-25 22:22:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:44,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:44,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:44,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:44,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:22:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:44,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 22:22:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:44,617 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 [2022-11-25 22:22:44,754 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 15 treesize of output 11 [2022-11-25 22:22:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:22:44,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:22:44,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:44,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117730115] [2022-11-25 22:22:44,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:22:44,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651781319] [2022-11-25 22:22:44,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651781319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:44,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:22:44,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:22:44,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620940864] [2022-11-25 22:22:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:22:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:22:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:22:44,931 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 22:22:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:49,915 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2022-11-25 22:22:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:22:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-25 22:22:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:49,917 INFO L225 Difference]: With dead ends: 184 [2022-11-25 22:22:49,917 INFO L226 Difference]: Without dead ends: 182 [2022-11-25 22:22:49,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2022-11-25 22:22:49,919 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 7 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:49,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:22:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-25 22:22:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-11-25 22:22:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 88 states have (on average 2.102272727272727) internal successors, (185), 173 states have internal predecessors, (185), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:22:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 197 transitions. [2022-11-25 22:22:49,927 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 197 transitions. Word has length 14 [2022-11-25 22:22:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:49,928 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 197 transitions. [2022-11-25 22:22:49,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 22:22:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 197 transitions. [2022-11-25 22:22:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 22:22:49,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:49,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:22:49,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:50,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:50,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:22:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash 835038546, now seen corresponding path program 1 times [2022-11-25 22:22:50,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:50,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142690796] [2022-11-25 22:22:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:50,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:50,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:22:50,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297357846] [2022-11-25 22:22:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:50,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:50,169 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:50,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:22:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:50,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 22:22:50,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:50,393 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:22:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:22:50,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:22:50,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:50,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142690796] [2022-11-25 22:22:50,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:22:50,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297357846] [2022-11-25 22:22:50,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297357846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:50,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:22:50,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:22:50,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801880249] [2022-11-25 22:22:50,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:50,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:22:50,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:22:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:22:50,432 INFO L87 Difference]: Start difference. First operand 182 states and 197 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 22:22:50,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:50,664 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2022-11-25 22:22:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:22:50,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-25 22:22:50,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:50,666 INFO L225 Difference]: With dead ends: 188 [2022-11-25 22:22:50,666 INFO L226 Difference]: Without dead ends: 188 [2022-11-25 22:22:50,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:22:50,667 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 8 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:50,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 423 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:22:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-25 22:22:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-25 22:22:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 93 states have (on average 2.053763440860215) internal successors, (191), 178 states have internal predecessors, (191), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:22:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2022-11-25 22:22:50,692 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 15 [2022-11-25 22:22:50,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:50,693 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2022-11-25 22:22:50,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 22:22:50,693 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2022-11-25 22:22:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 22:22:50,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:50,699 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:22:50,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:50,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:22:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 650282360, now seen corresponding path program 1 times [2022-11-25 22:22:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963266590] [2022-11-25 22:22:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:50,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:50,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:22:50,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098709462] [2022-11-25 22:22:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:50,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:50,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:50,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:50,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:22:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:22:51,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:51,315 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 [2022-11-25 22:22:51,345 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 13 treesize of output 9 [2022-11-25 22:22:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 22:22:51,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 22:22:51,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:51,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963266590] [2022-11-25 22:22:51,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:22:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098709462] [2022-11-25 22:22:51,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098709462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955933923] [2022-11-25 22:22:51,694 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 22:22:51,694 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:51,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:51,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:51,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:22:51,789 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 [2022-11-25 22:22:51,797 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 [2022-11-25 22:22:51,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:22:51,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:22:51,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:22:51,928 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 195 treesize of output 194 [2022-11-25 22:22:51,945 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 197 treesize of output 196 [2022-11-25 22:22:51,962 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 195 treesize of output 194 [2022-11-25 22:22:52,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:22:52,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:22:52,079 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 14 treesize of output 10 [2022-11-25 22:22:52,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:22:52,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:22:52,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:22:52,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:22:53,871 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:22:53,917 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 [2022-11-25 22:22:53,941 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 [2022-11-25 22:22:54,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:22:54,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:22:54,145 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 [2022-11-25 22:22:54,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:22:54,223 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 14 treesize of output 10 [2022-11-25 22:22:54,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:22:54,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:00,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [955933923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:00,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:23:00,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6] total 31 [2022-11-25 22:23:00,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101783225] [2022-11-25 22:23:00,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:00,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 22:23:00,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 22:23:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:23:00,714 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 22:23:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:04,172 INFO L93 Difference]: Finished difference Result 379 states and 409 transitions. [2022-11-25 22:23:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:23:04,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2022-11-25 22:23:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:04,175 INFO L225 Difference]: With dead ends: 379 [2022-11-25 22:23:04,175 INFO L226 Difference]: Without dead ends: 379 [2022-11-25 22:23:04,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-11-25 22:23:04,176 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 323 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:04,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 970 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-25 22:23:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-25 22:23:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 245. [2022-11-25 22:23:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 141 states have (on average 2.0141843971631204) internal successors, (284), 226 states have internal predecessors, (284), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:23:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 308 transitions. [2022-11-25 22:23:04,186 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 308 transitions. Word has length 50 [2022-11-25 22:23:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:04,187 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 308 transitions. [2022-11-25 22:23:04,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 22:23:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 308 transitions. [2022-11-25 22:23:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 22:23:04,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:04,189 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:04,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:04,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 22:23:04,396 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:23:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:04,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1329181019, now seen corresponding path program 1 times [2022-11-25 22:23:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:04,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24300796] [2022-11-25 22:23:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:04,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:23:04,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369042084] [2022-11-25 22:23:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:04,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:04,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:04,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:04,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:23:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 22:23:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:04,738 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_224 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_224))) is different from true [2022-11-25 22:23:04,799 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:23:04,799 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 14 [2022-11-25 22:23:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 1 not checked. [2022-11-25 22:23:04,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:05,071 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 22:23:05,072 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 12 treesize of output 11 [2022-11-25 22:23:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:23:05,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:05,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24300796] [2022-11-25 22:23:05,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:23:05,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369042084] [2022-11-25 22:23:05,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369042084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:23:05,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140480283] [2022-11-25 22:23:05,093 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 22:23:05,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:05,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:05,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:05,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:05,125 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 [2022-11-25 22:23:05,132 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 [2022-11-25 22:23:05,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:23:05,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:23:05,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:23:05,256 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:23:05,257 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 182 treesize of output 185 [2022-11-25 22:23:05,292 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 22:23:05,293 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 180 treesize of output 183 [2022-11-25 22:23:05,324 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:23:05,325 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 174 treesize of output 177 [2022-11-25 22:23:05,444 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 14 treesize of output 10 [2022-11-25 22:23:05,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:23:05,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:05,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:05,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:05,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:05,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:06,858 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:23:06,898 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 [2022-11-25 22:23:06,932 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 [2022-11-25 22:23:07,064 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 14 treesize of output 10 [2022-11-25 22:23:07,085 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 [2022-11-25 22:23:07,113 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 14 treesize of output 10 [2022-11-25 22:23:07,179 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 [2022-11-25 22:23:07,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:07,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:07,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:15,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3400#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:15,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:15,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:23:15,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-11-25 22:23:15,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122583183] [2022-11-25 22:23:15,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:15,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 22:23:15,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 22:23:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=910, Unknown=1, NotChecked=62, Total=1122 [2022-11-25 22:23:15,007 INFO L87 Difference]: Start difference. First operand 245 states and 308 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:23:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:15,704 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2022-11-25 22:23:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:23:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-11-25 22:23:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:15,706 INFO L225 Difference]: With dead ends: 274 [2022-11-25 22:23:15,707 INFO L226 Difference]: Without dead ends: 274 [2022-11-25 22:23:15,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=179, Invalid=1156, Unknown=1, NotChecked=70, Total=1406 [2022-11-25 22:23:15,708 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 112 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:15,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 809 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 696 Invalid, 0 Unknown, 202 Unchecked, 0.6s Time] [2022-11-25 22:23:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-25 22:23:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 241. [2022-11-25 22:23:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 141 states have (on average 1.9574468085106382) internal successors, (276), 222 states have internal predecessors, (276), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:23:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 300 transitions. [2022-11-25 22:23:15,717 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 300 transitions. Word has length 54 [2022-11-25 22:23:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:15,717 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 300 transitions. [2022-11-25 22:23:15,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 22:23:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 300 transitions. [2022-11-25 22:23:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 22:23:15,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:15,719 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:15,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:15,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:15,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:23:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1329181020, now seen corresponding path program 1 times [2022-11-25 22:23:15,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:15,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358120218] [2022-11-25 22:23:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:15,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:15,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:23:15,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790712786] [2022-11-25 22:23:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:15,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:15,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:15,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:15,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:23:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:23:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:16,358 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 [2022-11-25 22:23:16,387 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 13 treesize of output 9 [2022-11-25 22:23:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 84 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 22:23:16,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-25 22:23:16,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358120218] [2022-11-25 22:23:16,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:23:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790712786] [2022-11-25 22:23:16,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790712786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:23:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [673950268] [2022-11-25 22:23:16,705 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 22:23:16,705 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:16,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:16,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:16,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:16,736 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 [2022-11-25 22:23:16,743 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 [2022-11-25 22:23:16,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:23:16,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:16,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:16,831 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 197 treesize of output 196 [2022-11-25 22:23:16,846 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 195 treesize of output 194 [2022-11-25 22:23:16,859 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 195 treesize of output 194 [2022-11-25 22:23:16,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:16,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:23:16,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:16,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:17,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:17,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:17,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:18,757 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:23:18,801 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 [2022-11-25 22:23:18,828 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 [2022-11-25 22:23:18,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:18,974 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 [2022-11-25 22:23:19,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:19,058 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 14 treesize of output 10 [2022-11-25 22:23:19,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:23:19,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:19,091 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:26,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4276#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:26,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:26,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:23:26,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-25 22:23:26,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267903175] [2022-11-25 22:23:26,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:26,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 22:23:26,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:26,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 22:23:26,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 22:23:26,746 INFO L87 Difference]: Start difference. First operand 241 states and 300 transitions. Second operand has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-25 22:23:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:27,408 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2022-11-25 22:23:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:23:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2022-11-25 22:23:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:27,410 INFO L225 Difference]: With dead ends: 265 [2022-11-25 22:23:27,411 INFO L226 Difference]: Without dead ends: 255 [2022-11-25 22:23:27,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 22:23:27,412 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 27 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:27,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 794 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:23:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-25 22:23:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-11-25 22:23:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 155 states have (on average 1.8709677419354838) internal successors, (290), 236 states have internal predecessors, (290), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:23:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 314 transitions. [2022-11-25 22:23:27,420 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 314 transitions. Word has length 54 [2022-11-25 22:23:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:27,420 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 314 transitions. [2022-11-25 22:23:27,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-25 22:23:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 314 transitions. [2022-11-25 22:23:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:23:27,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:27,422 INFO L195 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:27,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:27,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:27,630 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:23:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1066635714, now seen corresponding path program 2 times [2022-11-25 22:23:27,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:27,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974055440] [2022-11-25 22:23:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:27,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:27,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:23:27,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088826162] [2022-11-25 22:23:27,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:23:27,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:27,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:27,672 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:27,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:23:28,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:23:28,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:23:28,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 22:23:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:28,376 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 [2022-11-25 22:23:28,401 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 13 treesize of output 9 [2022-11-25 22:23:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 130 proven. 10 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-11-25 22:23:28,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 130 proven. 10 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-11-25 22:23:28,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974055440] [2022-11-25 22:23:28,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:23:28,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088826162] [2022-11-25 22:23:28,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088826162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:23:28,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615836146] [2022-11-25 22:23:28,943 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 22:23:28,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:28,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:28,944 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:28,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:28,977 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 [2022-11-25 22:23:28,986 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 [2022-11-25 22:23:29,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:29,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:23:29,029 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 14 treesize of output 10 [2022-11-25 22:23:29,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 196 [2022-11-25 22:23:29,090 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 195 treesize of output 194 [2022-11-25 22:23:29,103 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 195 treesize of output 194 [2022-11-25 22:23:29,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:29,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:29,169 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 [2022-11-25 22:23:29,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:29,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:29,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:29,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:30,905 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:23:30,959 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 [2022-11-25 22:23:30,987 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 [2022-11-25 22:23:31,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:23:31,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:23:31,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:23:31,194 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 14 treesize of output 10 [2022-11-25 22:23:31,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:31,213 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 [2022-11-25 22:23:31,223 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:39,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5264#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:39,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:39,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:23:39,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-25 22:23:39,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048548773] [2022-11-25 22:23:39,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:39,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 22:23:39,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 22:23:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:23:39,238 INFO L87 Difference]: Start difference. First operand 255 states and 314 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 22:23:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:40,997 INFO L93 Difference]: Finished difference Result 287 states and 354 transitions. [2022-11-25 22:23:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:23:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 70 [2022-11-25 22:23:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:40,999 INFO L225 Difference]: With dead ends: 287 [2022-11-25 22:23:41,000 INFO L226 Difference]: Without dead ends: 275 [2022-11-25 22:23:41,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 166 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=483, Invalid=2709, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 22:23:41,006 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 53 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:41,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1078 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:23:41,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-25 22:23:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-11-25 22:23:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 175 states have (on average 1.7714285714285714) internal successors, (310), 256 states have internal predecessors, (310), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:23:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 334 transitions. [2022-11-25 22:23:41,024 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 334 transitions. Word has length 70 [2022-11-25 22:23:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:41,024 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 334 transitions. [2022-11-25 22:23:41,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 22:23:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 334 transitions. [2022-11-25 22:23:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 22:23:41,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:41,026 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:41,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:41,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:41,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:23:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash 362371085, now seen corresponding path program 3 times [2022-11-25 22:23:41,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:41,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368342502] [2022-11-25 22:23:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:41,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:41,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:23:41,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78012002] [2022-11-25 22:23:41,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:23:41,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:41,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:41,273 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:41,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:23:44,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:23:44,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:23:44,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 22:23:44,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:44,712 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 [2022-11-25 22:23:44,744 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 13 treesize of output 9 [2022-11-25 22:23:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 305 proven. 205 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-11-25 22:23:45,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 345 proven. 55 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-11-25 22:23:45,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:45,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368342502] [2022-11-25 22:23:45,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:23:45,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78012002] [2022-11-25 22:23:45,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78012002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:23:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501920658] [2022-11-25 22:23:45,934 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 22:23:45,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:45,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:45,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:45,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:45,966 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 [2022-11-25 22:23:45,973 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 [2022-11-25 22:23:45,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:46,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:46,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:23:46,058 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 197 treesize of output 196 [2022-11-25 22:23:46,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 22:23:46,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 194 [2022-11-25 22:23:46,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:46,149 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 14 treesize of output 10 [2022-11-25 22:23:46,156 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 [2022-11-25 22:23:46,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:46,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:46,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:46,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:23:47,760 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:23:47,786 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 [2022-11-25 22:23:47,807 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 [2022-11-25 22:23:47,912 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 [2022-11-25 22:23:47,939 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 14 treesize of output 10 [2022-11-25 22:23:47,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:48,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:48,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:23:48,043 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 [2022-11-25 22:23:48,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:57,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6410#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:57,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:57,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:23:57,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2022-11-25 22:23:57,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499428564] [2022-11-25 22:23:57,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 22:23:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:57,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 22:23:57,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 22:23:57,478 INFO L87 Difference]: Start difference. First operand 275 states and 334 transitions. Second operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 32 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 22:24:15,112 WARN L233 SmtUtils]: Spent 12.56s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:24:22,127 WARN L233 SmtUtils]: Spent 6.67s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:24:29,372 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:24:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:38,333 INFO L93 Difference]: Finished difference Result 351 states and 442 transitions. [2022-11-25 22:24:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 22:24:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 32 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 83 [2022-11-25 22:24:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:38,338 INFO L225 Difference]: With dead ends: 351 [2022-11-25 22:24:38,338 INFO L226 Difference]: Without dead ends: 335 [2022-11-25 22:24:38,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2806 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=1569, Invalid=8330, Unknown=1, NotChecked=0, Total=9900 [2022-11-25 22:24:38,342 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 146 mSDsluCounter, 2401 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:38,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 2552 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 22:24:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-25 22:24:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 311. [2022-11-25 22:24:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 211 states have (on average 1.6398104265402844) internal successors, (346), 292 states have internal predecessors, (346), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:24:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 370 transitions. [2022-11-25 22:24:38,357 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 370 transitions. Word has length 83 [2022-11-25 22:24:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:38,357 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 370 transitions. [2022-11-25 22:24:38,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 32 states have internal predecessors, (50), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 22:24:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 370 transitions. [2022-11-25 22:24:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-25 22:24:38,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:38,361 INFO L195 NwaCegarLoop]: trace histogram [71, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:38,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:38,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:24:38,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:24:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash 345482445, now seen corresponding path program 4 times [2022-11-25 22:24:38,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:38,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219683680] [2022-11-25 22:24:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:38,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:38,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:24:38,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425653489] [2022-11-25 22:24:38,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:24:38,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:38,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:38,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:38,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:25:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-25 22:25:00,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:00,209 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 [2022-11-25 22:25:00,321 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 15 treesize of output 11 [2022-11-25 22:25:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2986 backedges. 1723 proven. 517 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2022-11-25 22:25:05,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2986 backedges. 516 proven. 345 refuted. 0 times theorem prover too weak. 2125 trivial. 0 not checked. [2022-11-25 22:25:07,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:07,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219683680] [2022-11-25 22:25:07,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:25:07,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425653489] [2022-11-25 22:25:07,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425653489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:07,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589811235] [2022-11-25 22:25:07,507 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 22:25:07,507 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:07,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:07,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:07,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:07,541 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 [2022-11-25 22:25:07,549 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 [2022-11-25 22:25:07,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:25:07,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:25:07,649 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 11 treesize of output 7 [2022-11-25 22:25:07,720 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:25:07,720 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 182 treesize of output 185 [2022-11-25 22:25:07,802 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:25:07,802 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 178 treesize of output 181 [2022-11-25 22:25:07,883 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 22:25:07,883 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 176 treesize of output 179 [2022-11-25 22:25:08,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:25:08,023 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 14 treesize of output 10 [2022-11-25 22:25:08,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:25:08,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:25:08,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:25:08,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:25:08,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:25:09,413 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:25:09,461 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 [2022-11-25 22:25:09,486 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 [2022-11-25 22:25:09,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:25:09,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:25:09,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:25:09,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:25:09,818 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 14 treesize of output 10 [2022-11-25 22:25:09,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:25:09,842 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:22,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7935#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:25:22,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:22,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:25:22,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 41 [2022-11-25 22:25:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854790980] [2022-11-25 22:25:22,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 22:25:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 22:25:22,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=3573, Unknown=1, NotChecked=0, Total=3906 [2022-11-25 22:25:22,183 INFO L87 Difference]: Start difference. First operand 311 states and 370 transitions. Second operand has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:25:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:35,303 INFO L93 Difference]: Finished difference Result 343 states and 416 transitions. [2022-11-25 22:25:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 22:25:35,304 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 119 [2022-11-25 22:25:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:35,306 INFO L225 Difference]: With dead ends: 343 [2022-11-25 22:25:35,307 INFO L226 Difference]: Without dead ends: 341 [2022-11-25 22:25:35,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 288 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=762, Invalid=6893, Unknown=1, NotChecked=0, Total=7656 [2022-11-25 22:25:35,309 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 71 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 3798 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:35,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 3798 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-25 22:25:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-25 22:25:35,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 313. [2022-11-25 22:25:35,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 213 states have (on average 1.6338028169014085) internal successors, (348), 294 states have internal predecessors, (348), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:25:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 372 transitions. [2022-11-25 22:25:35,322 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 372 transitions. Word has length 119 [2022-11-25 22:25:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:35,322 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 372 transitions. [2022-11-25 22:25:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:25:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 372 transitions. [2022-11-25 22:25:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-25 22:25:35,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:35,325 INFO L195 NwaCegarLoop]: trace histogram [75, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:35,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:35,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:35,547 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:25:35,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:35,547 INFO L85 PathProgramCache]: Analyzing trace with hash -814591715, now seen corresponding path program 5 times [2022-11-25 22:25:35,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:35,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370570081] [2022-11-25 22:25:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:35,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:35,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:25:35,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761939072] [2022-11-25 22:25:35,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:25:35,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:35,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:35,645 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:35,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:25:36,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:25:36,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:25:36,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 22:25:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:36,405 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 8 treesize of output 7 [2022-11-25 22:25:36,843 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| Int)) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) 0) (exists ((v_ArrVal_2869 Int)) (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_2869) |c_#length|)))) is different from true [2022-11-25 22:25:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:37,030 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 17 treesize of output 17 [2022-11-25 22:25:37,039 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:25:37,040 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 [2022-11-25 22:25:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 1649 proven. 0 refuted. 0 times theorem prover too weak. 1349 trivial. 302 not checked. [2022-11-25 22:25:37,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:39,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370570081] [2022-11-25 22:25:39,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:25:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761939072] [2022-11-25 22:25:39,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761939072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821441926] [2022-11-25 22:25:39,238 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 22:25:39,238 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:39,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:39,238 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:39,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:39,274 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 [2022-11-25 22:25:39,283 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 [2022-11-25 22:25:39,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:25:39,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:25:39,424 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 11 treesize of output 7 [2022-11-25 22:25:39,549 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:25:39,549 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 182 treesize of output 185 [2022-11-25 22:25:39,588 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 22:25:39,589 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 180 treesize of output 183 [2022-11-25 22:25:39,623 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:25:39,624 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 174 treesize of output 177 [2022-11-25 22:25:39,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:25:39,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:25:39,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:25:39,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:25:39,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:25:39,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:25:39,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:25:41,050 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:25:41,104 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 [2022-11-25 22:25:41,132 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 10 treesize of output 9 [2022-11-25 22:25:41,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:25:41,286 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 11 treesize of output 7 [2022-11-25 22:25:41,343 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 13 treesize of output 9 [2022-11-25 22:25:41,412 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 14 treesize of output 10 [2022-11-25 22:25:41,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:25:41,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:25:41,450 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:51,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9049#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:25:51,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:51,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:25:51,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-25 22:25:51,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584987727] [2022-11-25 22:25:51,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:51,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 22:25:51,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:51,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 22:25:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=973, Unknown=1, NotChecked=64, Total=1190 [2022-11-25 22:25:51,317 INFO L87 Difference]: Start difference. First operand 313 states and 372 transitions. Second operand has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:25:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:52,661 INFO L93 Difference]: Finished difference Result 360 states and 425 transitions. [2022-11-25 22:25:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:25:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2022-11-25 22:25:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:52,664 INFO L225 Difference]: With dead ends: 360 [2022-11-25 22:25:52,665 INFO L226 Difference]: Without dead ends: 360 [2022-11-25 22:25:52,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 208 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=170, Invalid=1165, Unknown=1, NotChecked=70, Total=1406 [2022-11-25 22:25:52,666 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 288 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:52,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 506 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 814 Invalid, 0 Unknown, 197 Unchecked, 0.9s Time] [2022-11-25 22:25:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-25 22:25:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 309. [2022-11-25 22:25:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 213 states have (on average 1.596244131455399) internal successors, (340), 290 states have internal predecessors, (340), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:25:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 364 transitions. [2022-11-25 22:25:52,679 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 364 transitions. Word has length 123 [2022-11-25 22:25:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:52,680 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 364 transitions. [2022-11-25 22:25:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:25:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 364 transitions. [2022-11-25 22:25:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 22:25:52,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:52,683 INFO L195 NwaCegarLoop]: trace histogram [75, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:52,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:25:52,892 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:25:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1138282464, now seen corresponding path program 1 times [2022-11-25 22:25:52,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:52,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220621660] [2022-11-25 22:25:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:52,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:25:52,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966423372] [2022-11-25 22:25:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:52,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:52,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:52,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:25:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 22:25:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:53,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:25:53,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-11-25 22:25:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 1349 proven. 0 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2022-11-25 22:25:53,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:25:53,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220621660] [2022-11-25 22:25:53,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:25:53,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966423372] [2022-11-25 22:25:53,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966423372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:53,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:53,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:25:53,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118732855] [2022-11-25 22:25:53,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:25:53,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:53,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:25:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:25:53,732 INFO L87 Difference]: Start difference. First operand 309 states and 364 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:25:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:54,187 INFO L93 Difference]: Finished difference Result 310 states and 364 transitions. [2022-11-25 22:25:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:25:54,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2022-11-25 22:25:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:54,189 INFO L225 Difference]: With dead ends: 310 [2022-11-25 22:25:54,189 INFO L226 Difference]: Without dead ends: 310 [2022-11-25 22:25:54,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:25:54,190 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 19 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:54,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 749 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:25:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-25 22:25:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2022-11-25 22:25:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 213 states have (on average 1.5868544600938967) internal successors, (338), 289 states have internal predecessors, (338), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:25:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 362 transitions. [2022-11-25 22:25:54,211 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 362 transitions. Word has length 125 [2022-11-25 22:25:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:54,214 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 362 transitions. [2022-11-25 22:25:54,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:25:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 362 transitions. [2022-11-25 22:25:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 22:25:54,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:54,216 INFO L195 NwaCegarLoop]: trace histogram [75, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:54,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:54,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 22:25:54,426 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:25:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1138282463, now seen corresponding path program 1 times [2022-11-25 22:25:54,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:54,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690948390] [2022-11-25 22:25:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:54,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:25:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61197510] [2022-11-25 22:25:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:54,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:54,532 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:54,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:25:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 157 conjunts are in the unsatisfiable core [2022-11-25 22:25:55,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:55,460 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:26:15,832 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:26:15,833 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 16 treesize of output 22 [2022-11-25 22:26:16,006 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:26:16,006 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 [2022-11-25 22:26:21,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:26:21,569 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 13 treesize of output 9 [2022-11-25 22:26:24,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 13 [2022-11-25 22:26:24,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-25 22:26:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 1313 proven. 1386 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2022-11-25 22:26:28,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 1479 proven. 78 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2022-11-25 22:26:41,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:41,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690948390] [2022-11-25 22:26:41,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:26:41,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61197510] [2022-11-25 22:26:41,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61197510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:41,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645497480] [2022-11-25 22:26:41,533 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 22:26:41,534 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:41,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:41,534 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:41,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:41,574 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 [2022-11-25 22:26:41,583 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 [2022-11-25 22:26:41,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:26:41,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:26:41,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:26:41,969 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:26:41,969 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 182 treesize of output 185 [2022-11-25 22:26:42,046 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:26:42,046 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 178 treesize of output 181 [2022-11-25 22:26:42,116 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-25 22:26:42,116 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 176 treesize of output 179 [2022-11-25 22:26:42,217 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 14 treesize of output 10 [2022-11-25 22:26:42,224 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 [2022-11-25 22:26:42,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:26:42,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:26:42,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:26:42,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:26:42,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:26:43,335 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 19 treesize of output 1 [2022-11-25 22:26:43,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:26:43,388 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 13 treesize of output 9 [2022-11-25 22:26:43,572 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:26:43,624 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 [2022-11-25 22:26:43,636 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 [2022-11-25 22:26:43,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:26:43,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:26:43,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:26:43,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:43,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:26:43,885 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 14 treesize of output 10 [2022-11-25 22:26:43,899 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:29,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11566#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (= |ULTIMATE.start_l4_insert_#t~mem8#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (not (<= (+ |ULTIMATE.start_l4_insert_#t~mem8#1.offset| 4) (select |#length| |ULTIMATE.start_l4_insert_#t~mem8#1.base|))) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) |ULTIMATE.start_l4_insert_#t~mem8#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:27:29,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:29,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:27:29,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 20] total 70 [2022-11-25 22:27:29,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203717595] [2022-11-25 22:27:29,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:29,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 22:27:29,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 22:27:29,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=8363, Unknown=6, NotChecked=0, Total=8930 [2022-11-25 22:27:29,459 INFO L87 Difference]: Start difference. First operand 308 states and 362 transitions. Second operand has 71 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:27:31,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:27:38,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:27:43,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:27:47,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:27:52,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:27:56,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:02,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:08,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:14,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:16,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:26,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:32,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:34,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:43,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:48,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:28:50,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:00,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:06,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:08,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:19,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:22,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:24,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:36,858 WARN L233 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:39,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:46,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:29:48,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:30:01,054 WARN L233 SmtUtils]: Spent 8.86s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:03,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:30:12,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:30:14,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:30:25,768 WARN L233 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:54,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:30:56,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:31:12,345 WARN L233 SmtUtils]: Spent 11.17s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:31:14,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:31:23,114 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:31:42,622 WARN L233 SmtUtils]: Spent 10.57s on a formula simplification. DAG size of input: 52 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:31:45,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:32:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:00,761 INFO L93 Difference]: Finished difference Result 471 states and 608 transitions. [2022-11-25 22:32:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 22:32:00,762 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 125 [2022-11-25 22:32:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:00,766 INFO L225 Difference]: With dead ends: 471 [2022-11-25 22:32:00,766 INFO L226 Difference]: Without dead ends: 471 [2022-11-25 22:32:00,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 275 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4195 ImplicationChecksByTransitivity, 273.1s TimeCoverageRelationStatistics Valid=1175, Invalid=14049, Unknown=28, NotChecked=0, Total=15252 [2022-11-25 22:32:00,771 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 235 mSDsluCounter, 3849 mSDsCounter, 0 mSdLazyCounter, 6512 mSolverCounterSat, 21 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 3961 SdHoareTripleChecker+Invalid, 6565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 6512 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:00,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 3961 Invalid, 6565 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 6512 Invalid, 32 Unknown, 0 Unchecked, 84.1s Time] [2022-11-25 22:32:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-25 22:32:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 307. [2022-11-25 22:32:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 213 states have (on average 1.5774647887323943) internal successors, (336), 288 states have internal predecessors, (336), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:32:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 360 transitions. [2022-11-25 22:32:00,791 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 360 transitions. Word has length 125 [2022-11-25 22:32:00,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:00,792 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 360 transitions. [2022-11-25 22:32:00,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:32:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 360 transitions. [2022-11-25 22:32:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 22:32:00,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:00,795 INFO L195 NwaCegarLoop]: trace histogram [75, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:00,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 22:32:01,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:01,007 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:32:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:01,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1327525384, now seen corresponding path program 1 times [2022-11-25 22:32:01,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:01,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714973185] [2022-11-25 22:32:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:01,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:01,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:32:01,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307005550] [2022-11-25 22:32:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:01,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:01,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:01,087 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:32:01,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:32:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:01,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 22:32:01,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:32:02,320 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:32:02,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 22:32:02,665 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:32:02,665 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 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 22:32:02,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:32:02,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 21 treesize of output 9 [2022-11-25 22:32:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 1775 proven. 604 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2022-11-25 22:32:02,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:32:03,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714973185] [2022-11-25 22:32:03,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:32:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307005550] [2022-11-25 22:32:03,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307005550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1459873510] [2022-11-25 22:32:03,011 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-25 22:32:03,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:32:03,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:32:03,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:32:03,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:32:03,044 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 [2022-11-25 22:32:03,053 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 10 treesize of output 9 [2022-11-25 22:32:03,112 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 14 treesize of output 10 [2022-11-25 22:32:03,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:32:03,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:32:03,192 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 197 treesize of output 196 [2022-11-25 22:32:03,208 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 195 treesize of output 194 [2022-11-25 22:32:03,253 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 195 treesize of output 194 [2022-11-25 22:32:03,303 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 [2022-11-25 22:32:03,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:32:03,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:32:03,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:32:03,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:32:03,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:32:03,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:32:04,854 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 13 treesize of output 9 [2022-11-25 22:32:04,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:32:04,902 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 19 treesize of output 1 [2022-11-25 22:32:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:05,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 22:32:05,050 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 22:32:05,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 22:32:05,071 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 33 treesize of output 1 [2022-11-25 22:32:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:05,211 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:32:05,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 55 [2022-11-25 22:32:05,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:05,287 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-25 22:32:05,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 34 treesize of output 46 [2022-11-25 22:32:05,346 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 1 [2022-11-25 22:32:05,488 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:32:05,530 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 [2022-11-25 22:32:05,569 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 [2022-11-25 22:32:05,684 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 14 treesize of output 10 [2022-11-25 22:32:05,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:32:05,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:32:05,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:32:05,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:32:05,844 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 14 treesize of output 10 [2022-11-25 22:32:05,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:32:21,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12843#(and (not (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~owner#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~owner#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (or (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.base|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (or (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 4 (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 1) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:32:21,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:32:21,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:32:21,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-25 22:32:21,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940892338] [2022-11-25 22:32:21,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:32:21,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:32:21,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:32:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:32:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1839, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 22:32:21,426 INFO L87 Difference]: Start difference. First operand 307 states and 360 transitions. Second operand has 19 states, 13 states have (on average 2.769230769230769) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 22:32:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:23,050 INFO L93 Difference]: Finished difference Result 335 states and 388 transitions. [2022-11-25 22:32:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 22:32:23,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 2.769230769230769) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 127 [2022-11-25 22:32:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:23,057 INFO L225 Difference]: With dead ends: 335 [2022-11-25 22:32:23,057 INFO L226 Difference]: Without dead ends: 335 [2022-11-25 22:32:23,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 211 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=308, Invalid=2662, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 22:32:23,059 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 197 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:23,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1127 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:32:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-25 22:32:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 303. [2022-11-25 22:32:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 213 states have (on average 1.539906103286385) internal successors, (328), 284 states have internal predecessors, (328), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:32:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 352 transitions. [2022-11-25 22:32:23,070 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 352 transitions. Word has length 127 [2022-11-25 22:32:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:23,070 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 352 transitions. [2022-11-25 22:32:23,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 2.769230769230769) internal successors, (36), 15 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 22:32:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 352 transitions. [2022-11-25 22:32:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 22:32:23,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:23,073 INFO L195 NwaCegarLoop]: trace histogram [75, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:23,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:32:23,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:32:23,283 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:32:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1327525385, now seen corresponding path program 1 times [2022-11-25 22:32:23,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:23,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881533865] [2022-11-25 22:32:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:23,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:32:23,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861617823] [2022-11-25 22:32:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:23,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:23,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:23,367 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:32:23,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 22:32:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 22:32:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:32:24,292 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 [2022-11-25 22:32:36,982 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:32:36,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 22:32:36,995 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 [2022-11-25 22:32:39,364 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:32:39,364 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 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 22:32:39,688 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 22:32:39,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 22:32:40,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:32:41,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 21 treesize of output 9 [2022-11-25 22:32:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 1312 proven. 1295 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-25 22:32:42,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:32:43,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881533865] [2022-11-25 22:32:43,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:32:43,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861617823] [2022-11-25 22:32:43,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861617823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:43,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2120342702] [2022-11-25 22:32:43,591 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-25 22:32:43,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:32:43,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:32:43,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:32:43,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:32:43,624 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 [2022-11-25 22:32:43,633 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 [2022-11-25 22:32:43,658 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 14 treesize of output 10 [2022-11-25 22:32:43,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:32:43,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:32:43,785 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 197 treesize of output 196 [2022-11-25 22:32:43,799 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 195 treesize of output 194 [2022-11-25 22:32:43,813 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 195 treesize of output 194 [2022-11-25 22:32:43,877 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 14 treesize of output 10 [2022-11-25 22:32:43,885 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 14 treesize of output 10 [2022-11-25 22:32:43,895 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 [2022-11-25 22:32:43,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:32:43,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:32:44,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:32:44,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:32:45,343 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 19 treesize of output 1 [2022-11-25 22:32:45,361 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 13 treesize of output 9 [2022-11-25 22:32:45,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:32:45,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:45,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 22:32:45,512 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 22:32:45,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 22:32:45,533 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 45 treesize of output 1 [2022-11-25 22:32:45,605 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 1 [2022-11-25 22:32:45,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:45,658 INFO L321 Elim1Store]: treesize reduction 53, result has 30.3 percent of original size [2022-11-25 22:32:45,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 75 [2022-11-25 22:32:45,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:45,700 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:32:45,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 59 [2022-11-25 22:32:45,856 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:32:45,929 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 [2022-11-25 22:32:45,956 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 [2022-11-25 22:32:46,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:32:46,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:32:46,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:32:46,149 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 14 treesize of output 10 [2022-11-25 22:32:46,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:32:46,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:32:46,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:42,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13957#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~owner#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~owner#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (< (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (or (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.base|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (or (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 4 (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 1) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:42,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:42,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:33:42,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-11-25 22:33:42,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822590350] [2022-11-25 22:33:42,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:42,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 22:33:42,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:42,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 22:33:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3273, Unknown=4, NotChecked=0, Total=3540 [2022-11-25 22:33:42,701 INFO L87 Difference]: Start difference. First operand 303 states and 352 transitions. Second operand has 32 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 22:33:44,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:33:46,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:33:51,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:33:53,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:33:58,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:34:00,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:34:05,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:34:10,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:34:40,614 WARN L233 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 56 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:35:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:07,685 INFO L93 Difference]: Finished difference Result 336 states and 388 transitions. [2022-11-25 22:35:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:35:07,686 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 127 [2022-11-25 22:35:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:07,688 INFO L225 Difference]: With dead ends: 336 [2022-11-25 22:35:07,688 INFO L226 Difference]: Without dead ends: 336 [2022-11-25 22:35:07,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 198 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 131.8s TimeCoverageRelationStatistics Valid=420, Invalid=5264, Unknown=16, NotChecked=0, Total=5700 [2022-11-25 22:35:07,689 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 391 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 26 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:07,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1629 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2339 Invalid, 8 Unknown, 0 Unchecked, 26.4s Time] [2022-11-25 22:35:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-25 22:35:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 301. [2022-11-25 22:35:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 213 states have (on average 1.5211267605633803) internal successors, (324), 282 states have internal predecessors, (324), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 22:35:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 348 transitions. [2022-11-25 22:35:07,704 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 348 transitions. Word has length 127 [2022-11-25 22:35:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:07,704 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 348 transitions. [2022-11-25 22:35:07,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 22:35:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 348 transitions. [2022-11-25 22:35:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-25 22:35:07,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:07,707 INFO L195 NwaCegarLoop]: trace histogram [75, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:07,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:07,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:35:07,918 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-11-25 22:35:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -834067801, now seen corresponding path program 1 times [2022-11-25 22:35:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:07,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56848017] [2022-11-25 22:35:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:07,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:07,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:35:07,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149618746] [2022-11-25 22:35:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:07,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:07,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:07,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:08,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c917da-e024-4f69-8fc8-a5fe932716ec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 22:35:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-25 22:35:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:14,829 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 [2022-11-25 22:35:29,269 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7680 Int) (v_ArrVal_7681 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_7680)) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_7681) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 22:35:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:29,461 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 [2022-11-25 22:35:29,542 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:35:29,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 22:35:29,745 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7682 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_7682) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-11-25 22:35:29,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:29,910 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 [2022-11-25 22:35:29,920 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:35:29,920 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 [2022-11-25 22:35:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 1141 proven. 430 refuted. 0 times theorem prover too weak. 557 trivial. 1172 not checked. [2022-11-25 22:35:31,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:35,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56848017] [2022-11-25 22:35:35,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:35:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149618746] [2022-11-25 22:35:35,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149618746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962534844] [2022-11-25 22:35:35,772 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-25 22:35:35,772 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:35,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:35,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:35,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:35,805 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 [2022-11-25 22:35:35,812 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 [2022-11-25 22:35:35,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:35:35,928 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 14 treesize of output 10 [2022-11-25 22:35:35,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:35:35,980 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 197 treesize of output 196 [2022-11-25 22:35:35,994 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 195 treesize of output 194 [2022-11-25 22:35:36,012 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 195 treesize of output 194 [2022-11-25 22:35:36,058 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 14 treesize of output 10 [2022-11-25 22:35:36,068 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 14 treesize of output 10 [2022-11-25 22:35:36,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:35:36,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:35:36,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:35:36,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:35:36,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2022-11-25 22:35:37,454 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 19 treesize of output 1 [2022-11-25 22:35:37,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:35:37,512 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 13 treesize of output 9 [2022-11-25 22:35:37,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:37,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 92 [2022-11-25 22:35:37,641 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-25 22:35:37,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 88 [2022-11-25 22:35:37,662 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 45 treesize of output 1 [2022-11-25 22:35:37,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:37,759 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 22:35:37,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 75 [2022-11-25 22:35:37,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:37,814 INFO L321 Elim1Store]: treesize reduction 53, result has 30.3 percent of original size [2022-11-25 22:35:37,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 85 [2022-11-25 22:35:37,851 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 1 [2022-11-25 22:35:37,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:37,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:37,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:37,995 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 22:35:37,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 78 [2022-11-25 22:35:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:38,046 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-25 22:35:38,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 65 [2022-11-25 22:35:38,090 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 19 treesize of output 1 [2022-11-25 22:35:38,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 1 [2022-11-25 22:35:38,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:38,266 INFO L321 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2022-11-25 22:35:38,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 110 treesize of output 105 [2022-11-25 22:35:38,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:38,406 INFO L321 Elim1Store]: treesize reduction 50, result has 53.3 percent of original size [2022-11-25 22:35:38,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 64 treesize of output 104 [2022-11-25 22:35:38,466 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 22:35:38,480 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 22:35:38,535 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 22:35:38,656 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-11-25 22:35:38,692 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 [2022-11-25 22:35:38,720 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 [2022-11-25 22:35:38,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:35:38,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:35:38,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:35:38,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:35:38,977 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 [2022-11-25 22:35:38,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 22:35:39,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:32,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15112#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 8 |ULTIMATE.start_l4_insert_~owner#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 4 |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~owner#1.offset| 4) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= 4 |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~owner#1.offset| 8) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (< (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12)) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |~#list~0.offset| 0))' at error location [2022-11-25 22:36:32,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:32,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:36:32,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-11-25 22:36:32,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305687390] [2022-11-25 22:36:32,114 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:32,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 22:36:32,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 22:36:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=3864, Unknown=8, NotChecked=254, Total=4422 [2022-11-25 22:36:32,117 INFO L87 Difference]: Start difference. First operand 301 states and 348 transitions. Second operand has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:36:34,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:36,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:38,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:40,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:43,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:45,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:47,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:49,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:54,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:36:58,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:37:00,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:37:02,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:37:04,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:37:06,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:37:08,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:37:13,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:37:15,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 22:37:17,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]