./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0236.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0236.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:45:02,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:45:02,629 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:45:02,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:45:02,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:45:02,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:45:02,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:45:02,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:45:02,665 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:45:02,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:45:02,666 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:45:02,667 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:45:02,667 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:45:02,668 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:45:02,668 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:45:02,669 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:45:02,669 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:45:02,670 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:45:02,671 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:45:02,671 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:45:02,672 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:45:02,673 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:45:02,673 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:45:02,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:45:02,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:45:02,675 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:45:02,675 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:45:02,676 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:45:02,676 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:45:02,677 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:45:02,677 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:45:02,678 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:45:02,678 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:45:02,678 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:45:02,679 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:45:02,679 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:45:02,679 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:45:02,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:45:02,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:45:02,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:02,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:45:02,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:45:02,681 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:45:02,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:45:02,682 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:45:02,682 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:45:02,682 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_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 [2023-11-12 00:45:02,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:45:02,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:45:02,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:45:02,956 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:45:02,958 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:45:02,959 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/memsafety/test-0236.i [2023-11-12 00:45:06,075 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:45:06,367 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:45:06,368 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/sv-benchmarks/c/memsafety/test-0236.i [2023-11-12 00:45:06,393 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/data/ed992d8a7/a0c6bba3ea0a4888a2bcffed7e1f91aa/FLAG27bc314c6 [2023-11-12 00:45:06,408 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/data/ed992d8a7/a0c6bba3ea0a4888a2bcffed7e1f91aa [2023-11-12 00:45:06,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:45:06,418 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:45:06,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:06,419 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:45:06,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:45:06,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9602c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06, skipping insertion in model container [2023-11-12 00:45:06,427 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,477 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:45:06,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:06,916 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:45:06,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:07,026 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:45:07,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07 WrapperNode [2023-11-12 00:45:07,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:07,030 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:07,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:45:07,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:45:07,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,057 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,096 INFO L138 Inliner]: procedures = 188, calls = 67, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 220 [2023-11-12 00:45:07,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:07,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:45:07,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:45:07,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:45:07,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,115 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,115 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,130 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,136 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,149 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:45:07,157 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:45:07,158 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:45:07,159 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:45:07,159 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (1/1) ... [2023-11-12 00:45:07,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:07,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:07,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:45:07,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:45:07,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:45:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:45:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:45:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:45:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-12 00:45:07,242 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-12 00:45:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:45:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:45:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:45:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:45:07,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:45:07,409 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:45:07,411 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:45:08,124 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:45:08,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:45:08,241 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-12 00:45:08,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:08 BoogieIcfgContainer [2023-11-12 00:45:08,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:45:08,249 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:45:08,250 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:45:08,253 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:45:08,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:45:06" (1/3) ... [2023-11-12 00:45:08,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef3509a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:08, skipping insertion in model container [2023-11-12 00:45:08,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:07" (2/3) ... [2023-11-12 00:45:08,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef3509a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:08, skipping insertion in model container [2023-11-12 00:45:08,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:08" (3/3) ... [2023-11-12 00:45:08,256 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0236.i [2023-11-12 00:45:08,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:45:08,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2023-11-12 00:45:08,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:08,331 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;@79a440b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:08,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-11-12 00:45:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 180 states, 83 states have (on average 2.325301204819277) internal successors, (193), 172 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:45:08,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:08,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:45:08,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:08,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:08,353 INFO L85 PathProgramCache]: Analyzing trace with hash 378247, now seen corresponding path program 1 times [2023-11-12 00:45:08,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:08,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444356154] [2023-11-12 00:45:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:08,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:08,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444356154] [2023-11-12 00:45:08,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444356154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:08,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:08,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:45:08,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837205264] [2023-11-12 00:45:08,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:08,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:45:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:08,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:45:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:45:08,631 INFO L87 Difference]: Start difference. First operand has 180 states, 83 states have (on average 2.325301204819277) internal successors, (193), 172 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:08,777 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2023-11-12 00:45:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:45:08,781 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-12 00:45:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:08,796 INFO L225 Difference]: With dead ends: 180 [2023-11-12 00:45:08,796 INFO L226 Difference]: Without dead ends: 179 [2023-11-12 00:45:08,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:45:08,807 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:08,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 170 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:45:08,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-12 00:45:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-12 00:45:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 171 states have internal predecessors, (182), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2023-11-12 00:45:08,899 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 3 [2023-11-12 00:45:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:08,899 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2023-11-12 00:45:08,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2023-11-12 00:45:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:45:08,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:08,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:45:08,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:45:08,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:08,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:08,903 INFO L85 PathProgramCache]: Analyzing trace with hash 358839889, now seen corresponding path program 1 times [2023-11-12 00:45:08,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:08,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925963533] [2023-11-12 00:45:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:08,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:08,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:08,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594184968] [2023-11-12 00:45:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:08,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:08,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:08,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:08,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:45:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:09,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:45:09,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:09,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:45:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:09,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:09,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:09,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925963533] [2023-11-12 00:45:09,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594184968] [2023-11-12 00:45:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594184968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:09,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:09,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:45:09,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226413394] [2023-11-12 00:45:09,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:09,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:09,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:09,179 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:09,420 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2023-11-12 00:45:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:09,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:45:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:09,426 INFO L225 Difference]: With dead ends: 178 [2023-11-12 00:45:09,426 INFO L226 Difference]: Without dead ends: 178 [2023-11-12 00:45:09,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:09,430 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 4 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:09,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 270 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:45:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-12 00:45:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2023-11-12 00:45:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 83 states have (on average 2.180722891566265) internal successors, (181), 170 states have internal predecessors, (181), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2023-11-12 00:45:09,463 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 5 [2023-11-12 00:45:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:09,465 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2023-11-12 00:45:09,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2023-11-12 00:45:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:45:09,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:09,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:45:09,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:45:09,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:09,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:09,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:09,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1760864977, now seen corresponding path program 1 times [2023-11-12 00:45:09,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:09,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970744354] [2023-11-12 00:45:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:09,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:09,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185645262] [2023-11-12 00:45:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:09,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:09,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:09,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:45:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:09,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 00:45:09,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:09,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 00:45:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:09,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:09,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970744354] [2023-11-12 00:45:09,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185645262] [2023-11-12 00:45:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185645262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:09,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:09,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:45:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608207401] [2023-11-12 00:45:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:09,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:45:09,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:45:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:09,919 INFO L87 Difference]: Start difference. First operand 178 states and 193 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:10,200 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2023-11-12 00:45:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:45:10,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:45:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:10,203 INFO L225 Difference]: With dead ends: 183 [2023-11-12 00:45:10,203 INFO L226 Difference]: Without dead ends: 183 [2023-11-12 00:45:10,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:45:10,207 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 7 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:10,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 430 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:45:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-12 00:45:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2023-11-12 00:45:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 87 states have (on average 2.1379310344827585) internal successors, (186), 174 states have internal predecessors, (186), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:10,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 198 transitions. [2023-11-12 00:45:10,230 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 198 transitions. Word has length 6 [2023-11-12 00:45:10,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:10,230 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 198 transitions. [2023-11-12 00:45:10,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:10,231 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 198 transitions. [2023-11-12 00:45:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:45:10,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:10,238 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:10,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:10,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:10,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2018843385, now seen corresponding path program 1 times [2023-11-12 00:45:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:10,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288565523] [2023-11-12 00:45:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:10,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:10,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636388193] [2023-11-12 00:45:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:10,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:10,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:10,524 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:10,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:45:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:10,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 00:45:10,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:10,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:45:10,950 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-12 00:45:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:45:11,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:11,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:11,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288565523] [2023-11-12 00:45:11,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636388193] [2023-11-12 00:45:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636388193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:11,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:11,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:45:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747709913] [2023-11-12 00:45:11,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:45:11,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:45:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:45:11,104 INFO L87 Difference]: Start difference. First operand 183 states and 198 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:45:13,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:45:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:14,242 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2023-11-12 00:45:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:45:14,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2023-11-12 00:45:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:14,244 INFO L225 Difference]: With dead ends: 187 [2023-11-12 00:45:14,245 INFO L226 Difference]: Without dead ends: 185 [2023-11-12 00:45:14,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:45:14,246 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 4 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:14,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 593 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 172 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-11-12 00:45:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-12 00:45:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-11-12 00:45:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 176 states have internal predecessors, (188), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2023-11-12 00:45:14,257 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 45 [2023-11-12 00:45:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:14,257 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2023-11-12 00:45:14,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:45:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2023-11-12 00:45:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:45:14,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:14,259 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:14,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:14,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:14,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:14,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2023413647, now seen corresponding path program 1 times [2023-11-12 00:45:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:14,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053225661] [2023-11-12 00:45:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:14,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:14,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198520801] [2023-11-12 00:45:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:14,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:14,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:14,513 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:14,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:45:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:14,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 00:45:14,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:14,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:45:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-12 00:45:14,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:14,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053225661] [2023-11-12 00:45:14,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198520801] [2023-11-12 00:45:14,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198520801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:14,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:14,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:45:14,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811804967] [2023-11-12 00:45:14,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:45:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:45:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:14,948 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 00:45:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:15,146 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2023-11-12 00:45:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:45:15,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 50 [2023-11-12 00:45:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:15,148 INFO L225 Difference]: With dead ends: 184 [2023-11-12 00:45:15,148 INFO L226 Difference]: Without dead ends: 184 [2023-11-12 00:45:15,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:45:15,149 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 7 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:15,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 422 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:45:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-12 00:45:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-11-12 00:45:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 89 states have (on average 2.101123595505618) internal successors, (187), 175 states have internal predecessors, (187), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2023-11-12 00:45:15,158 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 50 [2023-11-12 00:45:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:15,159 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2023-11-12 00:45:15,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 00:45:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2023-11-12 00:45:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:45:15,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:15,161 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:15,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:15,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:15,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:15,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2022598511, now seen corresponding path program 1 times [2023-11-12 00:45:15,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:15,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877049471] [2023-11-12 00:45:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:15,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:15,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:15,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639940585] [2023-11-12 00:45:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:15,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:15,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:15,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:15,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:45:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:15,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:45:15,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:15,731 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-12 00:45:15,765 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 00:45:15,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-12 00:45:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 6 not checked. [2023-11-12 00:45:15,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:16,043 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 00:45:16,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-12 00:45:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-12 00:45:16,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:16,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877049471] [2023-11-12 00:45:16,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:16,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639940585] [2023-11-12 00:45:16,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639940585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:16,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017281281] [2023-11-12 00:45:16,084 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:45:16,085 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:16,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:16,095 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:16,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:20,234 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 64 for LOIs [2023-11-12 00:45:20,620 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:20,632 WARN L876 $PredicateComparison]: unable to prove that (and (= 3 |c_ULTIMATE.start_l0_insert_~list#1.base|) (= |c_ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_~list#1.offset| 8) (= |c_ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_~list#1.offset| 0) (let ((.cse0 (= |c_ULTIMATE.start_l4_insert_#in~list#1.base| |c_ULTIMATE.start_l3_insert_~item~1#1.base|)) (.cse1 (not (= 0 |c_ULTIMATE.start_l3_insert_~item~1#1.base|))) (.cse2 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse3 (= |c_ULTIMATE.start_l2_insert_~item~2#1.base| |c_ULTIMATE.start_l3_insert_#in~list#1.base|)) (.cse4 (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_38| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_38| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49| 4294967296)) (<= 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49|)))) (.cse5 (= |c_ULTIMATE.start_l2_insert_~list#1.base| |c_ULTIMATE.start_l2_insert_#in~list#1.base|)) (.cse6 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse7 (= |c_ULTIMATE.start_l1_insert_~list#1.base| |c_ULTIMATE.start_l1_insert_#in~list#1.base|)) (.cse8 (not (= |c_ULTIMATE.start_l0_insert_~item~4#1.base| 0))) (.cse9 (not (= |c_ULTIMATE.start_l1_insert_~item~3#1.base| 0))) (.cse10 (= |c_ULTIMATE.start_l3_insert_#in~list#1.base| |c_ULTIMATE.start_l3_insert_~list#1.base|)) (.cse11 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse12 (not (= |c_ULTIMATE.start_l4_insert_~item~0#1.base| 0))) (.cse13 (not (= |c_ULTIMATE.start_l4_insert_#t~ret7#1.base| 0))) (.cse14 (not (= |c_ULTIMATE.start_l2_insert_~item~2#1.base| 0))) (.cse15 (= |c_ULTIMATE.start_l1_insert_#in~list#1.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|)) (.cse16 (= (select |c_ULTIMATE.start_main_old_#valid#1| 3) 1)) (.cse18 (= |c_ULTIMATE.start_l2_insert_#in~list#1.base| |c_ULTIMATE.start_l1_insert_~item~3#1.base|)) (.cse19 (= |c_ULTIMATE.start_l4_insert_#in~list#1.base| |c_ULTIMATE.start_l4_insert_~list#1.base|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_4| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_4| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_4| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_4| 3) 0) 0)) .cse9 .cse10 (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_4| 1)) (= (select |v_#length_BEFORE_CALL_4| 3) 4) (= 12 (select |v_#length_BEFORE_CALL_4| 2)))) .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 (exists ((|v_#memory_int_BEFORE_CALL_4| (Array Int (Array Int Int)))) (let ((.cse17 (select |v_#memory_int_BEFORE_CALL_4| 1))) (and (= (select .cse17 1) 0) (= 48 (select .cse17 0))))) .cse18 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_2| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_2| 3) 0) 0)) .cse10 .cse11 (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_2| 3) 4) (= (select |v_#length_BEFORE_CALL_2| 1) 2) (= (select |v_#length_BEFORE_CALL_2| 2) 12))) .cse12 .cse13 .cse14 .cse15 (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_2| 3) 0) 0)) .cse16 (exists ((|v_#memory_int_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse20 (select |v_#memory_int_BEFORE_CALL_2| 1))) (and (= (select .cse20 0) 48) (= (select .cse20 1) 0)))) .cse18 .cse19))) (= 8 |c_ULTIMATE.start_l3_insert_#in~list#1.offset|) (= |c_ULTIMATE.start_l0_insert_#in~list#1.base| 3) (= 3 |c_~#list~0.base|) (= |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |c_ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (= 8 |c_ULTIMATE.start_l3_insert_~list#1.offset|) (= |c_ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (= |c_ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |c_ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (not (= (select |c_#valid| |c_ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |c_ULTIMATE.start_l3_insert_~item~1#1.offset| 0)) is different from true [2023-11-12 00:45:26,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2664#(and (= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= 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|) (or (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_38| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_38| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49| 4294967296)) (<= 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49|))) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_4| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_4| 3) 0) 0)) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_4| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_4| 3) 0) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (and (= 2 (select |v_#length_BEFORE_CALL_4| 1)) (= (select |v_#length_BEFORE_CALL_4| 3) 4) (= 12 (select |v_#length_BEFORE_CALL_4| 2)))) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (exists ((|v_#memory_int_BEFORE_CALL_4| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_4| 1) 1) 0) (= 48 (select (select |v_#memory_int_BEFORE_CALL_4| 1) 0))))) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_38| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_38| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49| 4294967296)) (<= 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_49|))) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_2| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_2| 3) 0) 0)) (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_2| 3) 4) (= (select |v_#length_BEFORE_CALL_2| 1) 2) (= (select |v_#length_BEFORE_CALL_2| 2) 12))) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_2| 3) 0) 0)) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (exists ((|v_#memory_int_BEFORE_CALL_2| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_2| 1) 0) 48) (= (select (select |v_#memory_int_BEFORE_CALL_2| 1) 1) 0))) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|))) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|))' at error location [2023-11-12 00:45:26,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:26,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:45:26,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2023-11-12 00:45:26,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261091774] [2023-11-12 00:45:26,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:26,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:45:26,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:45:26,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=848, Unknown=11, NotChecked=122, Total=1122 [2023-11-12 00:45:26,175 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:45:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:26,878 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2023-11-12 00:45:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:45:26,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2023-11-12 00:45:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:26,880 INFO L225 Difference]: With dead ends: 180 [2023-11-12 00:45:26,880 INFO L226 Difference]: Without dead ends: 180 [2023-11-12 00:45:26,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=153, Invalid=962, Unknown=15, NotChecked=130, Total=1260 [2023-11-12 00:45:26,882 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 22 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:26,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 927 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 709 Invalid, 0 Unknown, 184 Unchecked, 0.6s Time] [2023-11-12 00:45:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-12 00:45:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-12 00:45:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 89 states have (on average 2.056179775280899) internal successors, (183), 171 states have internal predecessors, (183), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2023-11-12 00:45:26,889 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 54 [2023-11-12 00:45:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:26,890 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2023-11-12 00:45:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:45:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2023-11-12 00:45:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:45:26,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:26,893 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:26,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:27,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:27,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:27,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:27,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2022598510, now seen corresponding path program 1 times [2023-11-12 00:45:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:27,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968288558] [2023-11-12 00:45:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:27,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:27,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:27,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372370496] [2023-11-12 00:45:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:27,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:27,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:27,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:45:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:27,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:45:27,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:27,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:45:27,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-12 00:45:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 85 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:45:27,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:45:27,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:27,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968288558] [2023-11-12 00:45:27,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:27,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372370496] [2023-11-12 00:45:27,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372370496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:27,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929388141] [2023-11-12 00:45:27,861 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:45:27,861 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:27,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:27,863 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:27,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:29,587 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 64 for LOIs [2023-11-12 00:45:29,902 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:31,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3380#(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|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (< (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) 0)))' at error location [2023-11-12 00:45:31,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:31,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:45:31,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-11-12 00:45:31,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473770525] [2023-11-12 00:45:31,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:31,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:45:31,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:31,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:45:31,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:45:31,280 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:45:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:31,680 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2023-11-12 00:45:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:45:31,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 54 [2023-11-12 00:45:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:31,682 INFO L225 Difference]: With dead ends: 190 [2023-11-12 00:45:31,682 INFO L226 Difference]: Without dead ends: 186 [2023-11-12 00:45:31,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:45:31,684 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 10 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:31,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 738 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:45:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-12 00:45:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2023-11-12 00:45:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 177 states have internal predecessors, (189), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2023-11-12 00:45:31,691 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 54 [2023-11-12 00:45:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:31,691 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2023-11-12 00:45:31,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:45:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2023-11-12 00:45:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 00:45:31,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:31,694 INFO L195 NwaCegarLoop]: trace histogram [24, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:31,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 00:45:31,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:31,902 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:31,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash 280114206, now seen corresponding path program 2 times [2023-11-12 00:45:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717206631] [2023-11-12 00:45:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:31,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:31,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508203140] [2023-11-12 00:45:31,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:45:31,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:31,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:31,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:31,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:45:32,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:45:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:32,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 00:45:32,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:32,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:45:32,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-12 00:45:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 140 proven. 10 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-11-12 00:45:32,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 140 proven. 10 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-11-12 00:45:33,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:33,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717206631] [2023-11-12 00:45:33,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:33,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508203140] [2023-11-12 00:45:33,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508203140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:33,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250545454] [2023-11-12 00:45:33,078 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:45:33,078 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:33,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:33,079 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:33,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:35,996 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 64 for LOIs [2023-11-12 00:45:36,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:42,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4218#(and (= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (or (and (exists ((|v_#memory_int_BEFORE_CALL_62| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_BEFORE_CALL_62| 1) 0) 48) (= (select (select |v_#memory_int_BEFORE_CALL_62| 1) 1) 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|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_146| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_85| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_85| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_146| 4294967296)) (<= 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_146|))) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_62| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_62| 3) 0) 0)) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_62| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_62| 3) 0) 0)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (exists ((|v_#length_BEFORE_CALL_62| (Array Int Int))) (and (= 4 (select |v_#length_BEFORE_CALL_62| 3)) (= (select |v_#length_BEFORE_CALL_62| 1) 2) (= (select |v_#length_BEFORE_CALL_62| 2) 12))) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|)) (and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (exists ((|v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_146| Int) (|v_zalloc_or_die_#Ultimate.C_memset_#amount#1_85| Int)) (and (<= (mod |v_zalloc_or_die_#Ultimate.C_memset_#amount#1_85| 4294967296) (mod |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_146| 4294967296)) (<= 0 |v_zalloc_or_die_#Ultimate.C_memset_#t~loopctr35#1_146|))) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (exists ((|v_#memory_$Pointer$.base_BEFORE_CALL_64| (Array Int (Array Int Int)))) (= 0 (select (select |v_#memory_$Pointer$.base_BEFORE_CALL_64| 3) 0))) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_64| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_64| 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_64| (Array Int (Array Int Int)))) (and (= 48 (select (select |v_#memory_int_BEFORE_CALL_64| 1) 0)) (= (select (select |v_#memory_int_BEFORE_CALL_64| 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|) (exists ((|v_#length_BEFORE_CALL_64| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_64| 3) 4) (= (select |v_#length_BEFORE_CALL_64| 2) 12) (= 2 (select |v_#length_BEFORE_CALL_64| 1)))))) (= |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|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) 11) (= |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) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|))' at error location [2023-11-12 00:45:42,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:42,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:45:42,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-12 00:45:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694273932] [2023-11-12 00:45:42,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:42,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:45:42,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:42,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:45:42,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1199, Unknown=8, NotChecked=0, Total=1406 [2023-11-12 00:45:42,625 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 00:45:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:44,089 INFO L93 Difference]: Finished difference Result 196 states and 215 transitions. [2023-11-12 00:45:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 00:45:44,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 72 [2023-11-12 00:45:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:44,095 INFO L225 Difference]: With dead ends: 196 [2023-11-12 00:45:44,095 INFO L226 Difference]: Without dead ends: 193 [2023-11-12 00:45:44,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=424, Invalid=2425, Unknown=13, NotChecked=0, Total=2862 [2023-11-12 00:45:44,097 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 38 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:44,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1003 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:45:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-12 00:45:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-11-12 00:45:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 102 states have (on average 1.9215686274509804) internal successors, (196), 184 states have internal predecessors, (196), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 208 transitions. [2023-11-12 00:45:44,105 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 208 transitions. Word has length 72 [2023-11-12 00:45:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:44,106 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 208 transitions. [2023-11-12 00:45:44,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 00:45:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 208 transitions. [2023-11-12 00:45:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-12 00:45:44,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:44,108 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:44,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:44,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:45:44,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:44,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1473855924, now seen corresponding path program 3 times [2023-11-12 00:45:44,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:44,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716506091] [2023-11-12 00:45:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:44,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:44,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835164611] [2023-11-12 00:45:44,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:45:44,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:44,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:44,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:44,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:45:45,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:45:45,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:45,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-12 00:45:45,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:45,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:45:45,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-12 00:45:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 481 proven. 145 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-11-12 00:45:46,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 156 proven. 84 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2023-11-12 00:45:46,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:46,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716506091] [2023-11-12 00:45:46,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:46,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835164611] [2023-11-12 00:45:46,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835164611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:46,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981278217] [2023-11-12 00:45:46,491 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:45:46,492 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:46,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:46,493 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:46,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:47,408 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 64 for LOIs [2023-11-12 00:45:47,620 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:49,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5176#(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|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (< (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|) 0)))' at error location [2023-11-12 00:45:49,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:49,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:45:49,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2023-11-12 00:45:49,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000127245] [2023-11-12 00:45:49,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:49,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 00:45:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 00:45:49,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 00:45:49,324 INFO L87 Difference]: Start difference. First operand 193 states and 208 transitions. Second operand has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:45:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:51,548 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2023-11-12 00:45:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:45:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2023-11-12 00:45:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:51,550 INFO L225 Difference]: With dead ends: 202 [2023-11-12 00:45:51,550 INFO L226 Difference]: Without dead ends: 200 [2023-11-12 00:45:51,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 208 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=452, Invalid=2410, Unknown=0, NotChecked=0, Total=2862 [2023-11-12 00:45:51,552 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 32 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2398 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:51,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2398 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:45:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-12 00:45:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-11-12 00:45:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 109 states have (on average 1.8623853211009174) internal successors, (203), 191 states have internal predecessors, (203), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:45:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 215 transitions. [2023-11-12 00:45:51,560 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 215 transitions. Word has length 83 [2023-11-12 00:45:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:51,561 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 215 transitions. [2023-11-12 00:45:51,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:45:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 215 transitions. [2023-11-12 00:45:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-12 00:45:51,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:51,563 INFO L195 NwaCegarLoop]: trace histogram [70, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:51,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:51,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:51,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-12 00:45:51,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1149370078, now seen corresponding path program 4 times [2023-11-12 00:45:51,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:51,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920025712] [2023-11-12 00:45:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:51,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:51,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:51,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408045381] [2023-11-12 00:45:51,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:45:51,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:51,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:51,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:51,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea87e806-2376-4119-acdb-3ae093093ad0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:45:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:58,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 89 conjunts are in the unsatisfiable core [2023-11-12 00:45:58,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:58,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1