./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ --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-9bd2c7f [2023-11-19 04:48:12,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:48:12,628 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 04:48:12,636 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:48:12,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:48:12,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:48:12,680 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:48:12,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:48:12,682 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:48:12,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:48:12,688 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:48:12,689 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:48:12,690 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:48:12,692 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:48:12,693 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:48:12,693 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:48:12,693 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:48:12,694 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:48:12,694 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:48:12,695 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:48:12,695 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:48:12,696 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:48:12,697 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:48:12,697 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:48:12,698 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:48:12,699 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:48:12,699 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:48:12,700 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:48:12,700 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:48:12,701 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 04:48:12,702 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 04:48:12,702 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 04:48:12,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:48:12,703 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:48:12,703 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:48:12,704 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:48:12,704 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:48:12,704 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:48:12,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:48:12,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:12,705 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:48:12,706 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:48:12,706 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:48:12,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:48:12,707 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:48:12,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:48:12,707 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_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2023-11-19 04:48:13,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:48:13,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:48:13,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:48:13,140 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:48:13,142 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:48:13,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-19 04:48:16,642 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:48:16,985 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:48:16,985 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/sv-benchmarks/c/memsafety/test-0235-2.i [2023-11-19 04:48:17,015 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/data/7d34d99b4/2de647e4812e405fb3e206facdc37acc/FLAG581ea91fd [2023-11-19 04:48:17,037 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/data/7d34d99b4/2de647e4812e405fb3e206facdc37acc [2023-11-19 04:48:17,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:48:17,047 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:48:17,051 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:17,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:48:17,059 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:48:17,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:17,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d109fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17, skipping insertion in model container [2023-11-19 04:48:17,062 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:17,145 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:48:17,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:17,777 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:48:17,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:17,898 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:48:17,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17 WrapperNode [2023-11-19 04:48:17,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:17,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:17,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:48:17,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:48:17,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:17,929 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:17,969 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 246 [2023-11-19 04:48:17,970 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:17,971 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:48:17,971 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:48:17,971 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:48:17,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:17,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:17,988 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:17,988 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:18,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:18,009 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:18,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:18,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:18,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:48:18,025 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:48:18,026 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:48:18,026 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:48:18,027 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (1/1) ... [2023-11-19 04:48:18,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:18,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:48:18,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:48:18,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:48:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:48:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:48:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:48:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-19 04:48:18,130 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-19 04:48:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:48:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:48:18,132 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-11-19 04:48:18,133 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-11-19 04:48:18,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:48:18,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:48:18,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:48:18,380 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:18,383 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:19,126 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:19,251 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:19,251 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-19 04:48:19,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:19 BoogieIcfgContainer [2023-11-19 04:48:19,267 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:19,272 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:19,272 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:19,276 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:19,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:17" (1/3) ... [2023-11-19 04:48:19,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b852929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:19, skipping insertion in model container [2023-11-19 04:48:19,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:17" (2/3) ... [2023-11-19 04:48:19,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b852929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:19, skipping insertion in model container [2023-11-19 04:48:19,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:19" (3/3) ... [2023-11-19 04:48:19,284 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2023-11-19 04:48:19,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:19,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-11-19 04:48:19,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:19,408 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;@76eda574, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:19,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-11-19 04:48:19,413 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) [2023-11-19 04:48:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:48:19,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:19,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:48:19,427 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)] === [2023-11-19 04:48:19,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash 457306, now seen corresponding path program 1 times [2023-11-19 04:48:19,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:19,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272085356] [2023-11-19 04:48:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:19,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:19,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272085356] [2023-11-19 04:48:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272085356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:19,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:19,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:19,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096413273] [2023-11-19 04:48:19,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:19,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:48:19,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:48:19,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:48:19,715 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) [2023-11-19 04:48:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:19,860 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2023-11-19 04:48:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:48:19,863 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 [2023-11-19 04:48:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:19,882 INFO L225 Difference]: With dead ends: 206 [2023-11-19 04:48:19,882 INFO L226 Difference]: Without dead ends: 205 [2023-11-19 04:48:19,885 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 [2023-11-19 04:48:19,892 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-19 04:48:19,894 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] [2023-11-19 04:48:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-19 04:48:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-11-19 04:48:19,995 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) [2023-11-19 04:48:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 235 transitions. [2023-11-19 04:48:20,014 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 235 transitions. Word has length 3 [2023-11-19 04:48:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:20,015 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 235 transitions. [2023-11-19 04:48:20,015 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) [2023-11-19 04:48:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 235 transitions. [2023-11-19 04:48:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:48:20,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:20,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:48:20,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:20,018 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)] === [2023-11-19 04:48:20,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:20,019 INFO L85 PathProgramCache]: Analyzing trace with hash 435565614, now seen corresponding path program 1 times [2023-11-19 04:48:20,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:20,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528406449] [2023-11-19 04:48:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:20,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:20,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314600606] [2023-11-19 04:48:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:20,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:20,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:20,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:20,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:48:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:20,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:48:20,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:20,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 04:48:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:20,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:20,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:20,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528406449] [2023-11-19 04:48:20,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:20,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314600606] [2023-11-19 04:48:20,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314600606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:20,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:20,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:20,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763189472] [2023-11-19 04:48:20,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:20,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:20,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:20,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:20,335 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) [2023-11-19 04:48:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:20,575 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2023-11-19 04:48:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:20,576 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 [2023-11-19 04:48:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:20,578 INFO L225 Difference]: With dead ends: 204 [2023-11-19 04:48:20,578 INFO L226 Difference]: Without dead ends: 204 [2023-11-19 04:48:20,579 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 [2023-11-19 04:48:20,580 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 [2023-11-19 04:48:20,581 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] [2023-11-19 04:48:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-19 04:48:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-19 04:48:20,597 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) [2023-11-19 04:48:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 234 transitions. [2023-11-19 04:48:20,600 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 234 transitions. Word has length 5 [2023-11-19 04:48:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:20,600 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 234 transitions. [2023-11-19 04:48:20,601 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) [2023-11-19 04:48:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 234 transitions. [2023-11-19 04:48:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:48:20,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:20,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:48:20,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:20,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:20,821 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)] === [2023-11-19 04:48:20,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash 617632572, now seen corresponding path program 1 times [2023-11-19 04:48:20,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:20,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804299894] [2023-11-19 04:48:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:20,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:20,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:20,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742527108] [2023-11-19 04:48:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:20,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:20,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:20,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:20,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:48:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:20,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:48:20,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:21,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 04:48:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:21,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:21,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:21,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804299894] [2023-11-19 04:48:21,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:21,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742527108] [2023-11-19 04:48:21,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742527108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:21,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:21,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:21,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823863189] [2023-11-19 04:48:21,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:21,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:21,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:21,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:21,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:21,067 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) [2023-11-19 04:48:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:21,315 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2023-11-19 04:48:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:21,316 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 [2023-11-19 04:48:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:21,318 INFO L225 Difference]: With dead ends: 209 [2023-11-19 04:48:21,319 INFO L226 Difference]: Without dead ends: 209 [2023-11-19 04:48:21,319 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 [2023-11-19 04:48:21,320 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 [2023-11-19 04:48:21,321 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] [2023-11-19 04:48:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-19 04:48:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-11-19 04:48:21,336 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) [2023-11-19 04:48:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2023-11-19 04:48:21,339 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 6 [2023-11-19 04:48:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:21,340 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2023-11-19 04:48:21,340 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) [2023-11-19 04:48:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2023-11-19 04:48:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 04:48:21,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:21,343 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] [2023-11-19 04:48:21,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:21,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 04:48:21,565 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)] === [2023-11-19 04:48:21,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:21,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1056375185, now seen corresponding path program 1 times [2023-11-19 04:48:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:21,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824063866] [2023-11-19 04:48:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:21,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:21,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389134041] [2023-11-19 04:48:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:21,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:21,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:21,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:21,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:48:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:21,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:48:21,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:21,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 04:48:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 04:48:21,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:21,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:21,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824063866] [2023-11-19 04:48:21,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:21,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389134041] [2023-11-19 04:48:21,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389134041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:21,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:21,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:21,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63568753] [2023-11-19 04:48:21,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:21,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:21,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:21,962 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) [2023-11-19 04:48:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:22,195 INFO L93 Difference]: Finished difference Result 208 states and 238 transitions. [2023-11-19 04:48:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:22,195 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 [2023-11-19 04:48:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:22,198 INFO L225 Difference]: With dead ends: 208 [2023-11-19 04:48:22,198 INFO L226 Difference]: Without dead ends: 208 [2023-11-19 04:48:22,198 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 [2023-11-19 04:48:22,199 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 7 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-11-19 04:48:22,200 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] [2023-11-19 04:48:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-19 04:48:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-11-19 04:48:22,219 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) [2023-11-19 04:48:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 238 transitions. [2023-11-19 04:48:22,223 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 238 transitions. Word has length 45 [2023-11-19 04:48:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:22,224 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 238 transitions. [2023-11-19 04:48:22,225 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) [2023-11-19 04:48:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 238 transitions. [2023-11-19 04:48:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 04:48:22,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:22,230 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] [2023-11-19 04:48:22,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 04:48:22,456 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)] === [2023-11-19 04:48:22,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1248251230, now seen corresponding path program 1 times [2023-11-19 04:48:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:22,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309228818] [2023-11-19 04:48:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:22,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:22,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:22,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638102586] [2023-11-19 04:48:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:22,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:22,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:22,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:22,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:48:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:22,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 04:48:22,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:22,844 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 [2023-11-19 04:48:22,876 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-19 04:48:22,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-19 04:48:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 3 not checked. [2023-11-19 04:48:22,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:23,178 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 04:48:23,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:48:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-19 04:48:23,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:23,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309228818] [2023-11-19 04:48:23,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638102586] [2023-11-19 04:48:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638102586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717336576] [2023-11-19 04:48:23,243 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-19 04:48:23,244 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:23,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:23,256 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:23,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:23,670 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 57 for LOIs [2023-11-19 04:48:23,838 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:24,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [717336576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:24,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:48:24,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 17 [2023-11-19 04:48:24,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240288623] [2023-11-19 04:48:24,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:24,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:48:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:48:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-11-19 04:48:24,995 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) [2023-11-19 04:48:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:25,966 INFO L93 Difference]: Finished difference Result 214 states and 245 transitions. [2023-11-19 04:48:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:48:25,967 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 [2023-11-19 04:48:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:25,969 INFO L225 Difference]: With dead ends: 214 [2023-11-19 04:48:25,969 INFO L226 Difference]: Without dead ends: 214 [2023-11-19 04:48:25,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-11-19 04:48:25,971 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 0 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:25,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 377 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:48:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-19 04:48:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-19 04:48:25,979 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) [2023-11-19 04:48:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 245 transitions. [2023-11-19 04:48:25,982 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 245 transitions. Word has length 48 [2023-11-19 04:48:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:25,982 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 245 transitions. [2023-11-19 04:48:25,983 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) [2023-11-19 04:48:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 245 transitions. [2023-11-19 04:48:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 04:48:25,984 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:25,984 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] [2023-11-19 04:48:26,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:26,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:26,206 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)] === [2023-11-19 04:48:26,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1711092588, now seen corresponding path program 1 times [2023-11-19 04:48:26,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:26,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578781056] [2023-11-19 04:48:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:26,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:26,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:26,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894113160] [2023-11-19 04:48:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:26,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:26,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:26,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:26,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:48:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:26,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 04:48:26,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:26,503 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 [2023-11-19 04:48:26,519 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-19 04:48:26,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-19 04:48:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 3 not checked. [2023-11-19 04:48:26,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:26,742 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 04:48:26,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:48:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 04:48:26,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:26,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578781056] [2023-11-19 04:48:26,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894113160] [2023-11-19 04:48:26,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894113160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964560124] [2023-11-19 04:48:26,764 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-19 04:48:26,764 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:26,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:26,765 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:26,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:28,200 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-19 04:48:28,536 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:29,681 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 [2023-11-19 04:48:29,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:29,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:48:29,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2023-11-19 04:48:29,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679350382] [2023-11-19 04:48:29,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:29,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:48:29,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:48:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=447, Unknown=1, NotChecked=42, Total=552 [2023-11-19 04:48:29,683 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) [2023-11-19 04:48:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:30,318 INFO L93 Difference]: Finished difference Result 304 states and 355 transitions. [2023-11-19 04:48:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:48:30,319 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 [2023-11-19 04:48:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:30,324 INFO L225 Difference]: With dead ends: 304 [2023-11-19 04:48:30,325 INFO L226 Difference]: Without dead ends: 304 [2023-11-19 04:48:30,326 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 [2023-11-19 04:48:30,329 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 119 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2023-11-19 04:48:30,330 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] [2023-11-19 04:48:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-19 04:48:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 212. [2023-11-19 04:48:30,343 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) [2023-11-19 04:48:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 243 transitions. [2023-11-19 04:48:30,346 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 243 transitions. Word has length 49 [2023-11-19 04:48:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:30,349 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 243 transitions. [2023-11-19 04:48:30,349 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) [2023-11-19 04:48:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 243 transitions. [2023-11-19 04:48:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 04:48:30,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:30,351 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] [2023-11-19 04:48:30,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:48:30,565 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)] === [2023-11-19 04:48:30,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1711092587, now seen corresponding path program 1 times [2023-11-19 04:48:30,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:30,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462567640] [2023-11-19 04:48:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:30,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:30,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969903957] [2023-11-19 04:48:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:30,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:30,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:30,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:48:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:30,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-19 04:48:30,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:30,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 04:48:31,001 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 [2023-11-19 04:48:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:48:31,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 04:48:31,045 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 04:48:31,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 04:48:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 4 not checked. [2023-11-19 04:48:31,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:31,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462567640] [2023-11-19 04:48:31,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969903957] [2023-11-19 04:48:31,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969903957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:31,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860331216] [2023-11-19 04:48:31,191 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-19 04:48:31,191 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:31,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:31,192 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:31,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:32,436 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-19 04:48:32,716 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:34,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3762#(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 [2023-11-19 04:48:34,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:34,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:34,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-19 04:48:34,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237126887] [2023-11-19 04:48:34,038 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:34,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 04:48:34,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:34,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 04:48:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=490, Unknown=1, NotChecked=44, Total=600 [2023-11-19 04:48:34,040 INFO L87 Difference]: Start difference. First operand 212 states and 243 transitions. Second operand has 11 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2023-11-19 04:48:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:35,536 INFO L93 Difference]: Finished difference Result 316 states and 373 transitions. [2023-11-19 04:48:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:48:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 49 [2023-11-19 04:48:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:35,544 INFO L225 Difference]: With dead ends: 316 [2023-11-19 04:48:35,544 INFO L226 Difference]: Without dead ends: 316 [2023-11-19 04:48:35,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=674, Unknown=1, NotChecked=52, Total=812 [2023-11-19 04:48:35,545 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 119 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:35,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 355 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1483 Invalid, 0 Unknown, 355 Unchecked, 1.3s Time] [2023-11-19 04:48:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-19 04:48:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 219. [2023-11-19 04:48:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 118 states have (on average 1.9152542372881356) internal successors, (226), 201 states have internal predecessors, (226), 13 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2023-11-19 04:48:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 258 transitions. [2023-11-19 04:48:35,573 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 258 transitions. Word has length 49 [2023-11-19 04:48:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:35,574 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 258 transitions. [2023-11-19 04:48:35,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2023-11-19 04:48:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 258 transitions. [2023-11-19 04:48:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 04:48:35,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:35,584 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:35,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:35,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 04:48:35,797 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)] === [2023-11-19 04:48:35,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1506233155, now seen corresponding path program 2 times [2023-11-19 04:48:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:35,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525904687] [2023-11-19 04:48:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:35,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:35,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:35,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432375021] [2023-11-19 04:48:35,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:48:35,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:35,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:35,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:35,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:48:35,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:48:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:48:35,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 04:48:36,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:36,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:48:36,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-19 04:48:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-19 04:48:36,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-19 04:48:36,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:36,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525904687] [2023-11-19 04:48:36,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432375021] [2023-11-19 04:48:36,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432375021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621177830] [2023-11-19 04:48:36,608 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-19 04:48:36,608 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:36,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:36,609 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:36,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:40,400 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-11-19 04:48:40,660 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:48,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4621#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 4 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) 7) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (or (and (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_69| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_69| 3) 0) 0)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (exists ((|v_#memory_int_BEFORE_CALL_69| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_69| 1) 1) 0) (= (select (select |v_#memory_int_BEFORE_CALL_69| 1) 0) 48))) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_87| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_107| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_107|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_107| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_87| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_107| 4294967296)))) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (exists ((|v_#length_BEFORE_CALL_71| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_71| 3) 4) (= (select |v_#length_BEFORE_CALL_71| 2) 14) (= (select |v_#length_BEFORE_CALL_71| 1) 2))) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_69| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_69| 3) 0) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|)) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (exists ((|v_#length_BEFORE_CALL_69| (Array Int Int))) (and (= 4 (select |v_#length_BEFORE_CALL_69| 3)) (= (select |v_#length_BEFORE_CALL_69| 2) 14) (= (select |v_#length_BEFORE_CALL_69| 1) 2))) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_67| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_67| 3) 0) 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_87| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_107| Int)) (and (or (< 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_107|) (= |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_107| 0)) (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_87| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr40#1_107| 4294967296)))) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_67| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_67| 3) 0) 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_int_BEFORE_CALL_67| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_67| 1) 0) 48) (= (select (select |v_#memory_int_BEFORE_CALL_67| 1) 1) 0))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|))) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.offset| 4) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0))' at error location [2023-11-19 04:48:48,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:48,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:48:48,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-19 04:48:48,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314639501] [2023-11-19 04:48:48,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:48:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:48:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2023-11-19 04:48:48,838 INFO L87 Difference]: Start difference. First operand 219 states and 258 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 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) [2023-11-19 04:48:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:52,548 INFO L93 Difference]: Finished difference Result 223 states and 255 transitions. [2023-11-19 04:48:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:48:52,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 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 50 [2023-11-19 04:48:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:52,558 INFO L225 Difference]: With dead ends: 223 [2023-11-19 04:48:52,559 INFO L226 Difference]: Without dead ends: 218 [2023-11-19 04:48:52,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 04:48:52,560 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 21 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:52,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1074 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 04:48:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-19 04:48:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2023-11-19 04:48:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 114 states have (on average 1.912280701754386) internal successors, (218), 196 states have internal predecessors, (218), 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) [2023-11-19 04:48:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 242 transitions. [2023-11-19 04:48:52,571 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 242 transitions. Word has length 50 [2023-11-19 04:48:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:52,571 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 242 transitions. [2023-11-19 04:48:52,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 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) [2023-11-19 04:48:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 242 transitions. [2023-11-19 04:48:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-19 04:48:52,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:52,573 INFO L195 NwaCegarLoop]: trace histogram [14, 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] [2023-11-19 04:48:52,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:52,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 04:48:52,793 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)] === [2023-11-19 04:48:52,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:52,793 INFO L85 PathProgramCache]: Analyzing trace with hash 367943071, now seen corresponding path program 3 times [2023-11-19 04:48:52,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:52,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584813151] [2023-11-19 04:48:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:52,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:52,847 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:52,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432667773] [2023-11-19 04:48:52,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:48:52,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:52,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:52,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:48:53,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:48:53,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:48:53,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-19 04:48:53,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:53,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 04:48:53,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 04:48:53,489 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 [2023-11-19 04:48:53,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:48:53,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 04:48:53,540 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 04:48:53,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 04:48:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 18 not checked. [2023-11-19 04:48:53,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:53,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584813151] [2023-11-19 04:48:53,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432667773] [2023-11-19 04:48:53,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432667773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67126994] [2023-11-19 04:48:53,654 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-19 04:48:53,654 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:53,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:53,655 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:53,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:54,660 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-19 04:48:54,908 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:56,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5293#(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 [2023-11-19 04:48:56,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:56,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:56,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-19 04:48:56,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945541944] [2023-11-19 04:48:56,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:56,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:48:56,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:56,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:48:56,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=448, Unknown=1, NotChecked=42, Total=552 [2023-11-19 04:48:56,095 INFO L87 Difference]: Start difference. First operand 212 states and 242 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) [2023-11-19 04:48:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:57,399 INFO L93 Difference]: Finished difference Result 302 states and 352 transitions. [2023-11-19 04:48:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:48:57,400 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 62 [2023-11-19 04:48:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:57,405 INFO L225 Difference]: With dead ends: 302 [2023-11-19 04:48:57,408 INFO L226 Difference]: Without dead ends: 302 [2023-11-19 04:48:57,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=581, Unknown=1, NotChecked=48, Total=702 [2023-11-19 04:48:57,410 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 109 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:57,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 335 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1459 Invalid, 0 Unknown, 336 Unchecked, 1.1s Time] [2023-11-19 04:48:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-19 04:48:57,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 210. [2023-11-19 04:48:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 114 states have (on average 1.894736842105263) 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) [2023-11-19 04:48:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2023-11-19 04:48:57,428 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 62 [2023-11-19 04:48:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:57,429 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2023-11-19 04:48:57,429 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) [2023-11-19 04:48:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2023-11-19 04:48:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 04:48:57,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:57,433 INFO L195 NwaCegarLoop]: trace histogram [14, 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] [2023-11-19 04:48:57,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:57,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:48:57,657 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)] === [2023-11-19 04:48:57,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1478653783, now seen corresponding path program 1 times [2023-11-19 04:48:57,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:57,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430494837] [2023-11-19 04:48:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:57,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:57,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:48:57,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641740819] [2023-11-19 04:48:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:57,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:57,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:57,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:57,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:48:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:57,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 04:48:57,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:58,049 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-19 04:48:58,094 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 04:48:58,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 04:48:58,116 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 [2023-11-19 04:48:58,140 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-19 04:48:58,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-19 04:48:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 134 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 47 not checked. [2023-11-19 04:48:58,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:58,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:58,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430494837] [2023-11-19 04:48:58,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:48:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641740819] [2023-11-19 04:48:58,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641740819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036084599] [2023-11-19 04:48:58,371 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-19 04:48:58,371 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:58,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:58,372 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:58,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:59,274 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs [2023-11-19 04:48:59,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:49:00,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6066#(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) (exists ((|v_#memory_$Pointer$.offset_220| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_220| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_$Pointer$.offset_220| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))))) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_220| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_220| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_$Pointer$.base_220| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_int_178| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_178| |ULTIMATE.start_l4_insert_~item~0#1.base| (store (select |v_#memory_int_178| |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|)))))) (<= 0 (+ 4 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))' at error location [2023-11-19 04:49:00,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:49:00,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:49:00,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-19 04:49:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813661627] [2023-11-19 04:49:00,845 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 04:49:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:49:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:49:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=583, Unknown=2, NotChecked=98, Total=756 [2023-11-19 04:49:00,847 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 04:49:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:01,503 INFO L93 Difference]: Finished difference Result 299 states and 349 transitions. [2023-11-19 04:49:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:49:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2023-11-19 04:49:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:01,507 INFO L225 Difference]: With dead ends: 299 [2023-11-19 04:49:01,507 INFO L226 Difference]: Without dead ends: 299 [2023-11-19 04:49:01,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=90, Invalid=727, Unknown=3, NotChecked=110, Total=930 [2023-11-19 04:49:01,508 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 128 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 667 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:01,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1189 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 776 Invalid, 0 Unknown, 667 Unchecked, 0.5s Time] [2023-11-19 04:49:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-19 04:49:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 207. [2023-11-19 04:49:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 114 states have (on average 1.868421052631579) internal successors, (213), 191 states have internal predecessors, (213), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 04:49:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 237 transitions. [2023-11-19 04:49:01,519 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 237 transitions. Word has length 63 [2023-11-19 04:49:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:01,520 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 237 transitions. [2023-11-19 04:49:01,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 04:49:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 237 transitions. [2023-11-19 04:49:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 04:49:01,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:01,521 INFO L195 NwaCegarLoop]: trace histogram [14, 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] [2023-11-19 04:49:01,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:01,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:49:01,738 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)] === [2023-11-19 04:49:01,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1478653782, now seen corresponding path program 1 times [2023-11-19 04:49:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:01,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73642883] [2023-11-19 04:49:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:01,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:01,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:49:01,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509845408] [2023-11-19 04:49:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:01,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:01,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:01,775 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:01,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f4d751-c343-479b-a4a2-55eeb2bd3672/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 04:49:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:02,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-19 04:49:02,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:02,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:49:02,665 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 [2023-11-19 04:49:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:49:02,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 04:49:02,722 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 04:49:02,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 04:49:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 105 proven. 39 refuted. 0 times theorem prover too weak. 68 trivial. 38 not checked. [2023-11-19 04:49:02,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:02,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73642883] [2023-11-19 04:49:02,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:49:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509845408] [2023-11-19 04:49:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509845408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644443376] [2023-11-19 04:49:02,874 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-19 04:49:02,874 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:02,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:02,874 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:02,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:49:03,782 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 15 for LOIs