./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 cf1a7837 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_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX --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 0.2.3-dev-cf1a783 [2023-11-12 00:12:45,052 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:12:45,133 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:12:45,138 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:12:45,138 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:12:45,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:12:45,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:12:45,169 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:12:45,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:12:45,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:12:45,172 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:12:45,172 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:12:45,173 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:12:45,174 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:12:45,174 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:12:45,175 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:12:45,176 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:12:45,176 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:12:45,177 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:12:45,178 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:12:45,178 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:12:45,179 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:12:45,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:12:45,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:12:45,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:12:45,182 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:12:45,183 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:12:45,183 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:12:45,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:12:45,184 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:12:45,185 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:12:45,185 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:12:45,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:12:45,186 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:12:45,187 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:12:45,187 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:12:45,188 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:12:45,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:12:45,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:12:45,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:45,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:12:45,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:12:45,191 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:12:45,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:12:45,192 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:12:45,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:12:45,192 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_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2023-11-12 00:12:45,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:12:45,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:12:45,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:12:45,487 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:12:45,489 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:12:45,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-12 00:12:48,673 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:12:48,965 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:12:48,966 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-12 00:12:48,989 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/data/950b6f881/e15d8f3ad3ab4fd6ae7102686770c839/FLAG5ab85d4c4 [2023-11-12 00:12:49,018 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/data/950b6f881/e15d8f3ad3ab4fd6ae7102686770c839 [2023-11-12 00:12:49,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:12:49,036 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:12:49,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:49,038 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:12:49,049 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:12:49,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,052 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ff3f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49, skipping insertion in model container [2023-11-12 00:12:49,052 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,130 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:12:49,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:49,687 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:12:49,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:49,843 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:12:49,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49 WrapperNode [2023-11-12 00:12:49,843 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:49,845 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:49,845 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:12:49,845 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:12:49,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,888 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,932 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 246 [2023-11-12 00:12:49,932 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:49,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:12:49,933 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:12:49,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:12:49,952 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,959 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,959 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,985 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,995 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:49,997 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:50,000 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:50,010 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:12:50,011 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:12:50,011 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:12:50,011 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:12:50,012 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (1/1) ... [2023-11-12 00:12:50,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:50,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:50,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:12:50,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:12:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:12:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:12:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:12:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:12:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-12 00:12:50,096 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-12 00:12:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:12:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:12:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-11-12 00:12:50,099 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-11-12 00:12:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:12:50,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:12:50,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:12:50,297 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:12:50,299 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:12:50,956 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:12:51,089 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:12:51,090 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-12 00:12:51,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:51 BoogieIcfgContainer [2023-11-12 00:12:51,099 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:12:51,101 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:12:51,101 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:12:51,105 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:12:51,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:12:49" (1/3) ... [2023-11-12 00:12:51,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e8f9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:51, skipping insertion in model container [2023-11-12 00:12:51,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:49" (2/3) ... [2023-11-12 00:12:51,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e8f9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:51, skipping insertion in model container [2023-11-12 00:12:51,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:51" (3/3) ... [2023-11-12 00:12:51,110 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2023-11-12 00:12:51,131 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:12:51,131 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-11-12 00:12:51,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:12:51,206 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;@2d3b5895, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:12:51,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-11-12 00:12:51,211 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) [2023-11-12 00:12:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:12:51,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:51,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:12:51,219 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)] === [2023-11-12 00:12:51,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:51,224 INFO L85 PathProgramCache]: Analyzing trace with hash 457306, now seen corresponding path program 1 times [2023-11-12 00:12:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:51,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115206711] [2023-11-12 00:12:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:51,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:51,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115206711] [2023-11-12 00:12:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115206711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:51,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:51,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:12:51,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925017610] [2023-11-12 00:12:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:51,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:12:51,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:12:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:12:51,462 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) [2023-11-12 00:12:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:51,584 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2023-11-12 00:12:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:12:51,586 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 [2023-11-12 00:12:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:51,596 INFO L225 Difference]: With dead ends: 206 [2023-11-12 00:12:51,596 INFO L226 Difference]: Without dead ends: 205 [2023-11-12 00:12:51,598 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 [2023-11-12 00:12:51,602 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:51,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-12 00:12:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-11-12 00:12:51,655 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) [2023-11-12 00:12:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 235 transitions. [2023-11-12 00:12:51,661 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 235 transitions. Word has length 3 [2023-11-12 00:12:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:51,662 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 235 transitions. [2023-11-12 00:12:51,662 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) [2023-11-12 00:12:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 235 transitions. [2023-11-12 00:12:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:12:51,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:51,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:12:51,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:12:51,664 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)] === [2023-11-12 00:12:51,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash 435565614, now seen corresponding path program 1 times [2023-11-12 00:12:51,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:51,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659520337] [2023-11-12 00:12:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:51,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:51,684 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:51,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470444929] [2023-11-12 00:12:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:51,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:51,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:51,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:51,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:12:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:51,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:12:51,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:51,903 INFO L351 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 [2023-11-12 00:12:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:51,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:12:51,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:51,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659520337] [2023-11-12 00:12:51,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:51,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470444929] [2023-11-12 00:12:51,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470444929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:51,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:51,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:12:51,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187801376] [2023-11-12 00:12:51,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:51,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:12:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:12:51,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:51,924 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) [2023-11-12 00:12:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:52,113 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2023-11-12 00:12:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:12:52,113 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 [2023-11-12 00:12:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:52,115 INFO L225 Difference]: With dead ends: 204 [2023-11-12 00:12:52,115 INFO L226 Difference]: Without dead ends: 204 [2023-11-12 00:12:52,116 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 [2023-11-12 00:12:52,117 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:52,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 355 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:12:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-12 00:12:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-12 00:12:52,141 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) [2023-11-12 00:12:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 234 transitions. [2023-11-12 00:12:52,145 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 234 transitions. Word has length 5 [2023-11-12 00:12:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:52,145 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 234 transitions. [2023-11-12 00:12:52,146 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) [2023-11-12 00:12:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 234 transitions. [2023-11-12 00:12:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:12:52,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:52,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:12:52,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:52,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:52,348 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)] === [2023-11-12 00:12:52,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:52,348 INFO L85 PathProgramCache]: Analyzing trace with hash 617632572, now seen corresponding path program 1 times [2023-11-12 00:12:52,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:52,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019767318] [2023-11-12 00:12:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:52,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:52,363 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:52,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557296682] [2023-11-12 00:12:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:52,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:52,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:52,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:52,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:12:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:52,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 00:12:52,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:52,570 INFO L351 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 [2023-11-12 00:12:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:52,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:12:52,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:52,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019767318] [2023-11-12 00:12:52,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:52,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557296682] [2023-11-12 00:12:52,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557296682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:52,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:52,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:12:52,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990439538] [2023-11-12 00:12:52,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:52,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:12:52,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:12:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:12:52,630 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) [2023-11-12 00:12:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:52,876 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2023-11-12 00:12:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:12:52,877 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 [2023-11-12 00:12:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:52,879 INFO L225 Difference]: With dead ends: 209 [2023-11-12 00:12:52,879 INFO L226 Difference]: Without dead ends: 209 [2023-11-12 00:12:52,880 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 [2023-11-12 00:12:52,881 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 [2023-11-12 00:12:52,882 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] [2023-11-12 00:12:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-12 00:12:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-11-12 00:12:52,896 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) [2023-11-12 00:12:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2023-11-12 00:12:52,899 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 6 [2023-11-12 00:12:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:52,900 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2023-11-12 00:12:52,900 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) [2023-11-12 00:12:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2023-11-12 00:12:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:12:52,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:52,902 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] [2023-11-12 00:12:52,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:53,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:53,113 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)] === [2023-11-12 00:12:53,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:53,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1056375185, now seen corresponding path program 1 times [2023-11-12 00:12:53,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:53,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856004143] [2023-11-12 00:12:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:53,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:53,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:53,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958767772] [2023-11-12 00:12:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:53,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:53,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:53,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:53,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:12:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:53,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:12:53,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:53,485 INFO L351 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 [2023-11-12 00:12:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-12 00:12:53,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:12:53,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856004143] [2023-11-12 00:12:53,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958767772] [2023-11-12 00:12:53,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958767772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:53,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:53,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:12:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233843285] [2023-11-12 00:12:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:12:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:12:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:12:53,549 INFO L87 Difference]: Start difference. First operand 209 states and 239 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-11-12 00:12:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:53,752 INFO L93 Difference]: Finished difference Result 208 states and 238 transitions. [2023-11-12 00:12:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:12:53,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 45 [2023-11-12 00:12:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:53,754 INFO L225 Difference]: With dead ends: 208 [2023-11-12 00:12:53,755 INFO L226 Difference]: Without dead ends: 208 [2023-11-12 00:12:53,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:12:53,756 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:53,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 571 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:12:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-12 00:12:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-11-12 00:12:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 108 states have (on average 1.9814814814814814) 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) [2023-11-12 00:12:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 238 transitions. [2023-11-12 00:12:53,777 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 238 transitions. Word has length 45 [2023-11-12 00:12:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:53,777 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 238 transitions. [2023-11-12 00:12:53,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-11-12 00:12:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 238 transitions. [2023-11-12 00:12:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 00:12:53,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:53,779 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:12:53,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:53,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:53,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-12 00:12:53,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:53,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1248251230, now seen corresponding path program 1 times [2023-11-12 00:12:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:53,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533068276] [2023-11-12 00:12:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:53,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:54,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:54,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612356768] [2023-11-12 00:12:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:54,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:54,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:54,033 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:54,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:12:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:54,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:12:54,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:54,353 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 [2023-11-12 00:12:54,382 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 00:12:54,382 INFO L351 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 [2023-11-12 00:12:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 3 not checked. [2023-11-12 00:12:54,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:54,657 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 00:12:54,658 INFO L351 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 [2023-11-12 00:12:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 00:12:54,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:54,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533068276] [2023-11-12 00:12:54,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:54,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612356768] [2023-11-12 00:12:54,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612356768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:54,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253696100] [2023-11-12 00:12:54,709 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:12:54,709 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:54,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:54,721 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:54,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:55,034 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 57 for LOIs [2023-11-12 00:12:55,218 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:56,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [253696100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:56,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:12:56,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2023-11-12 00:12:56,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731921016] [2023-11-12 00:12:56,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:56,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:12:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:56,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:12:56,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-11-12 00:12:56,315 INFO L87 Difference]: Start difference. First operand 208 states and 238 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:12:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:57,354 INFO L93 Difference]: Finished difference Result 214 states and 245 transitions. [2023-11-12 00:12:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:12:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2023-11-12 00:12:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:57,358 INFO L225 Difference]: With dead ends: 214 [2023-11-12 00:12:57,358 INFO L226 Difference]: Without dead ends: 214 [2023-11-12 00:12:57,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-11-12 00:12:57,361 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 0 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:57,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 377 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:12:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-12 00:12:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-12 00:12:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 113 states have (on average 1.9380530973451326) internal successors, (219), 197 states have internal predecessors, (219), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:12:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 245 transitions. [2023-11-12 00:12:57,388 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 245 transitions. Word has length 48 [2023-11-12 00:12:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:57,389 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 245 transitions. [2023-11-12 00:12:57,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:12:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 245 transitions. [2023-11-12 00:12:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 00:12:57,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:57,393 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:12:57,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:57,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:57,606 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)] === [2023-11-12 00:12:57,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:57,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1711092588, now seen corresponding path program 1 times [2023-11-12 00:12:57,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:57,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855337170] [2023-11-12 00:12:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:57,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:57,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:57,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113027288] [2023-11-12 00:12:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:57,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:57,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:57,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:57,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:12:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:57,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:12:57,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:57,950 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 [2023-11-12 00:12:57,973 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 00:12:57,973 INFO L351 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 [2023-11-12 00:12:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 3 not checked. [2023-11-12 00:12:57,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:58,222 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 00:12:58,223 INFO L351 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 [2023-11-12 00:12:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-12 00:12:58,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:58,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855337170] [2023-11-12 00:12:58,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:58,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113027288] [2023-11-12 00:12:58,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113027288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:58,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160344250] [2023-11-12 00:12:58,251 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:12:58,251 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:58,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:58,252 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:58,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:59,901 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-12 00:13:00,189 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:01,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3066#(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) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)))' at error location [2023-11-12 00:13:01,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:01,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:01,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2023-11-12 00:13:01,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605961754] [2023-11-12 00:13:01,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:13:01,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:13:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=447, Unknown=1, NotChecked=42, Total=552 [2023-11-12 00:13:01,252 INFO L87 Difference]: Start difference. First operand 214 states and 245 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2023-11-12 00:13:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:01,914 INFO L93 Difference]: Finished difference Result 304 states and 355 transitions. [2023-11-12 00:13:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:13:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 49 [2023-11-12 00:13:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:01,918 INFO L225 Difference]: With dead ends: 304 [2023-11-12 00:13:01,918 INFO L226 Difference]: Without dead ends: 304 [2023-11-12 00:13:01,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=74, Invalid=529, Unknown=1, NotChecked=46, Total=650 [2023-11-12 00:13:01,919 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 119 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:01,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 1112 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 685 Invalid, 0 Unknown, 340 Unchecked, 0.5s Time] [2023-11-12 00:13:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-12 00:13:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 212. [2023-11-12 00:13:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 113 states have (on average 1.920353982300885) internal successors, (217), 195 states have internal predecessors, (217), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:13:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 243 transitions. [2023-11-12 00:13:01,937 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 243 transitions. Word has length 49 [2023-11-12 00:13:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:01,939 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 243 transitions. [2023-11-12 00:13:01,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2023-11-12 00:13:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 243 transitions. [2023-11-12 00:13:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 00:13:01,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:01,942 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:13:01,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:02,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:02,149 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)] === [2023-11-12 00:13:02,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:02,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1711092587, now seen corresponding path program 1 times [2023-11-12 00:13:02,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:02,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137910074] [2023-11-12 00:13:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:02,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:02,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:02,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029936041] [2023-11-12 00:13:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:02,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:02,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:02,195 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:02,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:13:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:02,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:13:02,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:02,474 INFO L351 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 [2023-11-12 00:13:02,550 INFO L351 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 [2023-11-12 00:13:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 00:13:05,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 00:13:05,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:05,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137910074] [2023-11-12 00:13:05,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:05,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029936041] [2023-11-12 00:13:05,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029936041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:05,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247710371] [2023-11-12 00:13:05,780 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:13:05,780 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:05,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:05,781 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:05,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:07,013 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-12 00:13:07,335 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:08,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3896#(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 [2023-11-12 00:13:08,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:08,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:08,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2023-11-12 00:13:08,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953852875] [2023-11-12 00:13:08,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:08,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:13:08,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:13:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=357, Unknown=1, NotChecked=0, Total=420 [2023-11-12 00:13:08,934 INFO L87 Difference]: Start difference. First operand 212 states and 243 transitions. Second operand has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-12 00:13:12,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:13:14,100 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] [2023-11-12 00:13:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:15,136 INFO L93 Difference]: Finished difference Result 220 states and 251 transitions. [2023-11-12 00:13:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:13:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 49 [2023-11-12 00:13:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:15,139 INFO L225 Difference]: With dead ends: 220 [2023-11-12 00:13:15,139 INFO L226 Difference]: Without dead ends: 216 [2023-11-12 00:13:15,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=75, Invalid=430, Unknown=1, NotChecked=0, Total=506 [2023-11-12 00:13:15,140 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:15,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 914 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2023-11-12 00:13:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-12 00:13:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 210. [2023-11-12 00:13:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 112 states have (on average 1.9285714285714286) 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) [2023-11-12 00:13:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2023-11-12 00:13:15,150 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 49 [2023-11-12 00:13:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:15,150 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2023-11-12 00:13:15,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-12 00:13:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2023-11-12 00:13:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 00:13:15,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:15,152 INFO L195 NwaCegarLoop]: trace histogram [12, 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] [2023-11-12 00:13:15,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:15,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:15,363 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)] === [2023-11-12 00:13:15,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash -593964257, now seen corresponding path program 2 times [2023-11-12 00:13:15,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:15,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264257952] [2023-11-12 00:13:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:15,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:15,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413724245] [2023-11-12 00:13:15,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:13:15,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:15,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:15,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:15,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:13:15,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:13:15,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:15,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 00:13:15,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:15,807 INFO L351 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 [2023-11-12 00:13:15,826 INFO L351 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 [2023-11-12 00:13:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 60 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-12 00:13:15,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 60 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-12 00:13:16,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264257952] [2023-11-12 00:13:16,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413724245] [2023-11-12 00:13:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413724245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653647080] [2023-11-12 00:13:16,237 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:13:16,237 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:16,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:16,239 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:16,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:17,807 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-12 00:13:18,048 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:19,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4708#(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 [2023-11-12 00:13:19,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:19,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:19,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-12 00:13:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923330379] [2023-11-12 00:13:19,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:19,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:13:19,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:19,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:13:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:13:19,267 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 12 states have internal predecessors, (29), 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) [2023-11-12 00:13:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:20,026 INFO L93 Difference]: Finished difference Result 218 states and 250 transitions. [2023-11-12 00:13:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:13:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 12 states have internal predecessors, (29), 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 60 [2023-11-12 00:13:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:20,029 INFO L225 Difference]: With dead ends: 218 [2023-11-12 00:13:20,029 INFO L226 Difference]: Without dead ends: 215 [2023-11-12 00:13:20,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:13:20,031 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 20 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:20,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1653 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:13:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-12 00:13:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2023-11-12 00:13:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 117 states have (on average 1.8888888888888888) internal successors, (221), 199 states have internal predecessors, (221), 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) [2023-11-12 00:13:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 245 transitions. [2023-11-12 00:13:20,040 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 245 transitions. Word has length 60 [2023-11-12 00:13:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:20,040 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 245 transitions. [2023-11-12 00:13:20,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 12 states have internal predecessors, (29), 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) [2023-11-12 00:13:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 245 transitions. [2023-11-12 00:13:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:13:20,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:20,042 INFO L195 NwaCegarLoop]: trace histogram [21, 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] [2023-11-12 00:13:20,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-12 00:13:20,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:20,248 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)] === [2023-11-12 00:13:20,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:20,249 INFO L85 PathProgramCache]: Analyzing trace with hash 343165361, now seen corresponding path program 3 times [2023-11-12 00:13:20,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:20,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684184250] [2023-11-12 00:13:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:20,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:20,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:20,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756377782] [2023-11-12 00:13:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:13:20,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:20,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:20,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:20,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:13:21,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:13:21,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:21,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-12 00:13:21,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:21,291 INFO L351 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 [2023-11-12 00:13:21,297 INFO L351 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 [2023-11-12 00:13:21,426 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| (select |c_#length| |zalloc_or_die_calloc_model_~ptr~0#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) 0))) is different from true [2023-11-12 00:13:21,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:13:21,496 INFO L351 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 14 treesize of output 9 [2023-11-12 00:13:21,516 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:13:21,516 INFO L351 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 [2023-11-12 00:13:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 31 not checked. [2023-11-12 00:13:21,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:21,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:21,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684184250] [2023-11-12 00:13:21,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:21,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756377782] [2023-11-12 00:13:21,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756377782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:21,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69399818] [2023-11-12 00:13:21,633 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:13:21,633 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:21,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:21,634 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:21,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:22,618 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-12 00:13:22,887 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:24,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5395#(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 [2023-11-12 00:13:24,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:24,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:13:24,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-12 00:13:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482716248] [2023-11-12 00:13:24,056 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:24,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 00:13:24,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 00:13:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=448, Unknown=1, NotChecked=42, Total=552 [2023-11-12 00:13:24,058 INFO L87 Difference]: Start difference. First operand 215 states and 245 transitions. Second operand has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:13:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:25,180 INFO L93 Difference]: Finished difference Result 305 states and 355 transitions. [2023-11-12 00:13:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:13:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2023-11-12 00:13:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:25,183 INFO L225 Difference]: With dead ends: 305 [2023-11-12 00:13:25,183 INFO L226 Difference]: Without dead ends: 305 [2023-11-12 00:13:25,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=581, Unknown=1, NotChecked=48, Total=702 [2023-11-12 00:13:25,184 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 116 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:25,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 319 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1255 Invalid, 0 Unknown, 336 Unchecked, 1.0s Time] [2023-11-12 00:13:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-12 00:13:25,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 213. [2023-11-12 00:13:25,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 117 states have (on average 1.8717948717948718) internal successors, (219), 197 states have internal predecessors, (219), 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) [2023-11-12 00:13:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 243 transitions. [2023-11-12 00:13:25,198 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 243 transitions. Word has length 69 [2023-11-12 00:13:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:25,201 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 243 transitions. [2023-11-12 00:13:25,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:13:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 243 transitions. [2023-11-12 00:13:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:13:25,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:25,209 INFO L195 NwaCegarLoop]: trace histogram [21, 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] [2023-11-12 00:13:25,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:25,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:25,422 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-12 00:13:25,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2048204503, now seen corresponding path program 1 times [2023-11-12 00:13:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:25,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670883355] [2023-11-12 00:13:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:25,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:25,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:25,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432663826] [2023-11-12 00:13:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:25,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:25,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:25,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:25,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:13:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:25,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 00:13:25,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:25,856 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 [2023-11-12 00:13:25,874 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 00:13:25,875 INFO L351 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 [2023-11-12 00:13:25,928 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 00:13:25,928 INFO L351 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 [2023-11-12 00:13:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 48 not checked. [2023-11-12 00:13:25,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:26,289 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 00:13:26,289 INFO L351 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 [2023-11-12 00:13:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 215 proven. 50 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-11-12 00:13:26,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:26,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670883355] [2023-11-12 00:13:26,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:26,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432663826] [2023-11-12 00:13:26,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432663826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:26,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279409458] [2023-11-12 00:13:26,306 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:13:26,306 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:26,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:26,307 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:26,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:27,228 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-12 00:13:27,444 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:28,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6358#(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|) (exists ((|v_#memory_$Pointer$.base_281| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_281| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))))) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= 0 (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (exists ((|v_#memory_$Pointer$.offset_281| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_281| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_$Pointer$.offset_281| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))))) (exists ((|v_#memory_int_239| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_239| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_int_239| |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|)))))))' at error location [2023-11-12 00:13:28,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:28,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:28,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-11-12 00:13:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535010106] [2023-11-12 00:13:28,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:13:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:13:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=535, Unknown=1, NotChecked=46, Total=650 [2023-11-12 00:13:28,612 INFO L87 Difference]: Start difference. First operand 213 states and 243 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) [2023-11-12 00:13:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:29,293 INFO L93 Difference]: Finished difference Result 302 states and 352 transitions. [2023-11-12 00:13:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:13:29,294 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 70 [2023-11-12 00:13:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:29,296 INFO L225 Difference]: With dead ends: 302 [2023-11-12 00:13:29,296 INFO L226 Difference]: Without dead ends: 302 [2023-11-12 00:13:29,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 171 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=84, Invalid=675, Unknown=1, NotChecked=52, Total=812 [2023-11-12 00:13:29,298 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 229 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:29,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1189 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 775 Invalid, 0 Unknown, 334 Unchecked, 0.6s Time] [2023-11-12 00:13:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-12 00:13:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 210. [2023-11-12 00:13:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 117 states have (on average 1.8461538461538463) 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) [2023-11-12 00:13:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2023-11-12 00:13:29,315 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 70 [2023-11-12 00:13:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:29,315 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2023-11-12 00:13:29,316 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) [2023-11-12 00:13:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2023-11-12 00:13:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:13:29,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:29,318 INFO L195 NwaCegarLoop]: trace histogram [21, 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] [2023-11-12 00:13:29,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:29,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:29,534 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-12 00:13:29,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:29,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2048204504, now seen corresponding path program 1 times [2023-11-12 00:13:29,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:29,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348894595] [2023-11-12 00:13:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:29,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:29,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:29,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329948427] [2023-11-12 00:13:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:29,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:29,591 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:29,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e504915a-6688-42b0-8500-39486873a86c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:13:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:30,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-12 00:13:30,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:30,240 INFO L351 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 [2023-11-12 00:13:30,970 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 [2023-11-12 00:13:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:13:31,045 INFO L351 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 [2023-11-12 00:13:31,052 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:13:31,052 INFO L351 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 [2023-11-12 00:13:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 175 proven. 57 refuted. 0 times theorem prover too weak. 127 trivial. 52 not checked. [2023-11-12 00:13:31,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:31,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:31,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348894595] [2023-11-12 00:13:31,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:31,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329948427] [2023-11-12 00:13:31,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329948427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:31,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671218218] [2023-11-12 00:13:31,231 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:13:31,231 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:31,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:31,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:31,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:32,225 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-12 00:13:32,476 INFO L180 IcfgInterpreter]: Interpretation finished