./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:36:05,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:36:05,353 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 15:36:05,358 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:36:05,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:36:05,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:36:05,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:36:05,382 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:36:05,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:36:05,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:36:05,384 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:36:05,384 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:36:05,385 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:36:05,385 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:36:05,386 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:36:05,386 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:36:05,387 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:36:05,387 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:36:05,388 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:36:05,388 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:36:05,389 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:36:05,390 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:36:05,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 15:36:05,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 15:36:05,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:36:05,392 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:36:05,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:36:05,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:36:05,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:36:05,393 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 15:36:05,394 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 15:36:05,394 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 15:36:05,394 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:36:05,395 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 15:36:05,395 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:36:05,395 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:36:05,395 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:36:05,395 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:36:05,396 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:36:05,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:36:05,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:36:05,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:36:05,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:36:05,397 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:36:05,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:36:05,397 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:36:05,397 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:36:05,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:36:05,398 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2023-12-02 15:36:05,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:36:05,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:36:05,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:36:05,637 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:36:05,637 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:36:05,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety/test-0235-2.i [2023-12-02 15:36:08,412 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:36:08,629 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:36:08,629 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/sv-benchmarks/c/memsafety/test-0235-2.i [2023-12-02 15:36:08,645 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/data/260f6768b/1713b85507a34af093373606966f8795/FLAG9b69a60f7 [2023-12-02 15:36:08,659 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/data/260f6768b/1713b85507a34af093373606966f8795 [2023-12-02 15:36:08,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:36:08,663 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:36:08,664 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:36:08,664 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:36:08,669 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:36:08,670 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:36:08" (1/1) ... [2023-12-02 15:36:08,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fc330a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:08, skipping insertion in model container [2023-12-02 15:36:08,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:36:08" (1/1) ... [2023-12-02 15:36:08,719 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:36:09,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:36:09,018 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:36:09,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:36:09,103 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:36:09,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09 WrapperNode [2023-12-02 15:36:09,103 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:36:09,105 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:36:09,105 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:36:09,105 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:36:09,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,158 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 246 [2023-12-02 15:36:09,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:36:09,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:36:09,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:36:09,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:36:09,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,181 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,185 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:36:09,192 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:36:09,193 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:36:09,193 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:36:09,193 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (1/1) ... [2023-12-02 15:36:09,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:36:09,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:09,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:36:09,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:36:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 15:36:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:36:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 15:36:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 15:36:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-12-02 15:36:09,256 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-12-02 15:36:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:36:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 15:36:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-12-02 15:36:09,257 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-12-02 15:36:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:36:09,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:36:09,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:36:09,396 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:36:09,398 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:36:09,914 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:36:09,988 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:36:09,988 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-02 15:36:09,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:36:09 BoogieIcfgContainer [2023-12-02 15:36:09,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:36:09,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:36:09,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:36:09,996 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:36:09,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:36:08" (1/3) ... [2023-12-02 15:36:09,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad4ac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:36:09, skipping insertion in model container [2023-12-02 15:36:09,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:36:09" (2/3) ... [2023-12-02 15:36:09,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad4ac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:36:09, skipping insertion in model container [2023-12-02 15:36:09,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:36:09" (3/3) ... [2023-12-02 15:36:09,999 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2023-12-02 15:36:10,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:36:10,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-12-02 15:36:10,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:36:10,067 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;@2b5c804b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:36:10,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-12-02 15:36:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 104 states have (on average 2.1346153846153846) internal successors, (222), 191 states have internal predecessors, (222), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 15:36:10,077 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:10,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 15:36:10,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:36:10,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash 463072, now seen corresponding path program 1 times [2023-12-02 15:36:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:10,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101531048] [2023-12-02 15:36:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:10,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:36:10,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:10,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101531048] [2023-12-02 15:36:10,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101531048] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:10,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:10,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:36:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905121615] [2023-12-02 15:36:10,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:10,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 15:36:10,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 15:36:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 15:36:10,252 INFO L87 Difference]: Start difference. First operand has 206 states, 104 states have (on average 2.1346153846153846) internal successors, (222), 191 states have internal predecessors, (222), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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) [2023-12-02 15:36:10,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:10,334 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2023-12-02 15:36:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 15:36:10,337 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 [2023-12-02 15:36:10,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:10,347 INFO L225 Difference]: With dead ends: 206 [2023-12-02 15:36:10,348 INFO L226 Difference]: Without dead ends: 205 [2023-12-02 15:36:10,349 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 [2023-12-02 15:36:10,353 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:10,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:36:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-12-02 15:36:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-12-02 15:36:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 190 states have internal predecessors, (211), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 235 transitions. [2023-12-02 15:36:10,400 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 235 transitions. Word has length 3 [2023-12-02 15:36:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:10,401 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 235 transitions. [2023-12-02 15:36:10,401 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) [2023-12-02 15:36:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 235 transitions. [2023-12-02 15:36:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:36:10,402 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:10,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 15:36:10,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:36:10,402 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)] === [2023-12-02 15:36:10,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 441106740, now seen corresponding path program 1 times [2023-12-02 15:36:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:10,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454390048] [2023-12-02 15:36:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:10,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:10,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149592372] [2023-12-02 15:36:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:10,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:10,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:10,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:10,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:36:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:10,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:36:10,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:10,566 INFO L378 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 [2023-12-02 15:36:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:36:10,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:36:10,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454390048] [2023-12-02 15:36:10,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149592372] [2023-12-02 15:36:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149592372] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:10,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:36:10,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728651859] [2023-12-02 15:36:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:10,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:36:10,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:36:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:36:10,580 INFO L87 Difference]: Start difference. First operand 205 states and 235 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) [2023-12-02 15:36:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:10,737 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2023-12-02 15:36:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:36:10,737 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 [2023-12-02 15:36:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:10,739 INFO L225 Difference]: With dead ends: 204 [2023-12-02 15:36:10,740 INFO L226 Difference]: Without dead ends: 204 [2023-12-02 15:36:10,740 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 [2023-12-02 15:36:10,741 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 4 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:10,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 355 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:36:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-12-02 15:36:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-12-02 15:36:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 104 states have (on average 2.019230769230769) internal successors, (210), 189 states have internal predecessors, (210), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 234 transitions. [2023-12-02 15:36:10,760 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 234 transitions. Word has length 5 [2023-12-02 15:36:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:10,760 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 234 transitions. [2023-12-02 15:36:10,761 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) [2023-12-02 15:36:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 234 transitions. [2023-12-02 15:36:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 15:36:10,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:10,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 15:36:10,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:36:10,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:10,967 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)] === [2023-12-02 15:36:10,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:10,967 INFO L85 PathProgramCache]: Analyzing trace with hash 789407478, now seen corresponding path program 1 times [2023-12-02 15:36:10,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:10,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010147813] [2023-12-02 15:36:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:10,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:10,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:10,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485400023] [2023-12-02 15:36:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:10,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:10,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:10,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:36:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:11,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:36:11,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:11,107 INFO L378 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 [2023-12-02 15:36:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:36:11,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:36:11,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:11,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010147813] [2023-12-02 15:36:11,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:11,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485400023] [2023-12-02 15:36:11,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485400023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:11,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:11,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:36:11,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726292169] [2023-12-02 15:36:11,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:11,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:36:11,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:36:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:36:11,138 INFO L87 Difference]: Start difference. First operand 204 states and 234 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) [2023-12-02 15:36:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:11,357 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2023-12-02 15:36:11,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:36:11,358 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 [2023-12-02 15:36:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:11,360 INFO L225 Difference]: With dead ends: 209 [2023-12-02 15:36:11,360 INFO L226 Difference]: Without dead ends: 209 [2023-12-02 15:36:11,360 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 [2023-12-02 15:36:11,361 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:11,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 557 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:36:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-12-02 15:36:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-12-02 15:36:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 193 states have internal predecessors, (215), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2023-12-02 15:36:11,378 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 6 [2023-12-02 15:36:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:11,379 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2023-12-02 15:36:11,379 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) [2023-12-02 15:36:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2023-12-02 15:36:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 15:36:11,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:11,381 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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] [2023-12-02 15:36:11,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:36:11,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:11,586 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)] === [2023-12-02 15:36:11,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash -558133097, now seen corresponding path program 1 times [2023-12-02 15:36:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098959234] [2023-12-02 15:36:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:11,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:11,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254330046] [2023-12-02 15:36:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:11,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:11,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:11,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:36:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:11,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:36:11,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:11,866 INFO L378 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 [2023-12-02 15:36:11,967 INFO L378 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 [2023-12-02 15:36:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 15:36:12,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:36:12,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:12,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098959234] [2023-12-02 15:36:12,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:12,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254330046] [2023-12-02 15:36:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254330046] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:12,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:12,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:36:12,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284436916] [2023-12-02 15:36:12,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:12,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:36:12,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:12,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:36:12,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:36:12,073 INFO L87 Difference]: Start difference. First operand 209 states and 239 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:36:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:12,468 INFO L93 Difference]: Finished difference Result 213 states and 243 transitions. [2023-12-02 15:36:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:36:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2023-12-02 15:36:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:12,470 INFO L225 Difference]: With dead ends: 213 [2023-12-02 15:36:12,470 INFO L226 Difference]: Without dead ends: 211 [2023-12-02 15:36:12,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:36:12,472 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 4 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:12,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 762 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:36:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-12-02 15:36:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-12-02 15:36:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 195 states have internal predecessors, (217), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 241 transitions. [2023-12-02 15:36:12,485 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 241 transitions. Word has length 45 [2023-12-02 15:36:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:12,486 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 241 transitions. [2023-12-02 15:36:12,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:36:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 241 transitions. [2023-12-02 15:36:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 15:36:12,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:12,488 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] [2023-12-02 15:36:12,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:36:12,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:12,694 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)] === [2023-12-02 15:36:12,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2129494279, now seen corresponding path program 1 times [2023-12-02 15:36:12,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:12,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242208835] [2023-12-02 15:36:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:12,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:12,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:12,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772688478] [2023-12-02 15:36:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:12,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:12,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:12,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:12,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:36:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:13,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 15:36:13,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:13,054 INFO L378 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 1 [2023-12-02 15:36:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 15:36:13,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:36:13,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:13,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242208835] [2023-12-02 15:36:13,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772688478] [2023-12-02 15:36:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772688478] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:13,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:13,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:36:13,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700087661] [2023-12-02 15:36:13,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:13,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:36:13,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:13,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:36:13,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:36:13,082 INFO L87 Difference]: Start difference. First operand 211 states and 241 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 15:36:13,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:13,249 INFO L93 Difference]: Finished difference Result 210 states and 240 transitions. [2023-12-02 15:36:13,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:36:13,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 50 [2023-12-02 15:36:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:13,252 INFO L225 Difference]: With dead ends: 210 [2023-12-02 15:36:13,252 INFO L226 Difference]: Without dead ends: 210 [2023-12-02 15:36:13,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:36:13,253 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 7 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:13,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 571 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:36:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-12-02 15:36:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-12-02 15:36:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 194 states have internal predecessors, (216), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2023-12-02 15:36:13,265 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 50 [2023-12-02 15:36:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:13,265 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2023-12-02 15:36:13,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 15:36:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2023-12-02 15:36:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 15:36:13,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:13,267 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] [2023-12-02 15:36:13,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:36:13,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:13,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:36:13,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1507633510, now seen corresponding path program 1 times [2023-12-02 15:36:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395681554] [2023-12-02 15:36:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:13,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:13,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271430698] [2023-12-02 15:36:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:13,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:13,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:13,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:36:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:13,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 15:36:13,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:13,785 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-12-02 15:36:13,811 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 15:36:13,811 INFO L378 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 [2023-12-02 15:36:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 6 not checked. [2023-12-02 15:36:13,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:36:14,048 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 15:36:14,049 INFO L378 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 [2023-12-02 15:36:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 15:36:14,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:14,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395681554] [2023-12-02 15:36:14,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271430698] [2023-12-02 15:36:14,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271430698] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:36:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562523167] [2023-12-02 15:36:14,089 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 15:36:14,089 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:36:14,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:36:14,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:36:14,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:36:17,574 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-12-02 15:36:17,806 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:36:17,815 WARN L876 $PredicateComparison]: unable to prove that (and (= 3 |c_ULTIMATE.start_l0_insert_~list#1.base|) (= |c_ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (let ((.cse0 (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_44| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_44| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| 4294967296))))) (.cse1 (= |c_ULTIMATE.start_l4_insert_#in~list#1.base| |c_ULTIMATE.start_l3_insert_~item~1#1.base|)) (.cse2 (not (= 0 |c_ULTIMATE.start_l3_insert_~item~1#1.base|))) (.cse3 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse4 (= |c_ULTIMATE.start_l2_insert_~item~2#1.base| |c_ULTIMATE.start_l3_insert_#in~list#1.base|)) (.cse5 (= |c_ULTIMATE.start_l2_insert_~list#1.base| |c_ULTIMATE.start_l2_insert_#in~list#1.base|)) (.cse6 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse7 (= |c_ULTIMATE.start_l1_insert_~list#1.base| |c_ULTIMATE.start_l1_insert_#in~list#1.base|)) (.cse8 (not (= |c_ULTIMATE.start_l0_insert_~item~4#1.base| 0))) (.cse9 (not (= |c_ULTIMATE.start_l1_insert_~item~3#1.base| 0))) (.cse10 (= |c_ULTIMATE.start_l3_insert_#in~list#1.base| |c_ULTIMATE.start_l3_insert_~list#1.base|)) (.cse11 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse12 (not (= |c_ULTIMATE.start_l4_insert_~item~0#1.base| 0))) (.cse13 (not (= |c_ULTIMATE.start_l4_insert_#t~ret7#1.base| 0))) (.cse14 (not (= |c_ULTIMATE.start_l2_insert_~item~2#1.base| 0))) (.cse15 (= |c_ULTIMATE.start_l1_insert_#in~list#1.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|)) (.cse16 (= (select |c_ULTIMATE.start_main_old_#valid#1| 3) 1)) (.cse18 (= |c_ULTIMATE.start_l2_insert_#in~list#1.base| |c_ULTIMATE.start_l1_insert_~item~3#1.base|)) (.cse19 (= |c_ULTIMATE.start_l4_insert_#in~list#1.base| |c_ULTIMATE.start_l4_insert_~list#1.base|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_2| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_2| 3) 0) 0)) .cse10 .cse11 .cse12 .cse13 (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_2| 3) 4) (= (select |v_#length_BEFORE_CALL_2| 2) 14) (= (select |v_#length_BEFORE_CALL_2| 1) 2))) .cse14 .cse15 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_2| 3) 0) 0)) .cse16 (exists ((|v_#memory_int_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse17 (select |v_#memory_int_BEFORE_CALL_2| 1))) (and (= (select .cse17 0) 48) (= (select .cse17 1) 0)))) .cse18 .cse19) (and (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_4| 1)) (= (select |v_#length_BEFORE_CALL_4| 3) 4) (= 14 (select |v_#length_BEFORE_CALL_4| 2)))) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_4| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_4| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_4| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_4| 3) 0) 0)) .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 (exists ((|v_#memory_int_BEFORE_CALL_4| (Array Int (Array Int Int)))) (let ((.cse20 (select |v_#memory_int_BEFORE_CALL_4| 1))) (and (= (select .cse20 1) 0) (= 48 (select .cse20 0))))) .cse18 .cse19))) (= |c_ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (= |c_ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (= |c_ULTIMATE.start_l0_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.base| 3) (= 3 |c_~#list~0.base|) (= |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |c_ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (not (= (select |c_#valid| |c_ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |c_ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= 4 |c_ULTIMATE.start_l3_insert_~list#1.offset|)) is different from true [2023-12-02 15:36:23,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2950#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (or (and (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_4| 1)) (= (select |v_#length_BEFORE_CALL_4| 3) 4) (= 14 (select |v_#length_BEFORE_CALL_4| 2)))) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_44| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_44| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| 4294967296)))) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |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)) (= (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|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (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)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_4| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_4| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_4| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_4| 3) 0) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_int_BEFORE_CALL_4| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_4| 1) 1) 0) (= 48 (select (select |v_#memory_int_BEFORE_CALL_4| 1) 0))))) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_44| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_44| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_55| 4294967296)))) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_2| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_2| 3) 0) 0)) (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_2| 3) 4) (= (select |v_#length_BEFORE_CALL_2| 2) 14) (= (select |v_#length_BEFORE_CALL_2| 1) 2))) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_2| 3) 0) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (exists ((|v_#memory_int_BEFORE_CALL_2| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_2| 1) 0) 48) (= (select (select |v_#memory_int_BEFORE_CALL_2| 1) 1) 0))) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|))) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0))' at error location [2023-12-02 15:36:23,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:36:23,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:36:23,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2023-12-02 15:36:23,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572852390] [2023-12-02 15:36:23,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:36:23,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:36:23,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:23,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:36:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=855, Unknown=4, NotChecked=122, Total=1122 [2023-12-02 15:36:23,527 INFO L87 Difference]: Start difference. First operand 210 states and 240 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) [2023-12-02 15:36:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:24,030 INFO L93 Difference]: Finished difference Result 300 states and 350 transitions. [2023-12-02 15:36:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:36:24,031 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 [2023-12-02 15:36:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:24,034 INFO L225 Difference]: With dead ends: 300 [2023-12-02 15:36:24,035 INFO L226 Difference]: Without dead ends: 300 [2023-12-02 15:36:24,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=153, Invalid=973, Unknown=4, NotChecked=130, Total=1260 [2023-12-02 15:36:24,036 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 217 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:24,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1112 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 685 Invalid, 0 Unknown, 339 Unchecked, 0.4s Time] [2023-12-02 15:36:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-12-02 15:36:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 208. [2023-12-02 15:36:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 110 states have (on average 1.9454545454545455) internal successors, (214), 192 states have internal predecessors, (214), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 238 transitions. [2023-12-02 15:36:24,048 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 238 transitions. Word has length 54 [2023-12-02 15:36:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:24,049 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 238 transitions. [2023-12-02 15:36:24,049 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) [2023-12-02 15:36:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 238 transitions. [2023-12-02 15:36:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 15:36:24,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:24,050 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] [2023-12-02 15:36:24,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:36:24,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:24,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:36:24,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1507633509, now seen corresponding path program 1 times [2023-12-02 15:36:24,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:24,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196329095] [2023-12-02 15:36:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:24,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:24,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:24,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532651050] [2023-12-02 15:36:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:24,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:24,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:24,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:36:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:24,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 15:36:24,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:24,563 INFO L378 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 1 [2023-12-02 15:36:24,584 INFO L378 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 [2023-12-02 15:36:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 67 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 15:36:24,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:36:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 15:36:24,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:24,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196329095] [2023-12-02 15:36:24,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:24,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532651050] [2023-12-02 15:36:24,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532651050] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:36:24,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396109070] [2023-12-02 15:36:24,851 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 15:36:24,851 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:36:24,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:36:24,852 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:36:24,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:36:27,811 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-12-02 15:36:27,996 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:36:33,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3814#(and (or (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_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |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)) (= (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|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (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)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_int_BEFORE_CALL_34| (Array Int (Array Int Int)))) (and (= 48 (select (select |v_#memory_int_BEFORE_CALL_34| 1) 0)) (= (select (select |v_#memory_int_BEFORE_CALL_34| 1) 1) 0))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_34| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_34| 3) 0) 0)) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_68| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_93| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_68| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_93| 4294967296)) (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_93|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_93| 0)))) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_34| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_34| 3) 0) 0)) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#length_BEFORE_CALL_34| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_34| 3) 4) (= (select |v_#length_BEFORE_CALL_34| 2) 14) (= 2 (select |v_#length_BEFORE_CALL_34| 1))))) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (exists ((|v_#length_BEFORE_CALL_32| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_32| 1)) (= (select |v_#length_BEFORE_CALL_32| 2) 14) (= 4 (select |v_#length_BEFORE_CALL_32| 3)))) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_32| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_32| 3) 0) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_68| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_93| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_68| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_93| 4294967296)) (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_93|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_93| 0)))) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_32| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_32| 3) 0) 0)) (= |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|) (exists ((|v_#memory_int_BEFORE_CALL_32| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_32| 1) 1) 0) (= (select (select |v_#memory_int_BEFORE_CALL_32| 1) 0) 48))))) (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) 7) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0))' at error location [2023-12-02 15:36:33,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:36:33,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:36:33,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-12-02 15:36:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415287137] [2023-12-02 15:36:33,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:36:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:36:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:36:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=889, Unknown=7, NotChecked=0, Total=1056 [2023-12-02 15:36:33,875 INFO L87 Difference]: Start difference. First operand 208 states and 238 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, (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) [2023-12-02 15:36:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:34,207 INFO L93 Difference]: Finished difference Result 218 states and 250 transitions. [2023-12-02 15:36:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:36:34,208 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, (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 54 [2023-12-02 15:36:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:34,210 INFO L225 Difference]: With dead ends: 218 [2023-12-02 15:36:34,210 INFO L226 Difference]: Without dead ends: 214 [2023-12-02 15:36:34,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=191, Invalid=1134, Unknown=7, NotChecked=0, Total=1332 [2023-12-02 15:36:34,211 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 6 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:34,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1112 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:36:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-12-02 15:36:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-12-02 15:36:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 116 states have (on average 1.896551724137931) internal successors, (220), 198 states have internal predecessors, (220), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2023-12-02 15:36:34,221 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 54 [2023-12-02 15:36:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:34,221 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2023-12-02 15:36:34,222 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, (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) [2023-12-02 15:36:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2023-12-02 15:36:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 15:36:34,223 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:34,223 INFO L195 NwaCegarLoop]: trace histogram [24, 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] [2023-12-02 15:36:34,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 15:36:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:34,431 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)] === [2023-12-02 15:36:34,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash -898988519, now seen corresponding path program 2 times [2023-12-02 15:36:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:34,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768560843] [2023-12-02 15:36:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:34,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:34,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665542665] [2023-12-02 15:36:34,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:36:34,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:34,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:34,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:34,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:36:34,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 15:36:34,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:36:34,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:36:34,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:34,879 INFO L378 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 1 [2023-12-02 15:36:34,895 INFO L378 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 [2023-12-02 15:36:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 140 proven. 10 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-12-02 15:36:34,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:36:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 140 proven. 10 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-12-02 15:36:35,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:35,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768560843] [2023-12-02 15:36:35,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:35,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665542665] [2023-12-02 15:36:35,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665542665] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:36:35,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1471543583] [2023-12-02 15:36:35,271 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 15:36:35,271 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:36:35,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:36:35,271 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:36:35,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:36:35,952 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-12-02 15:36:36,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:36:37,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4718#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (< (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) 0)))' at error location [2023-12-02 15:36:37,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:36:37,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:36:37,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-12-02 15:36:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696041300] [2023-12-02 15:36:37,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:36:37,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 15:36:37,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:37,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 15:36:37,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-12-02 15:36:37,078 INFO L87 Difference]: Start difference. First operand 214 states and 244 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) [2023-12-02 15:36:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:38,071 INFO L93 Difference]: Finished difference Result 224 states and 258 transitions. [2023-12-02 15:36:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 15:36:38,072 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 72 [2023-12-02 15:36:38,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:38,074 INFO L225 Difference]: With dead ends: 224 [2023-12-02 15:36:38,074 INFO L226 Difference]: Without dead ends: 221 [2023-12-02 15:36:38,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 182 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 15:36:38,075 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 35 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:38,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1698 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:36:38,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-12-02 15:36:38,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-12-02 15:36:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 123 states have (on average 1.8455284552845528) internal successors, (227), 205 states have internal predecessors, (227), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 251 transitions. [2023-12-02 15:36:38,085 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 251 transitions. Word has length 72 [2023-12-02 15:36:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:38,085 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 251 transitions. [2023-12-02 15:36:38,086 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) [2023-12-02 15:36:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 251 transitions. [2023-12-02 15:36:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:36:38,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:38,087 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] [2023-12-02 15:36:38,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:36:38,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:38,294 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)] === [2023-12-02 15:36:38,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash 207704567, now seen corresponding path program 3 times [2023-12-02 15:36:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:38,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047045457] [2023-12-02 15:36:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:38,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:38,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:38,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785703847] [2023-12-02 15:36:38,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:36:38,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:38,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:38,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:38,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:36:40,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:36:40,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:36:40,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-02 15:36:40,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:40,173 INFO L378 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 1 [2023-12-02 15:36:40,191 INFO L378 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 [2023-12-02 15:36:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 532 proven. 115 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2023-12-02 15:36:40,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:36:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 117 proven. 123 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2023-12-02 15:36:40,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:40,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047045457] [2023-12-02 15:36:40,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:40,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785703847] [2023-12-02 15:36:40,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785703847] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:36:40,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687951853] [2023-12-02 15:36:40,636 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 15:36:40,637 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:36:40,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:36:40,637 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:36:40,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:36:41,294 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-12-02 15:36:41,458 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:36:42,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5722#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (< (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) 0)))' at error location [2023-12-02 15:36:42,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:36:42,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:36:42,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2023-12-02 15:36:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404687908] [2023-12-02 15:36:42,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:36:42,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 15:36:42,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 15:36:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 15:36:42,615 INFO L87 Difference]: Start difference. First operand 221 states and 251 transitions. Second operand has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 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) [2023-12-02 15:36:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:43,167 INFO L93 Difference]: Finished difference Result 226 states and 257 transitions. [2023-12-02 15:36:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:36:43,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 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 83 [2023-12-02 15:36:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:43,169 INFO L225 Difference]: With dead ends: 226 [2023-12-02 15:36:43,169 INFO L226 Difference]: Without dead ends: 224 [2023-12-02 15:36:43,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 208 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 15:36:43,171 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 14 mSDsluCounter, 2762 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2967 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:43,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2967 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:36:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-12-02 15:36:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2023-12-02 15:36:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 126 states have (on average 1.8253968253968254) internal successors, (230), 208 states have internal predecessors, (230), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:36:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 254 transitions. [2023-12-02 15:36:43,179 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 254 transitions. Word has length 83 [2023-12-02 15:36:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:43,179 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 254 transitions. [2023-12-02 15:36:43,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 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) [2023-12-02 15:36:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 254 transitions. [2023-12-02 15:36:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 15:36:43,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:43,181 INFO L195 NwaCegarLoop]: trace histogram [50, 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] [2023-12-02 15:36:43,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 15:36:43,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:43,390 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)] === [2023-12-02 15:36:43,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash -140146791, now seen corresponding path program 4 times [2023-12-02 15:36:43,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:43,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742550614] [2023-12-02 15:36:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:43,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:43,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:43,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182945500] [2023-12-02 15:36:43,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:36:43,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:43,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:43,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:36:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:47,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 15:36:47,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:47,279 INFO L378 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 1 [2023-12-02 15:36:50,185 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:36:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:36:50,248 INFO L378 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 18 treesize of output 13 [2023-12-02 15:36:50,255 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 15:36:50,255 INFO L378 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 [2023-12-02 15:36:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 616 proven. 316 refuted. 0 times theorem prover too weak. 489 trivial. 179 not checked. [2023-12-02 15:36:50,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:36:50,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742550614] [2023-12-02 15:36:50,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182945500] [2023-12-02 15:36:50,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182945500] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:36:50,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1933893612] [2023-12-02 15:36:50,458 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 15:36:50,458 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:36:50,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:36:50,458 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:36:50,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:36:51,169 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-12-02 15:36:51,312 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:37:04,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6525#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (< (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) 0)))' at error location [2023-12-02 15:37:04,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:37:04,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:37:04,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-02 15:37:04,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521893508] [2023-12-02 15:37:04,966 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:37:04,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 15:37:04,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:37:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 15:37:04,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1375, Unknown=3, NotChecked=74, Total=1560 [2023-12-02 15:37:04,968 INFO L87 Difference]: Start difference. First operand 224 states and 254 transitions. Second operand has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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) [2023-12-02 15:37:06,989 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] [2023-12-02 15:37:09,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:13,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:15,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:17,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:19,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:23,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:25,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:27,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:31,795 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] [2023-12-02 15:37:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:37:33,578 INFO L93 Difference]: Finished difference Result 314 states and 364 transitions. [2023-12-02 15:37:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 15:37:33,579 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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 98 [2023-12-02 15:37:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:37:33,582 INFO L225 Difference]: With dead ends: 314 [2023-12-02 15:37:33,582 INFO L226 Difference]: Without dead ends: 314 [2023-12-02 15:37:33,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 153 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=189, Invalid=2359, Unknown=6, NotChecked=98, Total=2652 [2023-12-02 15:37:33,584 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 128 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 13 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:37:33,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1013 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2521 Invalid, 10 Unknown, 336 Unchecked, 21.9s Time] [2023-12-02 15:37:33,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-02 15:37:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 222. [2023-12-02 15:37:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 126 states have (on average 1.8095238095238095) internal successors, (228), 206 states have internal predecessors, (228), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:37:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2023-12-02 15:37:33,595 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 98 [2023-12-02 15:37:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:37:33,595 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2023-12-02 15:37:33,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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) [2023-12-02 15:37:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2023-12-02 15:37:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 15:37:33,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:37:33,597 INFO L195 NwaCegarLoop]: trace histogram [50, 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] [2023-12-02 15:37:33,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:37:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 15:37:33,798 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:37:33,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:37:33,798 INFO L85 PathProgramCache]: Analyzing trace with hash -49570600, now seen corresponding path program 1 times [2023-12-02 15:37:33,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:37:33,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299590663] [2023-12-02 15:37:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:37:33,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:37:33,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:37:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234915563] [2023-12-02 15:37:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:37:33,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:37:33,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:37:33,846 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:37:33,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:37:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:37:34,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 15:37:34,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:37:34,271 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-12-02 15:37:34,294 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 15:37:34,295 INFO L378 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 [2023-12-02 15:37:34,340 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 15:37:34,341 INFO L378 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 [2023-12-02 15:37:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 818 proven. 2 refuted. 0 times theorem prover too weak. 596 trivial. 184 not checked. [2023-12-02 15:37:34,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:37:34,672 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 15:37:34,673 INFO L378 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 [2023-12-02 15:37:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 818 proven. 186 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2023-12-02 15:37:34,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:37:34,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299590663] [2023-12-02 15:37:34,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:37:34,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234915563] [2023-12-02 15:37:34,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234915563] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:37:34,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026386380] [2023-12-02 15:37:34,686 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:37:34,686 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:37:34,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:37:34,687 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:37:34,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:37:35,388 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-12-02 15:37:35,549 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:37:36,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7698#(and (not (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= 0 (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (exists ((|v_#memory_int_368| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_368| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_int_368| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))))) (exists ((|v_#memory_$Pointer$.base_410| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_410| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_$Pointer$.base_410| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))))) (exists ((|v_#memory_$Pointer$.offset_410| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_410| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_$Pointer$.offset_410| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))))))' at error location [2023-12-02 15:37:36,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:37:36,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:37:36,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-12-02 15:37:36,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073667091] [2023-12-02 15:37:36,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:37:36,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:37:36,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:37:36,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:37:36,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=535, Unknown=1, NotChecked=46, Total=650 [2023-12-02 15:37:36,749 INFO L87 Difference]: Start difference. First operand 222 states and 252 transitions. Second operand has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:37:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:37:37,252 INFO L93 Difference]: Finished difference Result 311 states and 361 transitions. [2023-12-02 15:37:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:37:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 99 [2023-12-02 15:37:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:37:37,255 INFO L225 Difference]: With dead ends: 311 [2023-12-02 15:37:37,255 INFO L226 Difference]: Without dead ends: 311 [2023-12-02 15:37:37,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 258 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=84, Invalid=675, Unknown=1, NotChecked=52, Total=812 [2023-12-02 15:37:37,256 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 128 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:37:37,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1189 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 776 Invalid, 0 Unknown, 334 Unchecked, 0.4s Time] [2023-12-02 15:37:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-12-02 15:37:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 219. [2023-12-02 15:37:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 126 states have (on average 1.7857142857142858) internal successors, (225), 203 states have internal predecessors, (225), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:37:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 249 transitions. [2023-12-02 15:37:37,263 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 249 transitions. Word has length 99 [2023-12-02 15:37:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:37:37,264 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 249 transitions. [2023-12-02 15:37:37,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:37:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 249 transitions. [2023-12-02 15:37:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 15:37:37,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:37:37,265 INFO L195 NwaCegarLoop]: trace histogram [50, 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] [2023-12-02 15:37:37,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:37:37,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:37:37,466 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:37:37,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:37:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash -49570599, now seen corresponding path program 1 times [2023-12-02 15:37:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:37:37,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831804076] [2023-12-02 15:37:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:37:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:37:37,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:37:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266605436] [2023-12-02 15:37:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:37:37,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:37:37,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:37:37,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:37:37,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:37:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:37:49,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-02 15:37:49,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:37:49,725 INFO L378 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 1 [2023-12-02 15:37:52,953 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:37:53,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:37:53,025 INFO L378 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 18 treesize of output 13 [2023-12-02 15:37:53,040 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:37:53,041 INFO L378 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 [2023-12-02 15:37:53,205 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:37:53,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:37:53,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 15:37:53,280 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 15:37:53,280 INFO L378 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 [2023-12-02 15:37:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 678 proven. 194 refuted. 0 times theorem prover too weak. 341 trivial. 387 not checked. [2023-12-02 15:37:53,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:37:53,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:37:53,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831804076] [2023-12-02 15:37:53,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:37:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266605436] [2023-12-02 15:37:53,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266605436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:37:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872414993] [2023-12-02 15:37:53,580 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 15:37:53,580 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:37:53,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:37:53,581 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:37:53,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:37:55,807 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-12-02 15:37:55,994 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:38:01,098 WARN L876 $PredicateComparison]: unable to prove that (and (= 3 |c_ULTIMATE.start_l0_insert_~list#1.base|) (<= 1 |c_#StackHeapBarrier|) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_l0_insert_~list#1.offset| 0) (let ((.cse0 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse1 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse2 (not (= |c_ULTIMATE.start_l0_insert_~item~4#1.base| 0))) (.cse3 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse5 (= (select |c_ULTIMATE.start_main_old_#valid#1| 3) 1)) (.cse6 (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_152| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_152| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| 4294967296)) (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| 0)))))) (or (and .cse0 .cse1 .cse2 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_182| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_182| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_182| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_182| 3) 0) 0)) .cse3 (exists ((|v_old(#memory_int)_AFTER_CALL_125| (Array Int (Array Int Int)))) (let ((.cse4 (select |v_old(#memory_int)_AFTER_CALL_125| 1))) (and (= (select .cse4 0) 48) (= (select .cse4 1) 0)))) .cse5 (exists ((|v_#length_BEFORE_CALL_188| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_188| 1) 2) (= 14 (select |v_#length_BEFORE_CALL_188| 2)) (= (select |v_#length_BEFORE_CALL_188| 3) 4))) .cse6) (and (exists ((|v_#length_BEFORE_CALL_190| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_190| 1)) (= (select |v_#length_BEFORE_CALL_190| 2) 14) (= 4 (select |v_#length_BEFORE_CALL_190| 3)))) .cse0 (exists ((|v_old(#memory_int)_AFTER_CALL_126| (Array Int (Array Int Int)))) (let ((.cse7 (select |v_old(#memory_int)_AFTER_CALL_126| 1))) (and (= (select .cse7 1) 0) (= (select .cse7 0) 48)))) .cse1 .cse2 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_184| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_184| 3) 0) 0)) .cse3 (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_184| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_184| 3) 0) 0)) .cse5 .cse6))) (= |c_ULTIMATE.start_l0_insert_#in~list#1.base| 3) (= 3 |c_~#list~0.base|) (= |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.offset| 0)) is different from true [2023-12-02 15:38:14,465 WARN L876 $PredicateComparison]: unable to prove that (and (= 3 |c_ULTIMATE.start_l0_insert_~list#1.base|) (= |c_ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (= |c_ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (= |c_ULTIMATE.start_l0_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.base| 3) (= 3 |c_~#list~0.base|) (= |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= 4 |c_ULTIMATE.start_l3_insert_~list#1.offset|) (let ((.cse0 (not (= 0 |c_ULTIMATE.start_l3_insert_~item~1#1.base|))) (.cse1 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse2 (= |c_ULTIMATE.start_l2_insert_~item~2#1.base| |c_ULTIMATE.start_l3_insert_#in~list#1.base|)) (.cse3 (= |c_ULTIMATE.start_l2_insert_~list#1.base| |c_ULTIMATE.start_l2_insert_#in~list#1.base|)) (.cse4 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse5 (= |c_ULTIMATE.start_l1_insert_~list#1.base| |c_ULTIMATE.start_l1_insert_#in~list#1.base|)) (.cse6 (not (= |c_ULTIMATE.start_l0_insert_~item~4#1.base| 0))) (.cse7 (not (= |c_ULTIMATE.start_l1_insert_~item~3#1.base| 0))) (.cse8 (= |c_ULTIMATE.start_l3_insert_#in~list#1.base| |c_ULTIMATE.start_l3_insert_~list#1.base|)) (.cse9 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse10 (not (= |c_ULTIMATE.start_l2_insert_~item~2#1.base| 0))) (.cse11 (= |c_ULTIMATE.start_l1_insert_#in~list#1.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|)) (.cse13 (= (select |c_ULTIMATE.start_main_old_#valid#1| 3) 1)) (.cse14 (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_152| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_152| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| 4294967296)) (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| 0))))) (.cse15 (= |c_ULTIMATE.start_l2_insert_#in~list#1.base| |c_ULTIMATE.start_l1_insert_~item~3#1.base|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_182| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_182| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_182| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_182| 3) 0) 0)) .cse7 .cse8 .cse9 .cse10 .cse11 (exists ((|v_old(#memory_int)_AFTER_CALL_125| (Array Int (Array Int Int)))) (let ((.cse12 (select |v_old(#memory_int)_AFTER_CALL_125| 1))) (and (= (select .cse12 0) 48) (= (select .cse12 1) 0)))) .cse13 (exists ((|v_#length_BEFORE_CALL_188| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_188| 1) 2) (= 14 (select |v_#length_BEFORE_CALL_188| 2)) (= (select |v_#length_BEFORE_CALL_188| 3) 4))) .cse14 .cse15) (and (exists ((|v_#length_BEFORE_CALL_190| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_190| 1)) (= (select |v_#length_BEFORE_CALL_190| 2) 14) (= 4 (select |v_#length_BEFORE_CALL_190| 3)))) .cse0 .cse1 (exists ((|v_old(#memory_int)_AFTER_CALL_126| (Array Int (Array Int Int)))) (let ((.cse16 (select |v_old(#memory_int)_AFTER_CALL_126| 1))) (and (= (select .cse16 1) 0) (= (select .cse16 0) 48)))) .cse2 .cse3 .cse4 .cse5 .cse6 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_184| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_184| 3) 0) 0)) .cse7 .cse8 .cse9 .cse10 .cse11 (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_184| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_184| 3) 0) 0)) .cse13 .cse14 .cse15)))) is different from true [2023-12-02 15:38:27,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8579#(and (<= (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|) 3) (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= 3 |~#list~0.base|) (exists ((|v_#memory_int_389| (Array Int (Array Int Int)))) (= (store |v_#memory_int_389| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_int_389| |ULTIMATE.start_l4_insert_~item~0#1.base|) 4 (select (select |#memory_int| |ULTIMATE.start_l4_insert_~item~0#1.base|) 4))) |#memory_int|)) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 8 (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_431| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_431| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_$Pointer$.base_431| |ULTIMATE.start_l4_insert_~item~0#1.base|) 4 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) 4))))) (exists ((|v_#memory_$Pointer$.offset_431| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_431| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_$Pointer$.offset_431| |ULTIMATE.start_l4_insert_~item~0#1.base|) 4 0)))) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (or (and (exists ((|v_#length_BEFORE_CALL_190| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_190| 1)) (= (select |v_#length_BEFORE_CALL_190| 2) 14) (= 4 (select |v_#length_BEFORE_CALL_190| 3)))) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (exists ((|v_old(#memory_int)_AFTER_CALL_126| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_AFTER_CALL_126| 1) 1) 0) (= (select (select |v_old(#memory_int)_AFTER_CALL_126| 1) 0) 48))) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_184| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_184| 3) 0) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_184| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_184| 3) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) 4) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_152| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_152| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| 4294967296)) (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| 0)))) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|)) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_182| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_182| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_182| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_182| 3) 0) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_old(#memory_int)_AFTER_CALL_125| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_AFTER_CALL_125| 1) 0) 48) (= (select (select |v_old(#memory_int)_AFTER_CALL_125| 1) 1) 0))) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) 4) 0)) (exists ((|v_#length_BEFORE_CALL_188| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_188| 1) 2) (= 14 (select |v_#length_BEFORE_CALL_188| 2)) (= (select |v_#length_BEFORE_CALL_188| 3) 4))) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_152| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_152| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| 4294967296)) (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_406| 0)))) (= |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))' at error location [2023-12-02 15:38:27,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:38:27,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:38:27,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-02 15:38:27,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080954271] [2023-12-02 15:38:27,302 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:38:27,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 15:38:27,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:38:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 15:38:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1987, Unknown=9, NotChecked=372, Total=2550 [2023-12-02 15:38:27,305 INFO L87 Difference]: Start difference. First operand 219 states and 249 transitions. Second operand has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 24 states have internal predecessors, (45), 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) [2023-12-02 15:38:29,337 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] [2023-12-02 15:38:31,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:33,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:35,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:38,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:40,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:42,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:38:50,387 INFO L93 Difference]: Finished difference Result 309 states and 359 transitions. [2023-12-02 15:38:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 15:38:50,388 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 24 states have internal predecessors, (45), 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 99 [2023-12-02 15:38:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:38:50,389 INFO L225 Difference]: With dead ends: 309 [2023-12-02 15:38:50,389 INFO L226 Difference]: Without dead ends: 309 [2023-12-02 15:38:50,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=272, Invalid=3156, Unknown=10, NotChecked=468, Total=3906 [2023-12-02 15:38:50,391 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 144 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 17 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 663 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:38:50,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 914 Invalid, 3828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3141 Invalid, 7 Unknown, 663 Unchecked, 17.6s Time] [2023-12-02 15:38:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-12-02 15:38:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 217. [2023-12-02 15:38:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 126 states have (on average 1.7698412698412698) internal successors, (223), 201 states have internal predecessors, (223), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:38:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 247 transitions. [2023-12-02 15:38:50,399 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 247 transitions. Word has length 99 [2023-12-02 15:38:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:38:50,400 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 247 transitions. [2023-12-02 15:38:50,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 24 states have internal predecessors, (45), 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) [2023-12-02 15:38:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 247 transitions. [2023-12-02 15:38:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 15:38:50,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:38:50,401 INFO L195 NwaCegarLoop]: trace histogram [50, 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] [2023-12-02 15:38:50,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 15:38:50,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:38:50,602 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:38:50,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:38:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash 579091201, now seen corresponding path program 1 times [2023-12-02 15:38:50,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:38:50,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709292588] [2023-12-02 15:38:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:38:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:38:50,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:38:50,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663131244] [2023-12-02 15:38:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:38:50,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:38:50,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:38:50,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:38:50,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:38:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:38:51,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 15:38:51,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:38:51,140 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:38:51,181 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:38:51,182 INFO L378 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 [2023-12-02 15:38:51,224 WARN L876 $PredicateComparison]: unable to prove that (exists ((|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| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:38:51,288 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-12-02 15:38:51,288 INFO L378 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 24 treesize of output 28 [2023-12-02 15:38:51,335 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-12-02 15:38:51,377 INFO L349 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2023-12-02 15:38:51,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2023-12-02 15:38:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 717 proven. 3 refuted. 0 times theorem prover too weak. 325 trivial. 555 not checked. [2023-12-02 15:38:51,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:38:51,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:38:51,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709292588] [2023-12-02 15:38:51,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:38:51,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663131244] [2023-12-02 15:38:51,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663131244] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:38:51,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542077036] [2023-12-02 15:38:51,649 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:38:51,649 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:38:51,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:38:51,649 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:38:51,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:38:52,357 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-12-02 15:38:52,523 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:38:57,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9548#(and (exists ((|v_#memory_int_434| (Array Int (Array Int Int))) (|v_#memory_int_433| (Array Int (Array Int Int))) (|v_ULTIMATE.start_l4_insert_~list#1.base_18| Int) (|v_#memory_int_432| (Array Int (Array Int Int))) (|v_ULTIMATE.start_l4_insert_~list#1.offset_16| Int) (|v_#memory_$Pointer$.base_475| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_474| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_474| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_475| (Array Int (Array Int Int)))) (and (<= (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) 8) (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|))) (= |v_#memory_int_434| (store |v_#memory_int_433| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (store (select |v_#memory_int_433| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (select (select |v_#memory_int_434| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|))))) (= |v_#memory_$Pointer$.offset_475| (store |v_#memory_$Pointer$.offset_474| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (store (select |v_#memory_$Pointer$.offset_474| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) 4) (select (select |v_#memory_$Pointer$.offset_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) 4))))) (= (store |v_#memory_int_432| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (store (select |v_#memory_int_432| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) 4) (select (select |v_#memory_int_433| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) 4)))) |v_#memory_int_433|) (= (select |#valid| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) 1) (<= (+ 4 |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (select |#length| |v_ULTIMATE.start_l4_insert_~list#1.base_18|)) (= |#memory_int| (store |v_#memory_int_434| |v_ULTIMATE.start_l4_insert_~list#1.base_18| (store (select |v_#memory_int_434| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16| (select (select |#memory_int| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)))) (<= 0 |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (= (store (store |v_#memory_$Pointer$.base_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (store (select |v_#memory_$Pointer$.base_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (select (select |v_#memory_$Pointer$.base_475| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|))) |v_ULTIMATE.start_l4_insert_~list#1.base_18| (store (select (store |v_#memory_$Pointer$.base_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (store (select |v_#memory_$Pointer$.base_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (select (select |v_#memory_$Pointer$.base_475| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|))) |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|))) |#memory_$Pointer$.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) 1) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (store (select |v_#memory_$Pointer$.offset_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (select (select |v_#memory_$Pointer$.offset_475| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|))) |v_ULTIMATE.start_l4_insert_~list#1.base_18| (store (select (store |v_#memory_$Pointer$.offset_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (store (select |v_#memory_$Pointer$.offset_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (select (select |v_#memory_$Pointer$.offset_475| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|))) |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)))) (= (store |v_#memory_$Pointer$.base_474| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) (store (select |v_#memory_$Pointer$.base_474| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) 4) (select (select |v_#memory_$Pointer$.base_475| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l4_insert_~list#1.base_18|) |v_ULTIMATE.start_l4_insert_~list#1.offset_16|) 4)))) |v_#memory_$Pointer$.base_475|))) (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1)) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0))' at error location [2023-12-02 15:38:57,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:38:57,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:38:57,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-02 15:38:57,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823554089] [2023-12-02 15:38:57,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:38:57,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 15:38:57,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:38:57,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 15:38:57,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=902, Unknown=4, NotChecked=186, Total=1190 [2023-12-02 15:38:57,953 INFO L87 Difference]: Start difference. First operand 217 states and 247 transitions. Second operand has 15 states, 12 states have (on average 3.5) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 15:38:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:38:58,498 INFO L93 Difference]: Finished difference Result 306 states and 356 transitions. [2023-12-02 15:38:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:38:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.5) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 103 [2023-12-02 15:38:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:38:58,501 INFO L225 Difference]: With dead ends: 306 [2023-12-02 15:38:58,501 INFO L226 Difference]: Without dead ends: 306 [2023-12-02 15:38:58,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 186 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=123, Invalid=1144, Unknown=5, NotChecked=210, Total=1482 [2023-12-02 15:38:58,502 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 245 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 986 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:38:58,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1147 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 769 Invalid, 0 Unknown, 986 Unchecked, 0.4s Time] [2023-12-02 15:38:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-12-02 15:38:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 214. [2023-12-02 15:38:58,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.746031746031746) internal successors, (220), 198 states have internal predecessors, (220), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:38:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2023-12-02 15:38:58,510 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 103 [2023-12-02 15:38:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:38:58,510 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2023-12-02 15:38:58,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.5) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 15:38:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2023-12-02 15:38:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 15:38:58,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:38:58,511 INFO L195 NwaCegarLoop]: trace histogram [50, 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] [2023-12-02 15:38:58,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 15:38:58,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:38:58,712 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:38:58,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:38:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash 579091202, now seen corresponding path program 1 times [2023-12-02 15:38:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:38:58,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889230575] [2023-12-02 15:38:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:38:58,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:38:58,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:38:58,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62642625] [2023-12-02 15:38:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:38:58,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:38:58,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:38:58,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:38:58,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:39:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:39:04,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 130 conjunts are in the unsatisfiable core [2023-12-02 15:39:04,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:39:04,598 INFO L378 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 1 [2023-12-02 15:39:12,040 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:39:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:39:12,192 INFO L378 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 18 treesize of output 13 [2023-12-02 15:39:12,206 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:39:12,206 INFO L378 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 [2023-12-02 15:39:13,362 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:39:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:39:13,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 15:39:13,536 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 15:39:13,537 INFO L378 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 [2023-12-02 15:39:14,395 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse1 (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (<= (mod .cse0 4294967296) .cse1) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| .cse1) |c_#length|) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0)))) is different from true [2023-12-02 15:39:57,196 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:39:57,197 INFO L378 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 18 treesize of output 17 [2023-12-02 15:40:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 389 proven. 476 refuted. 0 times theorem prover too weak. 116 trivial. 619 not checked. [2023-12-02 15:40:04,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:10,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889230575] [2023-12-02 15:40:10,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:40:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62642625] [2023-12-02 15:40:10,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62642625] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156349999] [2023-12-02 15:40:10,140 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 15:40:10,140 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:10,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:10,141 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:10,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:12,846 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-12-02 15:40:13,050 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:41:21,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10468#(and (<= (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|) 7) (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (exists ((|v_#memory_int_459| (Array Int (Array Int Int))) (|v_ULTIMATE.start_l4_insert_~list#1.base_19| Int) (|v_#memory_int_458| (Array Int (Array Int Int))) (|v_#memory_int_457| (Array Int (Array Int Int))) (|v_ULTIMATE.start_l4_insert_#in~list#1.base_11| Int) (|v_#memory_$Pointer$.base_500| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_499| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_499| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_458| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (select |v_#memory_int_458| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 0 (select (select |v_#memory_int_459| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 0))) |v_#memory_int_459|) (or (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_244| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_244| 3) 0) 0)) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (not (= 0 (select (select |v_#memory_$Pointer$.base_500| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4))) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_old(#memory_int)_AFTER_CALL_162| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_AFTER_CALL_162| 1) 1) 0) (= (select (select |v_old(#memory_int)_AFTER_CALL_162| 1) 0) 48))) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_11| |ULTIMATE.start_l3_insert_~item~1#1.base|) (exists ((|v_#length_BEFORE_CALL_256| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_256| 2) 14) (= (select |v_#length_BEFORE_CALL_256| 1) 2) (= 4 (select |v_#length_BEFORE_CALL_256| 3)))) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_11| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_167| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_494| Int)) (and (or (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_494| 0) (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_494|)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_167| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_494| 4294967296)))) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_244| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_244| 3) 0) 0))) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_242| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_242| 3) 0) 0)) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (not (= 0 (select (select |v_#memory_$Pointer$.base_500| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4))) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (exists ((|v_old(#memory_int)_AFTER_CALL_161| (Array Int (Array Int Int)))) (and (= 48 (select (select |v_old(#memory_int)_AFTER_CALL_161| 1) 0)) (= (select (select |v_old(#memory_int)_AFTER_CALL_161| 1) 1) 0))) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_242| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_242| 3) 0) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_11| |ULTIMATE.start_l3_insert_~item~1#1.base|) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_11| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) 0)) (exists ((|v_#length_BEFORE_CALL_254| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_254| 1)) (= 14 (select |v_#length_BEFORE_CALL_254| 2)) (= (select |v_#length_BEFORE_CALL_254| 3) 4))) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_167| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_494| Int)) (and (or (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_494| 0) (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_494|)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_167| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_494| 4294967296)))))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 1) (<= 8 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0))) (= (store |v_#memory_int_457| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (select |v_#memory_int_457| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4 (select (select |v_#memory_int_458| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4))) |v_#memory_int_458|) (<= 4 (select |#length| |v_ULTIMATE.start_l4_insert_~list#1.base_19|)) (= (store |v_#memory_$Pointer$.base_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (select |v_#memory_$Pointer$.base_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4 (select (select |v_#memory_$Pointer$.base_500| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4))) |v_#memory_$Pointer$.base_500|) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_500| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (select |v_#memory_$Pointer$.base_500| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 0 (select (select |v_#memory_$Pointer$.base_500| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_19| (store (select (store |v_#memory_$Pointer$.base_500| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (select |v_#memory_$Pointer$.base_500| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 0 (select (select |v_#memory_$Pointer$.base_500| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)))) (= |#memory_int| (store |v_#memory_int_459| |v_ULTIMATE.start_l4_insert_~list#1.base_19| (store (select |v_#memory_int_459| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0 (select (select |#memory_int| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)))) (= (select |#valid| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 1) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (store (select |v_#memory_$Pointer$.offset_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (select |v_#memory_$Pointer$.offset_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_19| (store (select (store |v_#memory_$Pointer$.offset_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (store (select |v_#memory_$Pointer$.offset_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0) (store (select |v_#memory_$Pointer$.offset_499| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_19|) 0 0))))) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0))' at error location [2023-12-02 15:41:21,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:41:21,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:41:21,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2023-12-02 15:41:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096490975] [2023-12-02 15:41:21,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:41:21,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-02 15:41:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:41:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-02 15:41:21,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=4609, Unknown=72, NotChecked=420, Total=5402 [2023-12-02 15:41:21,960 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand has 45 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 15:41:24,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:26,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:28,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:32,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:34,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:41,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:43,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:49,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:51,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:58,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:00,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:06,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:08,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:15,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:17,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:23,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:25,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:31,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:34,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:40,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:42,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:50,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:17,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:25,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:28,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:37,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:39,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:41,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:47,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:49,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:52,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:43:59,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:01,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:03,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:06,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:08,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:10,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:12,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:14,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:16,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:18,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:20,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:22,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:24,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:27,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:30,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:32,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:34,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:37,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:39,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:42,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:44,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:47,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:50,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:52,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:54,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:57,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:44:59,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:01,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:04,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:06,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:08,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:11,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:13,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:16,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:18,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:21,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:23,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:25,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:28,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:30,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:32,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:34,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:36,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:38,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:41,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:43,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:45,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:48,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:50,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:53,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:55,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:57,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:45:59,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:01,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:03,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:06,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:08,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:10,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:12,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:14,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:16,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:18,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:20,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:22,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:24,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:27,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:29,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:31,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:46:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:46:32,265 INFO L93 Difference]: Finished difference Result 312 states and 370 transitions. [2023-12-02 15:46:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 15:46:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 103 [2023-12-02 15:46:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:46:32,268 INFO L225 Difference]: With dead ends: 312 [2023-12-02 15:46:32,268 INFO L226 Difference]: Without dead ends: 312 [2023-12-02 15:46:32,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 134 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2056 ImplicationChecksByTransitivity, 217.5s TimeCoverageRelationStatistics Valid=450, Invalid=7287, Unknown=107, NotChecked=528, Total=8372 [2023-12-02 15:46:32,271 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 386 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 4416 mSolverCounterSat, 35 mSolverCounterUnsat, 100 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 5580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4416 IncrementalHoareTripleChecker+Invalid, 100 IncrementalHoareTripleChecker+Unknown, 1029 IncrementalHoareTripleChecker+Unchecked, 221.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:46:32,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1385 Invalid, 5580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4416 Invalid, 100 Unknown, 1029 Unchecked, 221.6s Time] [2023-12-02 15:46:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-12-02 15:46:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 211. [2023-12-02 15:46:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 126 states have (on average 1.7222222222222223) internal successors, (217), 195 states have internal predecessors, (217), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:46:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 241 transitions. [2023-12-02 15:46:32,280 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 241 transitions. Word has length 103 [2023-12-02 15:46:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:46:32,281 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 241 transitions. [2023-12-02 15:46:32,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 15:46:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 241 transitions. [2023-12-02 15:46:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-02 15:46:32,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:46:32,282 INFO L195 NwaCegarLoop]: trace histogram [50, 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] [2023-12-02 15:46:32,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:46:32,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 15:46:32,483 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:46:32,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:46:32,483 INFO L85 PathProgramCache]: Analyzing trace with hash 771958081, now seen corresponding path program 1 times [2023-12-02 15:46:32,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:46:32,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945582134] [2023-12-02 15:46:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:46:32,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:46:32,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:46:32,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494219979] [2023-12-02 15:46:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:46:32,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:46:32,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:46:32,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:46:32,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 15:46:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:46:40,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-02 15:46:40,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:46:40,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2023-12-02 15:46:40,849 INFO L378 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 1 [2023-12-02 15:46:47,713 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:46:47,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:46:47,867 INFO L378 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 18 treesize of output 13 [2023-12-02 15:46:47,886 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 15:46:47,886 INFO L378 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 19 treesize of output 16 [2023-12-02 15:46:48,347 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:46:48,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:46:48,444 INFO L378 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 18 treesize of output 13 [2023-12-02 15:46:48,451 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 15:46:48,451 INFO L378 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 [2023-12-02 15:46:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 596 proven. 278 refuted. 0 times theorem prover too weak. 279 trivial. 447 not checked. [2023-12-02 15:46:49,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:46:50,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:46:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945582134] [2023-12-02 15:46:50,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:46:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494219979] [2023-12-02 15:46:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494219979] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:46:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475682658] [2023-12-02 15:46:50,085 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 15:46:50,085 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:46:50,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:46:50,086 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:46:50,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:46:52,928 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-12-02 15:46:53,100 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:47:04,597 WARN L876 $PredicateComparison]: unable to prove that (and (= 3 |c_ULTIMATE.start_l0_insert_~list#1.base|) (<= 1 |c_#StackHeapBarrier|) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_l0_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.base| 3) (let ((.cse1 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse2 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse3 (not (= |c_ULTIMATE.start_l0_insert_~item~4#1.base| 0))) (.cse4 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse5 (= (select |c_ULTIMATE.start_main_old_#valid#1| 3) 1)) (.cse6 (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_172| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_172| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| 4294967296)))))) (or (and (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_272| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_272| 3) 0) 0)) (exists ((|v_old(#memory_int)_AFTER_CALL_179| (Array Int (Array Int Int)))) (let ((.cse0 (select |v_old(#memory_int)_AFTER_CALL_179| 1))) (and (= (select .cse0 1) 0) (= 48 (select .cse0 0))))) .cse1 .cse2 (exists ((|v_#length_BEFORE_CALL_288| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_288| 3) 4) (= 2 (select |v_#length_BEFORE_CALL_288| 1)) (= 14 (select |v_#length_BEFORE_CALL_288| 2)))) .cse3 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_272| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_272| 3) 0) 0)) .cse4 .cse5 .cse6) (and (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_274| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_274| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_274| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_274| 3) 0) 0)) (exists ((|v_#length_BEFORE_CALL_290| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_290| 2) 14) (= 2 (select |v_#length_BEFORE_CALL_290| 1)) (= (select |v_#length_BEFORE_CALL_290| 3) 4))) .cse1 .cse2 .cse3 .cse4 .cse5 (exists ((|v_old(#memory_int)_AFTER_CALL_180| (Array Int (Array Int Int)))) (let ((.cse7 (select |v_old(#memory_int)_AFTER_CALL_180| 1))) (and (= 0 (select .cse7 1)) (= 48 (select .cse7 0))))) .cse6))) (= 3 |c_~#list~0.base|) (= |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.offset| 0)) is different from true [2023-12-02 15:47:50,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11417#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (= 3 |~#list~0.base|) (<= 8 (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|) 7) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l3_insert_#t~mem11#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) 4)) (exists ((|v_ULTIMATE.start_l4_insert_#in~list#1.base_13| Int) (|v_#memory_$Pointer$.offset_524| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_525| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_524| (Array Int (Array Int Int))) (|v_#memory_int_484| (Array Int (Array Int Int))) (|v_ULTIMATE.start_l4_insert_~list#1.base_20| Int) (|v_#memory_int_483| (Array Int (Array Int Int))) (|v_#memory_int_482| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 1) (= (store |v_#memory_$Pointer$.base_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (select |v_#memory_$Pointer$.base_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4 (select (select |v_#memory_$Pointer$.base_525| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4))) |v_#memory_$Pointer$.base_525|) (= (store |v_#memory_int_482| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (select |v_#memory_int_482| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4 (select (select |v_#memory_int_483| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4))) |v_#memory_int_483|) (= (store |v_#memory_int_483| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (select |v_#memory_int_483| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 0 (select (select |v_#memory_int_484| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 0))) |v_#memory_int_484|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 1) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (store (select |v_#memory_$Pointer$.offset_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (select |v_#memory_$Pointer$.offset_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_20| (store (select (store |v_#memory_$Pointer$.offset_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (store (select |v_#memory_$Pointer$.offset_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (select |v_#memory_$Pointer$.offset_524| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0 0))) (<= 8 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0))) (<= 4 (select |#length| |v_ULTIMATE.start_l4_insert_~list#1.base_20|)) (or (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_274| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_274| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_274| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_274| 3) 0) 0)) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) 0)) (exists ((|v_#length_BEFORE_CALL_290| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_290| 2) 14) (= 2 (select |v_#length_BEFORE_CALL_290| 1)) (= (select |v_#length_BEFORE_CALL_290| 3) 4))) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (not (= (select (select |v_#memory_$Pointer$.base_525| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_13| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_13| |ULTIMATE.start_l3_insert_~item~1#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (exists ((|v_old(#memory_int)_AFTER_CALL_180| (Array Int (Array Int Int)))) (and (= 0 (select (select |v_old(#memory_int)_AFTER_CALL_180| 1) 1)) (= 48 (select (select |v_old(#memory_int)_AFTER_CALL_180| 1) 0)))) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_172| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_172| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| 4294967296))))) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_272| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_272| 3) 0) 0)) (exists ((|v_old(#memory_int)_AFTER_CALL_179| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_AFTER_CALL_179| 1) 1) 0) (= 48 (select (select |v_old(#memory_int)_AFTER_CALL_179| 1) 0)))) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (not (= (select (select |v_#memory_$Pointer$.base_525| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 4) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_13| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (exists ((|v_#length_BEFORE_CALL_288| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_288| 3) 4) (= 2 (select |v_#length_BEFORE_CALL_288| 1)) (= 14 (select |v_#length_BEFORE_CALL_288| 2)))) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_13| |ULTIMATE.start_l3_insert_~item~1#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_272| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_272| 3) 0) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_172| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_172| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_531| 4294967296)))))) (= (store (store |v_#memory_$Pointer$.base_525| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (select |v_#memory_$Pointer$.base_525| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 0 (select (select |v_#memory_$Pointer$.base_525| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_20| (store (select (store |v_#memory_$Pointer$.base_525| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0) (store (select |v_#memory_$Pointer$.base_525| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)) 0 (select (select |v_#memory_$Pointer$.base_525| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0))) |#memory_$Pointer$.base|) (= |#memory_int| (store |v_#memory_int_484| |v_ULTIMATE.start_l4_insert_~list#1.base_20| (store (select |v_#memory_int_484| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0 (select (select |#memory_int| |v_ULTIMATE.start_l4_insert_~list#1.base_20|) 0)))))) (= |ULTIMATE.start_l3_insert_#t~mem11#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) 4)) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0))' at error location [2023-12-02 15:47:50,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:47:50,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:47:50,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-02 15:47:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62237525] [2023-12-02 15:47:50,833 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:47:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 15:47:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:47:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 15:47:50,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2723, Unknown=20, NotChecked=324, Total=3306 [2023-12-02 15:47:50,836 INFO L87 Difference]: Start difference. First operand 211 states and 241 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:47:52,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:47:54,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:47:59,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:48:01,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:48:03,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:48:05,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:48:08,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:48:10,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:48:12,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:48:14,697 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] [2023-12-02 15:48:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:48:20,793 INFO L93 Difference]: Finished difference Result 302 states and 352 transitions. [2023-12-02 15:48:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 15:48:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 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) Word has length 104 [2023-12-02 15:48:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:48:20,795 INFO L225 Difference]: With dead ends: 302 [2023-12-02 15:48:20,795 INFO L226 Difference]: Without dead ends: 302 [2023-12-02 15:48:20,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 153 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 70.6s TimeCoverageRelationStatistics Valid=331, Invalid=4082, Unknown=21, NotChecked=396, Total=4830 [2023-12-02 15:48:20,797 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 136 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 2816 mSolverCounterSat, 12 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 3487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2816 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 649 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:48:20,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 959 Invalid, 3487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2816 Invalid, 10 Unknown, 649 Unchecked, 24.7s Time] [2023-12-02 15:48:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-12-02 15:48:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 210. [2023-12-02 15:48:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 126 states have (on average 1.7142857142857142) internal successors, (216), 194 states have internal predecessors, (216), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:48:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2023-12-02 15:48:20,807 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 104 [2023-12-02 15:48:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:48:20,807 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2023-12-02 15:48:20,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 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) [2023-12-02 15:48:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2023-12-02 15:48:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 15:48:20,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:48:20,809 INFO L195 NwaCegarLoop]: trace histogram [50, 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, 1] [2023-12-02 15:48:20,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 15:48:21,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 15:48:21,010 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-12-02 15:48:21,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:48:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2134863958, now seen corresponding path program 1 times [2023-12-02 15:48:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:48:21,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243924465] [2023-12-02 15:48:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:48:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:48:21,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:48:21,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928369755] [2023-12-02 15:48:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:48:21,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:48:21,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:48:21,072 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:48:21,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 15:48:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:48:21,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-02 15:48:21,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:48:21,806 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:48:21,874 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:48:21,875 INFO L378 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 [2023-12-02 15:48:22,093 INFO L349 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-12-02 15:48:22,094 INFO L378 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 [2023-12-02 15:48:22,420 INFO L349 Elim1Store]: treesize reduction 60, result has 31.8 percent of original size [2023-12-02 15:48:22,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 40 [2023-12-02 15:48:22,553 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-12-02 15:48:22,618 INFO L349 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2023-12-02 15:48:22,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2023-12-02 15:48:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 531 proven. 174 refuted. 0 times theorem prover too weak. 242 trivial. 653 not checked. [2023-12-02 15:48:22,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:48:23,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:48:23,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243924465] [2023-12-02 15:48:23,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:48:23,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928369755] [2023-12-02 15:48:23,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928369755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:48:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80183945] [2023-12-02 15:48:23,188 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 15:48:23,188 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:48:23,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:48:23,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:48:23,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:48:26,402 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-12-02 15:48:26,577 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:48:35,541 WARN L876 $PredicateComparison]: unable to prove that (and (= 3 |c_ULTIMATE.start_l0_insert_~list#1.base|) (= |c_ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l4_insert_#t~ret6#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_l3_insert_#in~list#1.offset| 4) (= |c_ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (= |c_ULTIMATE.start_l0_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.base| 3) (= 3 |c_~#list~0.base|) (= |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= 4 |c_ULTIMATE.start_l3_insert_~list#1.offset|) (let ((.cse0 (= |c_ULTIMATE.start_l4_insert_#in~list#1.base| |c_ULTIMATE.start_l3_insert_~item~1#1.base|)) (.cse1 (not (= 0 |c_ULTIMATE.start_l3_insert_~item~1#1.base|))) (.cse2 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse3 (= |c_ULTIMATE.start_l2_insert_~item~2#1.base| |c_ULTIMATE.start_l3_insert_#in~list#1.base|)) (.cse4 (= |c_ULTIMATE.start_l2_insert_~list#1.base| |c_ULTIMATE.start_l2_insert_#in~list#1.base|)) (.cse5 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse6 (= |c_ULTIMATE.start_l1_insert_~list#1.base| |c_ULTIMATE.start_l1_insert_#in~list#1.base|)) (.cse7 (not (= |c_ULTIMATE.start_l0_insert_~item~4#1.base| 0))) (.cse8 (not (= |c_ULTIMATE.start_l4_insert_#t~ret6#1.base| 0))) (.cse9 (not (= |c_ULTIMATE.start_l1_insert_~item~3#1.base| 0))) (.cse10 (= |c_ULTIMATE.start_l3_insert_#in~list#1.base| |c_ULTIMATE.start_l3_insert_~list#1.base|)) (.cse11 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse12 (not (= |c_ULTIMATE.start_l2_insert_~item~2#1.base| 0))) (.cse13 (= |c_ULTIMATE.start_l1_insert_#in~list#1.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|)) (.cse15 (= (select |c_ULTIMATE.start_main_old_#valid#1| 3) 1)) (.cse16 (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_181| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_181| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| 4294967296))))) (.cse17 (= |c_ULTIMATE.start_l2_insert_#in~list#1.base| |c_ULTIMATE.start_l1_insert_~item~3#1.base|)) (.cse18 (= |c_ULTIMATE.start_l4_insert_#in~list#1.base| |c_ULTIMATE.start_l4_insert_~list#1.base|))) (or (and (exists ((|v_#length_BEFORE_CALL_318| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_318| 1)) (= 14 (select |v_#length_BEFORE_CALL_318| 2)) (= (select |v_#length_BEFORE_CALL_318| 3) 4))) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_302| (Array Int (Array Int Int)))) (= 0 (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_302| 3) 0))) .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 (exists ((|v_old(#memory_int)_AFTER_CALL_197| (Array Int (Array Int Int)))) (let ((.cse14 (select |v_old(#memory_int)_AFTER_CALL_197| 1))) (and (= (select .cse14 0) 48) (= (select .cse14 1) 0)))) .cse15 .cse16 .cse17 (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_302| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_302| 3) 0) 0)) .cse18) (and (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_304| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_304| 3) 0) 0)) .cse0 .cse1 .cse2 .cse3 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_304| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_304| 3) 0) 0)) .cse4 .cse5 .cse6 (exists ((|v_#length_BEFORE_CALL_320| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_320| 3) 4) (= 2 (select |v_#length_BEFORE_CALL_320| 1)) (= (select |v_#length_BEFORE_CALL_320| 2) 14))) .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse15 (exists ((|v_old(#memory_int)_AFTER_CALL_198| (Array Int (Array Int Int)))) (let ((.cse19 (select |v_old(#memory_int)_AFTER_CALL_198| 1))) (and (= (select .cse19 1) 0) (= (select .cse19 0) 48)))) .cse16 .cse17 .cse18)))) is different from true [2023-12-02 15:48:54,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12408#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (exists ((|v_ULTIMATE.start_l4_insert_#in~list#1.base_15| Int) (|v_#memory_int_533| (Array Int (Array Int Int))) (|v_#memory_int_532| (Array Int (Array Int Int))) (|v_#memory_int_529| (Array Int (Array Int Int))) (|v_ULTIMATE.start_l4_insert_~list#1.base_21| Int) (|v_ULTIMATE.start_l3_insert_#in~list#1.base_8| Int) (|v_ULTIMATE.start_l3_insert_~list#1.base_16| Int) (|v_#memory_int_531| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_571| (Array Int (Array Int Int))) (|v_#memory_int_530| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_574| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_572| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_571| (Array Int (Array Int Int)))) (and (<= 8 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4))) (= |#memory_int| (store |v_#memory_int_533| |v_ULTIMATE.start_l3_insert_~list#1.base_16| (store (select |v_#memory_int_533| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4 (select (select |#memory_int| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)))) (= (store |v_#memory_int_532| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4) (store (select |v_#memory_int_532| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)) 4 (select (select |v_#memory_int_533| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)) 4))) |v_#memory_int_533|) (<= 8 (select |#length| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) (= (store (store |v_#memory_$Pointer$.base_572| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.base_572| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 0 (select (select |v_#memory_$Pointer$.base_572| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21| (store (select (store |v_#memory_$Pointer$.base_572| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.base_572| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 0 (select (select |v_#memory_$Pointer$.base_572| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0 (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_#memory_$Pointer$.base_574|) (= (store |v_#memory_$Pointer$.base_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.base_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 (select (select |v_#memory_$Pointer$.base_572| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4))) |v_#memory_$Pointer$.base_572|) (= (store |v_#memory_int_531| |v_ULTIMATE.start_l4_insert_~list#1.base_21| (store (select |v_#memory_int_531| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0 (select (select |v_#memory_int_532| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_#memory_int_532|) (= (select |#valid| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 1) (= (store |v_#memory_int_529| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_int_529| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 (select (select |v_#memory_int_530| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4))) |v_#memory_int_530|) (= |#memory_$Pointer$.offset| (store (store (store (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21| (store (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0 0)) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4) (store (select (store (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21| (store (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0 0)) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)) 4 (select (select (store (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21| (store (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0 0)) |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4))) |v_ULTIMATE.start_l3_insert_~list#1.base_16| (store (select (store (store (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21| (store (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0 0)) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4) (store (select (store (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21| (store (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0 0)) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)) 4 (select (select (store (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21| (store (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0) 0 (select (select (store |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_$Pointer$.offset_571| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4 0)) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0))) |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0 0)) |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4))) |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4 0))) (<= 8 (select |#length| |v_ULTIMATE.start_l3_insert_~list#1.base_16|)) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_574| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4) (store (select |v_#memory_$Pointer$.base_574| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)) 4 (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4))) |v_ULTIMATE.start_l3_insert_~list#1.base_16| (store (select (store |v_#memory_$Pointer$.base_574| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4) (store (select |v_#memory_$Pointer$.base_574| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)) 4 (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4))) |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)))) (= (select |#valid| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 1) (= (store |v_#memory_int_530| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) (store (select |v_#memory_int_530| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 0 (select (select |v_#memory_int_531| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 0))) |v_#memory_int_531|) (or (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (= |v_ULTIMATE.start_l3_insert_~list#1.base_16| |v_ULTIMATE.start_l3_insert_#in~list#1.base_8|) (exists ((|v_#length_BEFORE_CALL_318| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_318| 1)) (= 14 (select |v_#length_BEFORE_CALL_318| 2)) (= (select |v_#length_BEFORE_CALL_318| 3) 4))) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_302| (Array Int (Array Int Int)))) (= 0 (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_302| 3) 0))) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_15| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |v_ULTIMATE.start_l3_insert_#in~list#1.base_8|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_15| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4) 0)) (not (= 0 (select (select |v_#memory_$Pointer$.base_572| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4))) (exists ((|v_old(#memory_int)_AFTER_CALL_197| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_AFTER_CALL_197| 1) 0) 48) (= (select (select |v_old(#memory_int)_AFTER_CALL_197| 1) 1) 0))) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_181| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_181| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| 4294967296)))) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_302| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_302| 3) 0) 0))) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (= |v_ULTIMATE.start_l3_insert_~list#1.base_16| |v_ULTIMATE.start_l3_insert_#in~list#1.base_8|) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_304| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_304| 3) 0) 0)) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_304| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_304| 3) 0) 0)) (not (= (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0) 0)) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_15| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |v_ULTIMATE.start_l3_insert_#in~list#1.base_8|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= |v_ULTIMATE.start_l4_insert_#in~list#1.base_15| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4)) (exists ((|v_#length_BEFORE_CALL_320| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_320| 3) 4) (= 2 (select |v_#length_BEFORE_CALL_320| 1)) (= (select |v_#length_BEFORE_CALL_320| 2) 14))) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_16|) 4) 0)) (not (= 0 (select (select |v_#memory_$Pointer$.base_572| (select (select |v_#memory_$Pointer$.base_574| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 0)) 4))) (exists ((|v_old(#memory_int)_AFTER_CALL_198| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_AFTER_CALL_198| 1) 1) 0) (= (select (select |v_old(#memory_int)_AFTER_CALL_198| 1) 0) 48))) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_181| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_181| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_573| 4294967296)))) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|))) (= (select |#valid| |v_ULTIMATE.start_l4_insert_~list#1.base_21|) 1))) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1)) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|))' at error location [2023-12-02 15:48:54,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:48:54,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:48:54,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-02 15:48:54,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427957438] [2023-12-02 15:48:54,289 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:48:54,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 15:48:54,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:48:54,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 15:48:54,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2468, Unknown=16, NotChecked=312, Total=3080 [2023-12-02 15:48:54,291 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 15:48:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:48:55,398 INFO L93 Difference]: Finished difference Result 301 states and 352 transitions. [2023-12-02 15:48:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:48:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 107 [2023-12-02 15:48:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:48:55,401 INFO L225 Difference]: With dead ends: 301 [2023-12-02 15:48:55,401 INFO L226 Difference]: Without dead ends: 301 [2023-12-02 15:48:55,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 178 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=338, Invalid=3079, Unknown=17, NotChecked=348, Total=3782 [2023-12-02 15:48:55,403 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 261 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:48:55,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1285 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 959 Invalid, 0 Unknown, 650 Unchecked, 0.8s Time] [2023-12-02 15:48:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-12-02 15:48:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 207. [2023-12-02 15:48:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 126 states have (on average 1.6904761904761905) internal successors, (213), 191 states have internal predecessors, (213), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:48:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 237 transitions. [2023-12-02 15:48:55,418 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 237 transitions. Word has length 107 [2023-12-02 15:48:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:48:55,418 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 237 transitions. [2023-12-02 15:48:55,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 15:48:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 237 transitions. [2023-12-02 15:48:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 15:48:55,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:48:55,419 INFO L195 NwaCegarLoop]: trace histogram [50, 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, 1] [2023-12-02 15:48:55,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 15:48:55,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 15:48:55,620 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)] === [2023-12-02 15:48:55,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:48:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2134863957, now seen corresponding path program 1 times [2023-12-02 15:48:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:48:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065546032] [2023-12-02 15:48:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:48:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:48:55,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:48:55,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580715237] [2023-12-02 15:48:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:48:55,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:48:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:48:55,681 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:48:55,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45e91e80-01c1-4847-8791-8e35de87b486/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 15:49:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:00,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 157 conjunts are in the unsatisfiable core [2023-12-02 15:49:00,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:00,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2023-12-02 15:49:00,809 INFO L378 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 1 [2023-12-02 15:49:08,213 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:49:08,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:08,347 INFO L378 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 18 treesize of output 13 [2023-12-02 15:49:08,452 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 15:49:08,452 INFO L378 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 19 treesize of output 16 [2023-12-02 15:49:09,940 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:49:09,940 INFO L378 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 18 treesize of output 17 [2023-12-02 15:49:10,029 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:49:10,029 INFO L378 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 [2023-12-02 15:49:14,685 INFO L349 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-12-02 15:49:14,685 INFO L378 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 [2023-12-02 15:49:14,825 INFO L378 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 18 treesize of output 13 [2023-12-02 15:49:17,957 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-12-02 15:49:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:18,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 15:49:18,159 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-12-02 15:49:18,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-12-02 15:49:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 217 proven. 452 refuted. 0 times theorem prover too weak. 171 trivial. 760 not checked. [2023-12-02 15:49:19,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:49:20,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:49:20,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065546032] [2023-12-02 15:49:20,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:49:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580715237] [2023-12-02 15:49:20,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580715237] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:49:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1388612452] [2023-12-02 15:49:20,201 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 15:49:20,201 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:49:20,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:49:20,202 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:49:20,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:49:21,220 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-12-02 15:49:21,427 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:50:38,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13351#(and (or (< (select |#length| |ULTIMATE.start_l2_insert_~list#1.base|) (+ |ULTIMATE.start_l2_insert_~list#1.offset| 4)) (< |ULTIMATE.start_l2_insert_~list#1.offset| 0)) (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_599| (Array Int (Array Int Int))) (|v_#memory_int_559| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_600| (Array Int (Array Int Int))) (|v_#memory_int_558| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_602| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_602| (Array Int (Array Int Int))) (|v_#memory_int_557| (Array Int (Array Int Int))) (|v_ULTIMATE.start_l4_insert_~list#1.offset_20| Int) (|v_ULTIMATE.start_l4_insert_~list#1.base_22| Int) (|v_ULTIMATE.start_l3_insert_~list#1.offset_15| Int) (|v_#memory_$Pointer$.base_600| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_599| (Array Int (Array Int Int))) (|v_ULTIMATE.start_l3_insert_~list#1.base_17| Int) (|v_#memory_int_561| (Array Int (Array Int Int))) (|v_#memory_int_560| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_561| |v_ULTIMATE.start_l3_insert_~list#1.base_17| (store (select |v_#memory_int_561| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15| (select (select |#memory_int| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)))) (<= 0 (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) 4)) (<= 0 (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (= |v_#memory_int_559| (store |v_#memory_int_558| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (store (select |v_#memory_int_558| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (select (select |v_#memory_int_559| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))))) (= (store |v_#memory_int_560| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) (store (select |v_#memory_int_560| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) 4) (select (select |v_#memory_int_561| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) 4)))) |v_#memory_int_561|) (= (store |v_#memory_int_557| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (store (select |v_#memory_int_557| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (+ (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) 4) (select (select |v_#memory_int_558| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (+ (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) 4)))) |v_#memory_int_558|) (= (store |v_#memory_$Pointer$.base_599| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (store (select |v_#memory_$Pointer$.base_599| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (+ (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) 4) (select (select |v_#memory_$Pointer$.base_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (+ (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) 4)))) |v_#memory_$Pointer$.base_600|) (<= (+ 4 |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) (select |#length| |v_ULTIMATE.start_l3_insert_~list#1.base_17|)) (<= (+ (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) 8) (select |#length| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))) (<= (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) 8) (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_602| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) (store (select |v_#memory_$Pointer$.base_602| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) 4) (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|))) |v_ULTIMATE.start_l3_insert_~list#1.base_17| (store (select (store |v_#memory_$Pointer$.base_602| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) (store (select |v_#memory_$Pointer$.base_602| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) 4) (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|))) |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)))) (= (select |#valid| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) 1) (<= (+ 4 |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (select |#length| |v_ULTIMATE.start_l4_insert_~list#1.base_22|)) (= (select |#valid| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) 1) (= (store |v_#memory_int_559| |v_ULTIMATE.start_l4_insert_~list#1.base_22| (store (select |v_#memory_int_559| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20| (select (select |v_#memory_int_560| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))) |v_#memory_int_560|) (= (select |#valid| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) 1) (= (store |v_#memory_$Pointer$.offset_599| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (store (select |v_#memory_$Pointer$.offset_599| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (+ (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) 4) (select (select |v_#memory_$Pointer$.offset_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (+ (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) 4)))) |v_#memory_$Pointer$.offset_600|) (<= 0 |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_602| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) (store (select |v_#memory_$Pointer$.offset_602| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) 4) (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|))) |v_ULTIMATE.start_l3_insert_~list#1.base_17| (store (select (store |v_#memory_$Pointer$.offset_602| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) (store (select |v_#memory_$Pointer$.offset_602| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) 4) (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|))) |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)))) (<= 0 |v_ULTIMATE.start_l3_insert_~list#1.offset_15|) (= (store (store |v_#memory_$Pointer$.base_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (store (select |v_#memory_$Pointer$.base_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (select (select |v_#memory_$Pointer$.base_600| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))) |v_ULTIMATE.start_l4_insert_~list#1.base_22| (store (select (store |v_#memory_$Pointer$.base_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (store (select |v_#memory_$Pointer$.base_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (select (select |v_#memory_$Pointer$.base_600| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))) |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))) |v_#memory_$Pointer$.base_602|) (= (store (store |v_#memory_$Pointer$.offset_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (store (select |v_#memory_$Pointer$.offset_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (select (select |v_#memory_$Pointer$.offset_600| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))) |v_ULTIMATE.start_l4_insert_~list#1.base_22| (store (select (store |v_#memory_$Pointer$.offset_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (store (select |v_#memory_$Pointer$.offset_600| (select (select |v_#memory_$Pointer$.base_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|)) (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|) (select (select |v_#memory_$Pointer$.offset_600| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))) |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20| (select (select |v_#memory_$Pointer$.offset_602| |v_ULTIMATE.start_l4_insert_~list#1.base_22|) |v_ULTIMATE.start_l4_insert_~list#1.offset_20|))) |v_#memory_$Pointer$.offset_602|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_l3_insert_~list#1.base_17|) |v_ULTIMATE.start_l3_insert_~list#1.offset_15|)) 1))))' at error location [2023-12-02 15:50:38,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:50:38,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:50:38,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2023-12-02 15:50:38,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817350556] [2023-12-02 15:50:38,348 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:50:38,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 15:50:38,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:50:38,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 15:50:38,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3105, Unknown=18, NotChecked=226, Total=3540 [2023-12-02 15:50:38,352 INFO L87 Difference]: Start difference. First operand 207 states and 237 transitions. Second operand has 37 states, 31 states have (on average 2.032258064516129) internal successors, (63), 33 states have internal predecessors, (63), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 15:50:40,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:50:42,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:50:46,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:50:49,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:50:53,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:50:57,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:50:59,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:51:02,132 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]