./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:15:48,609 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:15:48,751 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 04:15:48,759 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:15:48,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:15:48,806 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:15:48,807 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:15:48,808 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:15:48,809 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:15:48,815 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:15:48,816 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:15:48,816 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:15:48,817 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:15:48,819 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:15:48,820 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:15:48,820 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:15:48,821 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:15:48,821 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:15:48,822 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:15:48,822 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:15:48,823 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:15:48,824 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:15:48,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:15:48,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:15:48,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:15:48,827 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:15:48,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:15:48,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:15:48,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:15:48,829 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 04:15:48,831 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 04:15:48,831 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 04:15:48,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:15:48,832 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:15:48,832 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:15:48,832 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:15:48,833 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:15:48,833 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:15:48,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:15:48,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:15:48,834 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:15:48,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:15:48,835 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:15:48,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:15:48,836 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:15:48,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:15:48,837 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_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c [2023-11-19 04:15:49,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:15:49,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:15:49,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:15:49,205 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:15:49,207 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:15:49,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2023-11-19 04:15:52,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:15:52,564 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:15:52,565 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2023-11-19 04:15:52,580 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/data/4ec33d939/2305fc5fcbfb440b9e0b0a635782b198/FLAG7331cdada [2023-11-19 04:15:52,593 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/data/4ec33d939/2305fc5fcbfb440b9e0b0a635782b198 [2023-11-19 04:15:52,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:15:52,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:15:52,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:15:52,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:15:52,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:15:52,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:15:52" (1/1) ... [2023-11-19 04:15:52,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f9c122a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:52, skipping insertion in model container [2023-11-19 04:15:52,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:15:52" (1/1) ... [2023-11-19 04:15:52,654 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:15:53,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:15:53,014 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:15:53,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:15:53,114 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:15:53,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53 WrapperNode [2023-11-19 04:15:53,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:15:53,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:15:53,116 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:15:53,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:15:53,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,159 INFO L138 Inliner]: procedures = 124, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-19 04:15:53,159 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:15:53,160 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:15:53,160 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:15:53,160 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:15:53,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,172 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,172 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,180 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,184 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:15:53,190 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:15:53,190 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:15:53,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:15:53,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (1/1) ... [2023-11-19 04:15:53,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:15:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:53,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:15:53,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:15:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-19 04:15:53,278 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-19 04:15:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:15:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:15:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:15:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:15:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:15:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:15:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:15:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:15:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:15:53,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:15:53,393 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:15:53,395 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:15:53,436 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-19 04:15:53,682 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:15:53,730 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:15:53,730 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 04:15:53,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:15:53 BoogieIcfgContainer [2023-11-19 04:15:53,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:15:53,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:15:53,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:15:53,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:15:53,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:15:52" (1/3) ... [2023-11-19 04:15:53,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c458de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:15:53, skipping insertion in model container [2023-11-19 04:15:53,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:53" (2/3) ... [2023-11-19 04:15:53,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c458de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:15:53, skipping insertion in model container [2023-11-19 04:15:53,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:15:53" (3/3) ... [2023-11-19 04:15:53,744 INFO L112 eAbstractionObserver]: Analyzing ICFG simple-ext_1.i [2023-11-19 04:15:53,764 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:15:53,764 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-11-19 04:15:53,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:15:53,822 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;@1031b196, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:15:53,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-19 04:15:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:15:53,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:53,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:15:53,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:15:53,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:53,842 INFO L85 PathProgramCache]: Analyzing trace with hash 152784298, now seen corresponding path program 1 times [2023-11-19 04:15:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:53,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239229251] [2023-11-19 04:15:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:53,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:54,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:54,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239229251] [2023-11-19 04:15:54,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239229251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:54,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:54,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:15:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618894058] [2023-11-19 04:15:54,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:54,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:15:54,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:15:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:15:54,059 INFO L87 Difference]: Start difference. First operand has 50 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:54,144 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-11-19 04:15:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:15:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-11-19 04:15:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:54,154 INFO L225 Difference]: With dead ends: 49 [2023-11-19 04:15:54,154 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 04:15:54,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:15:54,163 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:54,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 04:15:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-19 04:15:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 2.0) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-11-19 04:15:54,217 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 5 [2023-11-19 04:15:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:54,217 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-11-19 04:15:54,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-11-19 04:15:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:15:54,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:54,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:15:54,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:15:54,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:15:54,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 441429789, now seen corresponding path program 1 times [2023-11-19 04:15:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:54,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435491462] [2023-11-19 04:15:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:54,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435491462] [2023-11-19 04:15:54,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435491462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:54,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:54,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:15:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947663972] [2023-11-19 04:15:54,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:54,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:15:54,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:15:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:15:54,402 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:54,539 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-11-19 04:15:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:15:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-19 04:15:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:54,541 INFO L225 Difference]: With dead ends: 58 [2023-11-19 04:15:54,542 INFO L226 Difference]: Without dead ends: 58 [2023-11-19 04:15:54,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:54,544 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:54,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 15 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-19 04:15:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2023-11-19 04:15:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2023-11-19 04:15:54,552 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 6 [2023-11-19 04:15:54,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:54,553 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2023-11-19 04:15:54,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2023-11-19 04:15:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:15:54,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:54,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:15:54,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:15:54,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:15:54,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash 441429790, now seen corresponding path program 1 times [2023-11-19 04:15:54,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:54,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935751634] [2023-11-19 04:15:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:54,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:54,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935751634] [2023-11-19 04:15:54,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935751634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:54,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:54,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:15:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689303148] [2023-11-19 04:15:54,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:54,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:15:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:15:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:15:54,793 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:54,935 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2023-11-19 04:15:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:15:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-19 04:15:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:54,937 INFO L225 Difference]: With dead ends: 88 [2023-11-19 04:15:54,937 INFO L226 Difference]: Without dead ends: 88 [2023-11-19 04:15:54,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:54,939 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:54,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 41 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-19 04:15:54,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2023-11-19 04:15:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 60 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2023-11-19 04:15:54,949 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 6 [2023-11-19 04:15:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:54,949 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2023-11-19 04:15:54,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2023-11-19 04:15:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:15:54,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:54,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:54,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:15:54,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:15:54,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash -22545481, now seen corresponding path program 1 times [2023-11-19 04:15:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:54,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157837494] [2023-11-19 04:15:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:55,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:55,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157837494] [2023-11-19 04:15:55,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157837494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:55,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:55,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:15:55,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216421950] [2023-11-19 04:15:55,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:55,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:15:55,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:15:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:15:55,065 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:55,191 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2023-11-19 04:15:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:15:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-19 04:15:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:55,197 INFO L225 Difference]: With dead ends: 74 [2023-11-19 04:15:55,197 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 04:15:55,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:55,201 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:55,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 30 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 04:15:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2023-11-19 04:15:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.6) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:55,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2023-11-19 04:15:55,209 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 10 [2023-11-19 04:15:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:55,209 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2023-11-19 04:15:55,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2023-11-19 04:15:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:15:55,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:55,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:55,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:15:55,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:15:55,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash -260800418, now seen corresponding path program 1 times [2023-11-19 04:15:55,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:55,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029414598] [2023-11-19 04:15:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:55,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:55,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:55,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029414598] [2023-11-19 04:15:55,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029414598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:55,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:55,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:15:55,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318891606] [2023-11-19 04:15:55,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:55,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:15:55,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:55,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:15:55,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:15:55,674 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:55,946 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2023-11-19 04:15:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:15:55,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2023-11-19 04:15:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:55,948 INFO L225 Difference]: With dead ends: 68 [2023-11-19 04:15:55,948 INFO L226 Difference]: Without dead ends: 68 [2023-11-19 04:15:55,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:15:55,957 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:55,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 75 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:15:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-19 04:15:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2023-11-19 04:15:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-11-19 04:15:55,970 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 12 [2023-11-19 04:15:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:55,970 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-11-19 04:15:55,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-11-19 04:15:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:15:55,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:55,972 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:55,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:15:55,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:15:55,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:55,973 INFO L85 PathProgramCache]: Analyzing trace with hash -613547481, now seen corresponding path program 1 times [2023-11-19 04:15:55,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:55,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555290444] [2023-11-19 04:15:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:55,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:56,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555290444] [2023-11-19 04:15:56,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555290444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:56,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:56,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:15:56,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427603052] [2023-11-19 04:15:56,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:56,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:15:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:15:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:56,117 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:56,256 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-11-19 04:15:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:15:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2023-11-19 04:15:56,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:56,258 INFO L225 Difference]: With dead ends: 66 [2023-11-19 04:15:56,261 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 04:15:56,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:15:56,262 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:56,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 04:15:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2023-11-19 04:15:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2023-11-19 04:15:56,274 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 12 [2023-11-19 04:15:56,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:56,275 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2023-11-19 04:15:56,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:56,275 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2023-11-19 04:15:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:15:56,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:56,276 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:56,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:15:56,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:15:56,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:56,278 INFO L85 PathProgramCache]: Analyzing trace with hash -613547480, now seen corresponding path program 1 times [2023-11-19 04:15:56,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:56,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393131470] [2023-11-19 04:15:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:56,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:56,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:56,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393131470] [2023-11-19 04:15:56,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393131470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:56,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:56,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:15:56,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419607407] [2023-11-19 04:15:56,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:56,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:15:56,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:15:56,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:15:56,512 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:56,683 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-11-19 04:15:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:15:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2023-11-19 04:15:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:56,684 INFO L225 Difference]: With dead ends: 61 [2023-11-19 04:15:56,684 INFO L226 Difference]: Without dead ends: 61 [2023-11-19 04:15:56,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:15:56,688 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:56,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-19 04:15:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2023-11-19 04:15:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-11-19 04:15:56,703 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 12 [2023-11-19 04:15:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:56,704 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-11-19 04:15:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-11-19 04:15:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:15:56,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:56,705 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:56,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:15:56,705 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:15:56,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 503825842, now seen corresponding path program 1 times [2023-11-19 04:15:56,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:56,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411059452] [2023-11-19 04:15:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:56,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411059452] [2023-11-19 04:15:56,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411059452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:15:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240621996] [2023-11-19 04:15:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:56,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:57,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:15:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:57,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:15:57,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:57,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 04:15:57,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 04:15:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:57,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:15:57,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-11-19 04:15:57,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2023-11-19 04:15:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:57,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240621996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:15:57,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053737659] [2023-11-19 04:15:57,596 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:15:57,597 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:15:57,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:15:57,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:15:57,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:15:58,104 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:06,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1053737659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:06,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:16:06,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7] total 20 [2023-11-19 04:16:06,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408973189] [2023-11-19 04:16:06,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:06,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:16:06,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:16:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=291, Unknown=8, NotChecked=0, Total=420 [2023-11-19 04:16:06,041 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:08,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:16:10,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:16:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:10,854 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-19 04:16:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:16:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 13 [2023-11-19 04:16:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:10,855 INFO L225 Difference]: With dead ends: 56 [2023-11-19 04:16:10,855 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 04:16:10,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=121, Invalid=291, Unknown=8, NotChecked=0, Total=420 [2023-11-19 04:16:10,857 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:10,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 11 Unknown, 0 Unchecked, 4.8s Time] [2023-11-19 04:16:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 04:16:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2023-11-19 04:16:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.394736842105263) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-11-19 04:16:10,862 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 13 [2023-11-19 04:16:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:10,863 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-11-19 04:16:10,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-11-19 04:16:10,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:16:10,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:10,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:10,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:16:11,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:11,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:16:11,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1152457737, now seen corresponding path program 1 times [2023-11-19 04:16:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:11,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253821511] [2023-11-19 04:16:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:11,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:16:11,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253821511] [2023-11-19 04:16:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253821511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:11,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:16:11,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:16:11,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269899142] [2023-11-19 04:16:11,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:11,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:16:11,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:11,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:16:11,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:16:11,182 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:11,287 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2023-11-19 04:16:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:16:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 15 [2023-11-19 04:16:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:11,288 INFO L225 Difference]: With dead ends: 63 [2023-11-19 04:16:11,289 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 04:16:11,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:16:11,290 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:11,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 22 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:16:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 04:16:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2023-11-19 04:16:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-11-19 04:16:11,294 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 15 [2023-11-19 04:16:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:11,294 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-11-19 04:16:11,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-11-19 04:16:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:16:11,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:11,296 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:11,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:16:11,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:16:11,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:11,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1187902623, now seen corresponding path program 1 times [2023-11-19 04:16:11,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:11,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333392522] [2023-11-19 04:16:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:11,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:11,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:11,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333392522] [2023-11-19 04:16:11,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333392522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:16:11,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465700401] [2023-11-19 04:16:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:11,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:11,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:11,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:11,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:16:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:11,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 04:16:11,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:11,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:16:11,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:16:11,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2023-11-19 04:16:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:12,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465700401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:16:12,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836522065] [2023-11-19 04:16:12,114 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:16:12,114 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:16:12,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:16:12,115 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:16:12,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:16:14,390 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:21,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1369#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_82| Int) (|v_#memory_$Pointer$.base_44| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_43| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_44| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~i~0#1_47| Int) (|v_#memory_$Pointer$.offset_43| (Array Int (Array Int Int))) (|v_#memory_int_37| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_73| Int)) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_82| (store (select |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_82|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 4) 0))) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_73|) (= (store |v_#memory_$Pointer$.offset_43| |v_ULTIMATE.start_main_~p~0#1.base_82| (store (select |v_#memory_$Pointer$.offset_43| |v_ULTIMATE.start_main_~p~0#1.base_82|) |v_ULTIMATE.start_main_~p~0#1.offset_73| (select (select |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_82|) |v_ULTIMATE.start_main_~p~0#1.offset_73|))) |v_#memory_$Pointer$.offset_44|) (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 8) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_82|)) (= (store |v_#memory_$Pointer$.base_43| |v_ULTIMATE.start_main_~p~0#1.base_82| (store (select |v_#memory_$Pointer$.base_43| |v_ULTIMATE.start_main_~p~0#1.base_82|) |v_ULTIMATE.start_main_~p~0#1.offset_73| (select (select |v_#memory_$Pointer$.base_44| |v_ULTIMATE.start_main_~p~0#1.base_82|) |v_ULTIMATE.start_main_~p~0#1.offset_73|))) |v_#memory_$Pointer$.base_44|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_82|) 1) (= |#memory_int| (store |v_#memory_int_37| |v_ULTIMATE.start_main_~p~0#1.base_82| (store (store (select |v_#memory_int_37| |v_ULTIMATE.start_main_~p~0#1.base_82|) |v_ULTIMATE.start_main_~p~0#1.offset_73| |v_ULTIMATE.start_main_~i~0#1_47|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_82|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 4))))) (= (store |v_#memory_$Pointer$.base_44| |v_ULTIMATE.start_main_~p~0#1.base_82| (store (select |v_#memory_$Pointer$.base_44| |v_ULTIMATE.start_main_~p~0#1.base_82|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 4) 0)) |#memory_$Pointer$.base|))) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (or (< |ULTIMATE.start_main_~p~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~p~0#1.base|) (+ |ULTIMATE.start_main_~p~0#1.offset| 4))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (or (not (= |ULTIMATE.start_main_~p~0#1.offset| 0)) (not (= 0 |ULTIMATE.start_main_~p~0#1.base|))))' at error location [2023-11-19 04:16:21,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:16:21,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:16:21,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 13 [2023-11-19 04:16:21,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247628946] [2023-11-19 04:16:21,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:16:21,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 04:16:21,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:21,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 04:16:21,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=544, Unknown=2, NotChecked=0, Total=650 [2023-11-19 04:16:21,919 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:22,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:22,187 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2023-11-19 04:16:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:16:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 15 [2023-11-19 04:16:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:22,188 INFO L225 Difference]: With dead ends: 63 [2023-11-19 04:16:22,188 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 04:16:22,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=139, Invalid=671, Unknown=2, NotChecked=0, Total=812 [2023-11-19 04:16:22,190 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 214 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:22,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 49 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:16:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 04:16:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2023-11-19 04:16:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-11-19 04:16:22,193 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 15 [2023-11-19 04:16:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:22,193 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-11-19 04:16:22,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-11-19 04:16:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:16:22,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:22,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:22,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:16:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:16:22,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:16:22,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1366451336, now seen corresponding path program 1 times [2023-11-19 04:16:22,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:22,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275371625] [2023-11-19 04:16:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:22,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:16:22,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:22,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275371625] [2023-11-19 04:16:22,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275371625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:22,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:16:22,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:16:22,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921004906] [2023-11-19 04:16:22,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:22,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:16:22,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:16:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:16:22,459 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:22,540 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-11-19 04:16:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:16:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2023-11-19 04:16:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:22,542 INFO L225 Difference]: With dead ends: 59 [2023-11-19 04:16:22,542 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 04:16:22,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:16:22,543 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:22,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:16:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 04:16:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2023-11-19 04:16:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.35) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-11-19 04:16:22,545 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 16 [2023-11-19 04:16:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:22,546 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-11-19 04:16:22,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-11-19 04:16:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:16:22,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:22,547 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:22,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 04:16:22,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:16:22,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:22,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1723407384, now seen corresponding path program 1 times [2023-11-19 04:16:22,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:22,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483972376] [2023-11-19 04:16:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:22,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:23,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:23,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483972376] [2023-11-19 04:16:23,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483972376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:16:23,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025133678] [2023-11-19 04:16:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:23,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:23,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:23,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:23,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:16:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:23,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 04:16:23,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:23,251 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 04:16:23,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 04:16:23,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 04:16:23,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 04:16:23,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 04:16:23,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-19 04:16:23,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 04:16:23,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 04:16:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:23,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:16:23,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:16:23,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2023-11-19 04:16:23,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:16:23,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 30 treesize of output 33 [2023-11-19 04:16:23,889 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 04:16:23,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-19 04:16:23,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-19 04:16:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:24,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025133678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:16:24,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29768898] [2023-11-19 04:16:24,102 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 04:16:24,102 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:16:24,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:16:24,103 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:16:24,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:16:25,939 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:38,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1735#(and (<= 0 |ULTIMATE.start_main_~p~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 0)) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_92| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_81| Int) (|v_#memory_$Pointer$.base_60| (Array Int (Array Int Int))) (|v_#memory_int_56| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_59| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~i~0#1_55| Int) (|v_#memory_$Pointer$.offset_58| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_59| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_92|) 1) (= (store |v_#memory_$Pointer$.base_59| |v_ULTIMATE.start_main_~p~0#1.base_92| (store (select |v_#memory_$Pointer$.base_59| |v_ULTIMATE.start_main_~p~0#1.base_92|) |v_ULTIMATE.start_main_~p~0#1.offset_81| (select (select |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_main_~p~0#1.base_92|) |v_ULTIMATE.start_main_~p~0#1.offset_81|))) |v_#memory_$Pointer$.base_60|) (= |#memory_int| (store |v_#memory_int_56| |v_ULTIMATE.start_main_~p~0#1.base_92| (store (store (select |v_#memory_int_56| |v_ULTIMATE.start_main_~p~0#1.base_92|) |v_ULTIMATE.start_main_~p~0#1.offset_81| |v_ULTIMATE.start_main_~i~0#1_55|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_81| 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_92|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_81| 4))))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_main_~p~0#1.base_92| (store (select |v_#memory_$Pointer$.base_60| |v_ULTIMATE.start_main_~p~0#1.base_92|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_81| 4) 0))) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_81|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_59| |v_ULTIMATE.start_main_~p~0#1.base_92| (store (select |v_#memory_$Pointer$.offset_59| |v_ULTIMATE.start_main_~p~0#1.base_92|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_81| 4) 0))) (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_81| 8) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_92|)) (= (store |v_#memory_$Pointer$.offset_58| |v_ULTIMATE.start_main_~p~0#1.base_92| (store (select |v_#memory_$Pointer$.offset_58| |v_ULTIMATE.start_main_~p~0#1.base_92|) |v_ULTIMATE.start_main_~p~0#1.offset_81| (select (select |v_#memory_$Pointer$.offset_59| |v_ULTIMATE.start_main_~p~0#1.base_92|) |v_ULTIMATE.start_main_~p~0#1.offset_81|))) |v_#memory_$Pointer$.offset_59|))) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (<= (+ |ULTIMATE.start_main_~p~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (or (not (= |ULTIMATE.start_main_~p~0#1.offset| 0)) (not (= 0 |ULTIMATE.start_main_~p~0#1.base|))) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1))' at error location [2023-11-19 04:16:38,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:16:38,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:16:38,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-19 04:16:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273294158] [2023-11-19 04:16:38,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:16:38,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 04:16:38,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:38,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 04:16:38,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=979, Unknown=15, NotChecked=0, Total=1122 [2023-11-19 04:16:38,156 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:39,326 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-11-19 04:16:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 04:16:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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 18 [2023-11-19 04:16:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:39,332 INFO L225 Difference]: With dead ends: 66 [2023-11-19 04:16:39,333 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 04:16:39,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=295, Invalid=1757, Unknown=18, NotChecked=0, Total=2070 [2023-11-19 04:16:39,335 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 148 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:39,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 108 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 421 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:16:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 04:16:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2023-11-19 04:16:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.325) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-11-19 04:16:39,340 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 18 [2023-11-19 04:16:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:39,342 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-11-19 04:16:39,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:16:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-11-19 04:16:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:16:39,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:39,347 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:39,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:16:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 04:16:39,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 04:16:39,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash -251575620, now seen corresponding path program 1 times [2023-11-19 04:16:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:39,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91167455] [2023-11-19 04:16:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:16:39,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:39,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91167455] [2023-11-19 04:16:39,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91167455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:16:39,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745058643] [2023-11-19 04:16:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:39,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:39,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:39,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeaa6ab4-73b5-4e49-89f7-a63cd15f59e2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:16:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:39,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 04:16:39,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:39,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:16:40,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:16:40,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:16:40,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 15 [2023-11-19 04:16:40,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:16:40,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 15 [2023-11-19 04:16:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:40,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:16:40,383 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 04:16:40,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 62 treesize of output 55 [2023-11-19 04:16:40,391 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:16:40,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2023-11-19 04:16:40,399 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:16:40,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:16:40,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 58 [2023-11-19 04:16:40,410 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:16:40,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2023-11-19 04:16:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:16:40,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745058643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:16:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017085358] [2023-11-19 04:16:40,451 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 04:16:40,451 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:16:40,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:16:40,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:16:40,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:16:40,892 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:50,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1017085358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:50,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:16:50,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 10, 9] total 25 [2023-11-19 04:16:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519831480] [2023-11-19 04:16:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:50,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:16:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:50,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:16:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=492, Unknown=3, NotChecked=0, Total=650 [2023-11-19 04:16:50,022 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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)