./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje --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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:23:06,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:23:06,702 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 07:23:06,708 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:23:06,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:23:06,767 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:23:06,768 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:23:06,770 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:23:06,771 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:23:06,773 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:23:06,774 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:23:06,774 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:23:06,774 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:23:06,775 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:23:06,775 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:23:06,778 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:23:06,778 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:23:06,779 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:23:06,779 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:23:06,779 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:23:06,780 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:23:06,784 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:23:06,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 07:23:06,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 07:23:06,785 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:23:06,785 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:23:06,786 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:23:06,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:23:06,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:23:06,786 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 07:23:06,787 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 07:23:06,787 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 07:23:06,790 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:23:06,799 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 07:23:06,800 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:23:06,800 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 07:23:06,800 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:23:06,800 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:23:06,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:23:06,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:23:06,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:23:06,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:23:06,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:23:06,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:23:06,803 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:23:06,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:23:06,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:23:06,804 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:23:06,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:23:06,804 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_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2024-11-09 07:23:07,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:23:07,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:23:07,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:23:07,200 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:23:07,202 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:23:07,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/verifythis/prefixsum_iter.c Unable to find full path for "g++" [2024-11-09 07:23:09,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:23:09,599 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:23:09,599 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-11-09 07:23:09,607 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/data/399ba1b3c/990b8fb5bc6e4caba56799c7ad674da6/FLAG549172dee [2024-11-09 07:23:09,623 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/data/399ba1b3c/990b8fb5bc6e4caba56799c7ad674da6 [2024-11-09 07:23:09,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:23:09,627 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:23:09,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:23:09,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:23:09,638 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:23:09,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:09,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5104c4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09, skipping insertion in model container [2024-11-09 07:23:09,641 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:09,664 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:23:09,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:23:09,939 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:23:09,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:23:09,992 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:23:09,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09 WrapperNode [2024-11-09 07:23:09,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:23:09,994 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:23:09,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:23:09,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:23:10,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,041 INFO L138 Inliner]: procedures = 22, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 130 [2024-11-09 07:23:10,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:23:10,042 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:23:10,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:23:10,042 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:23:10,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,056 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,056 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,063 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,067 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,069 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,070 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,072 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:23:10,073 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:23:10,073 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:23:10,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:23:10,078 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (1/1) ... [2024-11-09 07:23:10,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:23:10,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:10,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:23:10,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:23:10,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:23:10,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 07:23:10,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 07:23:10,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:23:10,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:23:10,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 07:23:10,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:23:10,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:23:10,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:23:10,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-09 07:23:10,157 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-09 07:23:10,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:23:10,303 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:23:10,306 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:23:10,906 INFO L? ?]: Removed 120 outVars from TransFormulas that were not future-live. [2024-11-09 07:23:10,909 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:23:11,007 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:23:11,008 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 07:23:11,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:23:11 BoogieIcfgContainer [2024-11-09 07:23:11,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:23:11,014 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:23:11,016 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:23:11,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:23:11,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:23:09" (1/3) ... [2024-11-09 07:23:11,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abe676a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:23:11, skipping insertion in model container [2024-11-09 07:23:11,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:23:09" (2/3) ... [2024-11-09 07:23:11,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abe676a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:23:11, skipping insertion in model container [2024-11-09 07:23:11,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:23:11" (3/3) ... [2024-11-09 07:23:11,026 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-11-09 07:23:11,063 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:23:11,064 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-09 07:23:11,126 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:23:11,133 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@64f92e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:23:11,134 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-11-09 07:23:11,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 85 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:23:11,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:11,147 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:11,148 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:11,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1827447421, now seen corresponding path program 1 times [2024-11-09 07:23:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:11,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414555673] [2024-11-09 07:23:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:23:11,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:11,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414555673] [2024-11-09 07:23:11,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414555673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:23:11,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:23:11,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:23:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479899881] [2024-11-09 07:23:11,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:23:11,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:23:11,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:23:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:23:11,953 INFO L87 Difference]: Start difference. First operand has 92 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 85 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:23:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:12,171 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-11-09 07:23:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:23:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2024-11-09 07:23:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:12,184 INFO L225 Difference]: With dead ends: 90 [2024-11-09 07:23:12,184 INFO L226 Difference]: Without dead ends: 89 [2024-11-09 07:23:12,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:23:12,192 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 72 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:12,194 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 139 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:23:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-09 07:23:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-09 07:23:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 82 states have internal predecessors, (96), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2024-11-09 07:23:12,253 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 22 [2024-11-09 07:23:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:12,255 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2024-11-09 07:23:12,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:23:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2024-11-09 07:23:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:23:12,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:12,259 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:12,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:23:12,260 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:12,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1827447422, now seen corresponding path program 1 times [2024-11-09 07:23:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:12,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799789034] [2024-11-09 07:23:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:12,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:13,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799789034] [2024-11-09 07:23:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799789034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:23:13,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:23:13,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 07:23:13,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274319932] [2024-11-09 07:23:13,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:23:13,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:23:13,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:23:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:23:13,389 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:14,146 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-11-09 07:23:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:23:14,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-11-09 07:23:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:14,150 INFO L225 Difference]: With dead ends: 97 [2024-11-09 07:23:14,150 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 07:23:14,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-09 07:23:14,152 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 296 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:14,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 368 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:23:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 07:23:14,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2024-11-09 07:23:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 85 states have internal predecessors, (101), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2024-11-09 07:23:14,164 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 22 [2024-11-09 07:23:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:14,164 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2024-11-09 07:23:14,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2024-11-09 07:23:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 07:23:14,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:14,166 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:14,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:23:14,167 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:14,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:14,168 INFO L85 PathProgramCache]: Analyzing trace with hash 816295211, now seen corresponding path program 1 times [2024-11-09 07:23:14,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:14,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30051262] [2024-11-09 07:23:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:14,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:23:14,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30051262] [2024-11-09 07:23:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30051262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:23:14,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:23:14,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:23:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024520781] [2024-11-09 07:23:14,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:23:14,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:23:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:23:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:23:14,248 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:23:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:14,359 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2024-11-09 07:23:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:23:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2024-11-09 07:23:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:14,361 INFO L225 Difference]: With dead ends: 91 [2024-11-09 07:23:14,362 INFO L226 Difference]: Without dead ends: 91 [2024-11-09 07:23:14,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:23:14,364 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 71 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:14,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 146 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:23:14,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-09 07:23:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-09 07:23:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.8518518518518519) internal successors, (100), 84 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2024-11-09 07:23:14,373 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 23 [2024-11-09 07:23:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:14,373 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2024-11-09 07:23:14,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:23:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2024-11-09 07:23:14,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 07:23:14,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:14,375 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:14,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 07:23:14,375 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:14,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 816295212, now seen corresponding path program 1 times [2024-11-09 07:23:14,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:14,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182280133] [2024-11-09 07:23:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:14,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:23:14,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:14,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182280133] [2024-11-09 07:23:14,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182280133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:23:14,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:23:14,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:23:14,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571290028] [2024-11-09 07:23:14,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:23:14,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:23:14,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:23:14,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:23:14,848 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:23:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:15,200 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2024-11-09 07:23:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:23:15,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2024-11-09 07:23:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:15,203 INFO L225 Difference]: With dead ends: 92 [2024-11-09 07:23:15,206 INFO L226 Difference]: Without dead ends: 92 [2024-11-09 07:23:15,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:23:15,208 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:15,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:23:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-09 07:23:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-09 07:23:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 85 states have internal predecessors, (101), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2024-11-09 07:23:15,225 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 23 [2024-11-09 07:23:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:15,226 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2024-11-09 07:23:15,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:23:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2024-11-09 07:23:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 07:23:15,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:15,229 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:15,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:23:15,229 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:15,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash -451347632, now seen corresponding path program 1 times [2024-11-09 07:23:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302096028] [2024-11-09 07:23:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:15,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:23:15,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302096028] [2024-11-09 07:23:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302096028] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:23:15,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:23:15,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:23:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975894766] [2024-11-09 07:23:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:23:15,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:23:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:23:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:23:15,449 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:23:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:15,616 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2024-11-09 07:23:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:23:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2024-11-09 07:23:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:15,618 INFO L225 Difference]: With dead ends: 86 [2024-11-09 07:23:15,618 INFO L226 Difference]: Without dead ends: 86 [2024-11-09 07:23:15,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:23:15,619 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 79 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:15,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 171 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:23:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-09 07:23:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-09 07:23:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 79 states have internal predecessors, (95), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2024-11-09 07:23:15,627 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 24 [2024-11-09 07:23:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:15,628 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2024-11-09 07:23:15,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:23:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2024-11-09 07:23:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 07:23:15,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:15,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:15,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:23:15,631 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:15,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash -451347631, now seen corresponding path program 1 times [2024-11-09 07:23:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:15,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510470023] [2024-11-09 07:23:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:15,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:15,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510470023] [2024-11-09 07:23:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510470023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:23:15,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:23:15,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 07:23:15,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833470073] [2024-11-09 07:23:15,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:23:15,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:23:15,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:15,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:23:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:23:15,937 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:23:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:16,231 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2024-11-09 07:23:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:23:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2024-11-09 07:23:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:16,239 INFO L225 Difference]: With dead ends: 139 [2024-11-09 07:23:16,239 INFO L226 Difference]: Without dead ends: 139 [2024-11-09 07:23:16,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 07:23:16,247 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 174 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:16,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 432 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:23:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-09 07:23:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 97. [2024-11-09 07:23:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 87 states have internal predecessors, (105), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:23:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2024-11-09 07:23:16,256 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 24 [2024-11-09 07:23:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:16,257 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2024-11-09 07:23:16,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:23:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2024-11-09 07:23:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 07:23:16,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:16,259 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:16,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 07:23:16,259 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:16,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash 945756524, now seen corresponding path program 1 times [2024-11-09 07:23:16,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563900729] [2024-11-09 07:23:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:16,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:16,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563900729] [2024-11-09 07:23:16,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563900729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:16,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821571191] [2024-11-09 07:23:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:16,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:16,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:16,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:23:16,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:23:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:16,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 07:23:16,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:23:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:16,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:23:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:17,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821571191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:23:17,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522314856] [2024-11-09 07:23:17,233 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-09 07:23:17,233 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:23:17,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:23:17,244 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:23:17,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:23:18,143 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:23:18,178 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:23:18,202 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:23:21,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1463#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (exists ((|v_#length_52| (Array Int Int))) (= |#length| (store (store |v_#length_52| |ULTIMATE.start_main_~a~0#1.base| 0) |ULTIMATE.start_main_~a0~0#1.base| 0))) (exists ((|v_ULTIMATE.start_is_pow2_~x#1_19| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_19| 4294967296) 1)) (not (= |ULTIMATE.start_main_~a~0#1.base| 0)) (not (= |ULTIMATE.start_main_~a0~0#1.base| 0)) (<= (+ |ULTIMATE.start_main_~a0~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 0) (exists ((|v_#valid_63| (Array Int Int))) (and (= (select (store |v_#valid_63| |ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~a0~0#1.base|) 0) (= (select |v_#valid_63| |ULTIMATE.start_main_~a~0#1.base|) 0) (= (store (store |v_#valid_63| |ULTIMATE.start_main_~a~0#1.base| 1) |ULTIMATE.start_main_~a0~0#1.base| 1) |#valid|))) (exists ((|v_#memory_int_66| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_66| |ULTIMATE.start_main_~a0~0#1.base| ((as const (Array Int Int)) 0)))) (<= (+ |ULTIMATE.start_main_~a~0#1.base| 1) |#StackHeapBarrier|) (= 1 |ULTIMATE.start_downsweep_~space#1|))' at error location [2024-11-09 07:23:21,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:23:21,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:23:21,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2024-11-09 07:23:21,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532366066] [2024-11-09 07:23:21,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:23:21,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 07:23:21,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 07:23:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1286, Unknown=1, NotChecked=0, Total=1482 [2024-11-09 07:23:21,828 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 07:23:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:22,371 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2024-11-09 07:23:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:23:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 26 [2024-11-09 07:23:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:22,373 INFO L225 Difference]: With dead ends: 149 [2024-11-09 07:23:22,374 INFO L226 Difference]: Without dead ends: 149 [2024-11-09 07:23:22,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=246, Invalid=1559, Unknown=1, NotChecked=0, Total=1806 [2024-11-09 07:23:22,375 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 288 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:22,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 787 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:23:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-09 07:23:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2024-11-09 07:23:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 89 states have internal predecessors, (103), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:23:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2024-11-09 07:23:22,385 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 26 [2024-11-09 07:23:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:22,385 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2024-11-09 07:23:22,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 07:23:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2024-11-09 07:23:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 07:23:22,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:22,387 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:22,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 07:23:22,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:22,590 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:22,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash 150626260, now seen corresponding path program 1 times [2024-11-09 07:23:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:22,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134412492] [2024-11-09 07:23:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:22,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:22,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134412492] [2024-11-09 07:23:22,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134412492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:22,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415284078] [2024-11-09 07:23:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:22,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:22,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:22,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:23:22,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:23:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:22,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 07:23:22,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:23:23,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:23:23,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:23:23,185 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:23:23,185 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 [2024-11-09 07:23:23,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 07:23:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:23:23,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:23:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415284078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:24,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130220354] [2024-11-09 07:23:24,384 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 07:23:24,386 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:23:24,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:23:24,387 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:23:24,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:23:27,109 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:23:27,182 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:23:27,215 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:23:35,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [130220354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:23:35,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:23:35,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [9, 10] total 35 [2024-11-09 07:23:35,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642528564] [2024-11-09 07:23:35,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:23:35,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 07:23:35,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 07:23:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1322, Unknown=2, NotChecked=0, Total=1560 [2024-11-09 07:23:35,398 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:39,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:23:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:40,582 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2024-11-09 07:23:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 07:23:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-11-09 07:23:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:40,584 INFO L225 Difference]: With dead ends: 120 [2024-11-09 07:23:40,584 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 07:23:40,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=249, Invalid=1389, Unknown=2, NotChecked=0, Total=1640 [2024-11-09 07:23:40,586 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 15 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:40,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 570 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 948 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2024-11-09 07:23:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 07:23:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2024-11-09 07:23:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 101 states have internal predecessors, (117), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:23:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2024-11-09 07:23:40,593 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 26 [2024-11-09 07:23:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:40,593 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2024-11-09 07:23:40,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2024-11-09 07:23:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 07:23:40,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:40,595 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:40,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:23:40,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:40,799 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:40,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1557044433, now seen corresponding path program 1 times [2024-11-09 07:23:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:40,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375029327] [2024-11-09 07:23:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:41,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:41,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375029327] [2024-11-09 07:23:41,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375029327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:41,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683135532] [2024-11-09 07:23:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:41,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:41,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:41,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:23:41,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:23:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:41,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 07:23:41,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:23:41,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:23:41,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:23:41,957 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:23:41,957 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 11 treesize of output 11 [2024-11-09 07:23:41,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 07:23:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:23:42,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:23:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683135532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1126807981] [2024-11-09 07:23:42,648 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:23:42,648 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:23:42,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:23:42,649 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:23:42,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:23:43,154 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:23:43,169 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:23:43,180 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:23:45,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2281#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823))' at error location [2024-11-09 07:23:45,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:23:45,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:23:45,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2024-11-09 07:23:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612963208] [2024-11-09 07:23:45,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:23:45,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 07:23:45,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 07:23:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2007, Unknown=1, NotChecked=0, Total=2256 [2024-11-09 07:23:45,560 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 22 states have internal predecessors, (37), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 07:23:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:47,089 INFO L93 Difference]: Finished difference Result 202 states and 242 transitions. [2024-11-09 07:23:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:23:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 22 states have internal predecessors, (37), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 28 [2024-11-09 07:23:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:47,091 INFO L225 Difference]: With dead ends: 202 [2024-11-09 07:23:47,091 INFO L226 Difference]: Without dead ends: 202 [2024-11-09 07:23:47,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=463, Invalid=3442, Unknown=1, NotChecked=0, Total=3906 [2024-11-09 07:23:47,094 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 628 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:47,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 514 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 07:23:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-09 07:23:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 118. [2024-11-09 07:23:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 79 states have (on average 1.5063291139240507) internal successors, (119), 103 states have internal predecessors, (119), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:23:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2024-11-09 07:23:47,102 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 28 [2024-11-09 07:23:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:47,102 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2024-11-09 07:23:47,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 22 states have internal predecessors, (37), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 07:23:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2024-11-09 07:23:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 07:23:47,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:47,104 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:47,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:23:47,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:47,308 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:47,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1263748313, now seen corresponding path program 1 times [2024-11-09 07:23:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:47,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298570685] [2024-11-09 07:23:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:47,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:23:47,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:47,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298570685] [2024-11-09 07:23:47,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298570685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:47,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337460892] [2024-11-09 07:23:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:47,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:47,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:47,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:23:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:23:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:47,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 07:23:47,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:23:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:23:47,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:23:47,990 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 28 treesize of output 24 [2024-11-09 07:23:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:23:48,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337460892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:23:48,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455140857] [2024-11-09 07:23:48,085 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:23:48,085 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:23:48,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:23:48,086 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:23:48,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:23:49,647 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:23:49,685 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:23:49,697 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:23:56,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2837#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (or (= |ULTIMATE.start_main_~n~0#1| 0) (< (select |#length| |ULTIMATE.start_main_~a~0#1.base|) (* |ULTIMATE.start_main_~n~0#1| 4))) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (= 1 |ULTIMATE.start_downsweep_~space#1|))' at error location [2024-11-09 07:23:56,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:23:56,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:23:56,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-09 07:23:56,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909507791] [2024-11-09 07:23:56,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:23:56,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 07:23:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 07:23:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1904, Unknown=1, NotChecked=0, Total=2162 [2024-11-09 07:23:56,794 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:23:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:57,271 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2024-11-09 07:23:57,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:23:57,274 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2024-11-09 07:23:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:57,275 INFO L225 Difference]: With dead ends: 120 [2024-11-09 07:23:57,275 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 07:23:57,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=334, Invalid=2317, Unknown=1, NotChecked=0, Total=2652 [2024-11-09 07:23:57,276 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 208 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:57,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 553 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:23:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 07:23:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2024-11-09 07:23:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.481012658227848) internal successors, (117), 101 states have internal predecessors, (117), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:23:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2024-11-09 07:23:57,283 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 28 [2024-11-09 07:23:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:57,283 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2024-11-09 07:23:57,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:23:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2024-11-09 07:23:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 07:23:57,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:57,285 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:57,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:23:57,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 07:23:57,485 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:23:57,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1023737189, now seen corresponding path program 1 times [2024-11-09 07:23:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:57,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28975304] [2024-11-09 07:23:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:23:57,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:57,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28975304] [2024-11-09 07:23:57,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28975304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:57,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577818537] [2024-11-09 07:23:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:57,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:57,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:57,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:23:57,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:23:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:57,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:23:57,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:23:57,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 07:23:58,089 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-09 07:23:58,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 07:23:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:23:58,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:23:58,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577818537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953783791] [2024-11-09 07:23:58,883 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:23:58,883 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:23:58,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:23:58,883 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:23:58,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:23:59,362 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:23:59,375 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:23:59,385 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:24:01,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3251#(and (exists ((|v_ULTIMATE.start_main_~a0~0#1.base_23| Int) (|v_ULTIMATE.start_main_~a0~0#1.offset_21| Int) (|v_ULTIMATE.start_main_~i~1#1_54| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |v_ULTIMATE.start_main_~a0~0#1.offset_21| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_54| 4)) |ULTIMATE.start_main_#t~mem17#1|) (<= (select |#length| |v_ULTIMATE.start_main_~a0~0#1.base_23|) (+ (* |v_ULTIMATE.start_main_~i~1#1_54| 4) 3)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= (+ (* |v_ULTIMATE.start_main_~i~1#1_54| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 0 |v_ULTIMATE.start_main_~i~1#1_54|))) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1))' at error location [2024-11-09 07:24:01,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:24:01,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:24:01,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-11-09 07:24:01,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919516653] [2024-11-09 07:24:01,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:24:01,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 07:24:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:24:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 07:24:01,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1329, Unknown=1, NotChecked=0, Total=1482 [2024-11-09 07:24:01,255 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:24:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:01,801 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2024-11-09 07:24:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:24:01,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2024-11-09 07:24:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:01,805 INFO L225 Difference]: With dead ends: 119 [2024-11-09 07:24:01,805 INFO L226 Difference]: Without dead ends: 119 [2024-11-09 07:24:01,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=163, Invalid=1396, Unknown=1, NotChecked=0, Total=1560 [2024-11-09 07:24:01,806 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 82 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:01,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 384 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:24:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-09 07:24:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2024-11-09 07:24:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 79 states have (on average 1.4683544303797469) internal successors, (116), 100 states have internal predecessors, (116), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:24:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2024-11-09 07:24:01,812 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 29 [2024-11-09 07:24:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:01,812 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2024-11-09 07:24:01,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:24:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2024-11-09 07:24:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 07:24:01,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:01,814 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:01,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 07:24:02,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:24:02,018 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:24:02,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:02,018 INFO L85 PathProgramCache]: Analyzing trace with hash 981297641, now seen corresponding path program 1 times [2024-11-09 07:24:02,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:02,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796520771] [2024-11-09 07:24:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:02,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:02,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796520771] [2024-11-09 07:24:02,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796520771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:24:02,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:24:02,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:24:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303269203] [2024-11-09 07:24:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:24:02,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:24:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:24:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:24:02,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:24:02,081 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:24:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:02,168 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2024-11-09 07:24:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:24:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-11-09 07:24:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:02,169 INFO L225 Difference]: With dead ends: 115 [2024-11-09 07:24:02,169 INFO L226 Difference]: Without dead ends: 115 [2024-11-09 07:24:02,170 INFO L431 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 [2024-11-09 07:24:02,170 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 65 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:02,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 133 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:24:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-09 07:24:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2024-11-09 07:24:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 79 states have (on average 1.4303797468354431) internal successors, (113), 97 states have internal predecessors, (113), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:24:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2024-11-09 07:24:02,176 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2024-11-09 07:24:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:02,176 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2024-11-09 07:24:02,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:24:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2024-11-09 07:24:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 07:24:02,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:02,178 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:02,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 07:24:02,178 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:24:02,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash 981297642, now seen corresponding path program 1 times [2024-11-09 07:24:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:02,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223308197] [2024-11-09 07:24:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:02,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:02,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223308197] [2024-11-09 07:24:02,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223308197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:24:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443731742] [2024-11-09 07:24:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:24:02,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:24:02,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:24:02,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:24:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:02,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:24:02,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:24:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:02,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:24:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:02,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443731742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:24:02,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599323409] [2024-11-09 07:24:02,503 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 07:24:02,503 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:24:02,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:24:02,504 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:24:02,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:24:04,115 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:24:04,180 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:24:04,200 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:24:10,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1599323409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:24:10,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:24:10,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [7, 6, 6] total 30 [2024-11-09 07:24:10,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215507505] [2024-11-09 07:24:10,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:24:10,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 07:24:10,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:24:10,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 07:24:10,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=763, Unknown=2, NotChecked=0, Total=870 [2024-11-09 07:24:10,690 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:24:14,594 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] [2024-11-09 07:24:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:15,554 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2024-11-09 07:24:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 07:24:15,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2024-11-09 07:24:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:15,555 INFO L225 Difference]: With dead ends: 132 [2024-11-09 07:24:15,555 INFO L226 Difference]: Without dead ends: 132 [2024-11-09 07:24:15,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=119, Invalid=871, Unknown=2, NotChecked=0, Total=992 [2024-11-09 07:24:15,556 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 35 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:15,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 776 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1116 Invalid, 3 Unknown, 0 Unchecked, 4.6s Time] [2024-11-09 07:24:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-09 07:24:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2024-11-09 07:24:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 99 states have internal predecessors, (115), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:24:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 135 transitions. [2024-11-09 07:24:15,561 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 135 transitions. Word has length 30 [2024-11-09 07:24:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:15,562 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 135 transitions. [2024-11-09 07:24:15,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:24:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 135 transitions. [2024-11-09 07:24:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 07:24:15,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:15,563 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:15,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:24:15,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 07:24:15,768 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:24:15,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash 412966917, now seen corresponding path program 2 times [2024-11-09 07:24:15,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:15,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229092433] [2024-11-09 07:24:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:24:16,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229092433] [2024-11-09 07:24:16,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229092433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:24:16,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834316281] [2024-11-09 07:24:16,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:24:16,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:24:16,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:24:16,097 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:24:16,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:24:16,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 07:24:16,192 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:24:16,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 07:24:16,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:24:16,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:24:16,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:24:16,472 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-11-09 07:24:16,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2024-11-09 07:24:16,501 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:24:16,502 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 [2024-11-09 07:24:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:24:17,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:24:17,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834316281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:24:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043216824] [2024-11-09 07:24:17,647 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:24:17,647 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:24:17,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:24:17,647 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:24:17,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:24:18,034 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:24:18,047 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:24:18,059 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:24:20,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4366#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823))' at error location [2024-11-09 07:24:20,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:24:20,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:24:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2024-11-09 07:24:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436003698] [2024-11-09 07:24:20,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:24:20,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:24:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:24:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:24:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1939, Unknown=1, NotChecked=0, Total=2162 [2024-11-09 07:24:20,510 INFO L87 Difference]: Start difference. First operand 114 states and 135 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:24:23,358 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] [2024-11-09 07:24:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:24,854 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2024-11-09 07:24:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:24:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 32 [2024-11-09 07:24:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:24,855 INFO L225 Difference]: With dead ends: 170 [2024-11-09 07:24:24,855 INFO L226 Difference]: Without dead ends: 170 [2024-11-09 07:24:24,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=543, Invalid=4012, Unknown=1, NotChecked=0, Total=4556 [2024-11-09 07:24:24,857 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 441 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:24,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 374 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 594 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 07:24:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-09 07:24:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 138. [2024-11-09 07:24:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 118 states have internal predecessors, (136), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:24:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2024-11-09 07:24:24,864 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 32 [2024-11-09 07:24:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:24,864 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2024-11-09 07:24:24,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:24:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2024-11-09 07:24:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:24:24,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:24,865 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:24,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:24:25,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 07:24:25,070 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:24:25,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2017845080, now seen corresponding path program 1 times [2024-11-09 07:24:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:25,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208089314] [2024-11-09 07:24:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:25,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:25,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:25,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208089314] [2024-11-09 07:24:25,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208089314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:24:25,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:24:25,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:24:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038559126] [2024-11-09 07:24:25,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:24:25,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:24:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:24:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:24:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:24:25,162 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:24:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:25,266 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2024-11-09 07:24:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:24:25,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-09 07:24:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:25,267 INFO L225 Difference]: With dead ends: 137 [2024-11-09 07:24:25,268 INFO L226 Difference]: Without dead ends: 137 [2024-11-09 07:24:25,268 INFO L431 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 [2024-11-09 07:24:25,268 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 61 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:25,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 136 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:24:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-09 07:24:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-09 07:24:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 117 states have internal predecessors, (135), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:24:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2024-11-09 07:24:25,277 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 33 [2024-11-09 07:24:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:25,278 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2024-11-09 07:24:25,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:24:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2024-11-09 07:24:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:24:25,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:25,280 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:25,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 07:24:25,280 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:24:25,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2017845079, now seen corresponding path program 1 times [2024-11-09 07:24:25,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:25,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130534136] [2024-11-09 07:24:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:25,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:24:25,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:25,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130534136] [2024-11-09 07:24:25,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130534136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:24:25,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:24:25,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:24:25,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051263259] [2024-11-09 07:24:25,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:24:25,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:24:25,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:24:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:24:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:24:25,475 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:24:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:25,693 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2024-11-09 07:24:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:24:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-11-09 07:24:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:25,694 INFO L225 Difference]: With dead ends: 146 [2024-11-09 07:24:25,694 INFO L226 Difference]: Without dead ends: 146 [2024-11-09 07:24:25,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:24:25,695 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 146 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:25,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 205 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:24:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-09 07:24:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2024-11-09 07:24:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 120 states have internal predecessors, (140), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:24:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2024-11-09 07:24:25,705 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 33 [2024-11-09 07:24:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:25,705 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2024-11-09 07:24:25,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:24:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2024-11-09 07:24:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:24:25,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:25,708 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:25,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 07:24:25,708 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:24:25,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2054016317, now seen corresponding path program 1 times [2024-11-09 07:24:25,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:25,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925775849] [2024-11-09 07:24:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:25,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:25,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925775849] [2024-11-09 07:24:25,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925775849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:24:25,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072665715] [2024-11-09 07:24:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:25,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:24:25,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:24:25,897 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:24:25,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:24:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:25,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:24:25,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:24:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:26,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:24:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:26,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072665715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:24:26,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1389686475] [2024-11-09 07:24:26,175 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 07:24:26,176 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:24:26,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:24:26,177 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:24:26,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:24:27,788 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:24:27,828 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:24:27,849 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:24:35,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1389686475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:24:35,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:24:35,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 8, 8] total 35 [2024-11-09 07:24:35,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619044726] [2024-11-09 07:24:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:24:35,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 07:24:35,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:24:35,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 07:24:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1065, Unknown=1, NotChecked=0, Total=1190 [2024-11-09 07:24:35,536 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:24:39,170 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] [2024-11-09 07:24:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:39,864 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2024-11-09 07:24:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 07:24:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2024-11-09 07:24:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:39,866 INFO L225 Difference]: With dead ends: 144 [2024-11-09 07:24:39,866 INFO L226 Difference]: Without dead ends: 144 [2024-11-09 07:24:39,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=138, Invalid=1193, Unknown=1, NotChecked=0, Total=1332 [2024-11-09 07:24:39,867 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 14 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:39,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 492 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 836 Invalid, 3 Unknown, 0 Unchecked, 4.1s Time] [2024-11-09 07:24:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-09 07:24:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2024-11-09 07:24:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 107 states have (on average 1.3364485981308412) internal successors, (143), 123 states have internal predecessors, (143), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:24:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 169 transitions. [2024-11-09 07:24:39,873 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 169 transitions. Word has length 33 [2024-11-09 07:24:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:39,873 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 169 transitions. [2024-11-09 07:24:39,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:24:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 169 transitions. [2024-11-09 07:24:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 07:24:39,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:39,874 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:39,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:24:40,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 07:24:40,079 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:24:40,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1872109508, now seen corresponding path program 1 times [2024-11-09 07:24:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:40,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652555490] [2024-11-09 07:24:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:40,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:40,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:40,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652555490] [2024-11-09 07:24:40,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652555490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:24:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118675661] [2024-11-09 07:24:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:40,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:24:40,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:24:40,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:24:40,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:24:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:40,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:24:40,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:24:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:40,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:24:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118675661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:24:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348901857] [2024-11-09 07:24:40,488 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 07:24:40,488 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:24:40,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:24:40,488 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:24:40,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:24:42,343 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:24:42,385 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:24:42,401 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:24:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [348901857] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:24:50,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:24:50,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [7, 5, 5] total 35 [2024-11-09 07:24:50,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731910588] [2024-11-09 07:24:50,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:24:50,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 07:24:50,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:24:50,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 07:24:50,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1066, Unknown=1, NotChecked=0, Total=1190 [2024-11-09 07:24:50,869 INFO L87 Difference]: Start difference. First operand 143 states and 169 transitions. Second operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:24:55,176 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] [2024-11-09 07:24:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:55,912 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2024-11-09 07:24:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:24:55,912 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2024-11-09 07:24:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:55,913 INFO L225 Difference]: With dead ends: 152 [2024-11-09 07:24:55,913 INFO L226 Difference]: Without dead ends: 152 [2024-11-09 07:24:55,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=137, Invalid=1194, Unknown=1, NotChecked=0, Total=1332 [2024-11-09 07:24:55,914 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 19 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:55,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 718 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1273 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2024-11-09 07:24:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-09 07:24:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2024-11-09 07:24:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.3272727272727274) internal successors, (146), 126 states have internal predecessors, (146), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:24:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 172 transitions. [2024-11-09 07:24:55,919 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 172 transitions. Word has length 34 [2024-11-09 07:24:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:55,919 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 172 transitions. [2024-11-09 07:24:55,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:24:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 172 transitions. [2024-11-09 07:24:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 07:24:55,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:55,920 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:55,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 07:24:56,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 07:24:56,121 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:24:56,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:56,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2118808058, now seen corresponding path program 1 times [2024-11-09 07:24:56,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:56,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310351562] [2024-11-09 07:24:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:56,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:24:56,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:56,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310351562] [2024-11-09 07:24:56,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310351562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:24:56,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238358876] [2024-11-09 07:24:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:56,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:24:56,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:24:56,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:24:56,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:24:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:56,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 07:24:56,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:24:56,958 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 [2024-11-09 07:24:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:57,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:24:57,173 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 37 treesize of output 33 [2024-11-09 07:24:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:24:57,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238358876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:24:57,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666703133] [2024-11-09 07:24:57,352 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 07:24:57,353 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:24:57,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:24:57,353 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:24:57,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:24:58,641 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:24:58,677 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:24:58,689 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:25:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [666703133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:25:07,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:25:07,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [12, 10, 10] total 49 [2024-11-09 07:25:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174550383] [2024-11-09 07:25:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:25:07,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 07:25:07,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 07:25:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2154, Unknown=1, NotChecked=0, Total=2352 [2024-11-09 07:25:07,844 INFO L87 Difference]: Start difference. First operand 146 states and 172 transitions. Second operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:25:11,926 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] [2024-11-09 07:25:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:25:13,125 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2024-11-09 07:25:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 07:25:13,126 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-11-09 07:25:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:25:13,127 INFO L225 Difference]: With dead ends: 150 [2024-11-09 07:25:13,127 INFO L226 Difference]: Without dead ends: 150 [2024-11-09 07:25:13,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=217, Invalid=2332, Unknown=1, NotChecked=0, Total=2550 [2024-11-09 07:25:13,129 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 13 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:25:13,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 679 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1299 Invalid, 3 Unknown, 0 Unchecked, 5.1s Time] [2024-11-09 07:25:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-09 07:25:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2024-11-09 07:25:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 128 states have internal predecessors, (148), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:25:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 174 transitions. [2024-11-09 07:25:13,133 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 174 transitions. Word has length 35 [2024-11-09 07:25:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:25:13,134 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 174 transitions. [2024-11-09 07:25:13,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:25:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 174 transitions. [2024-11-09 07:25:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 07:25:13,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:13,135 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:25:13,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 07:25:13,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:25:13,340 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:25:13,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1017976421, now seen corresponding path program 1 times [2024-11-09 07:25:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:13,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42842147] [2024-11-09 07:25:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:13,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:25:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42842147] [2024-11-09 07:25:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42842147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:25:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95440840] [2024-11-09 07:25:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:13,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:25:13,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:25:13,650 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:25:13,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:25:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:13,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 07:25:13,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:25:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:14,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:25:14,137 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 22 treesize of output 18 [2024-11-09 07:25:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95440840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:25:14,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557778445] [2024-11-09 07:25:14,250 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 07:25:14,250 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:25:14,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:25:14,251 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:25:14,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:25:14,622 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:25:14,631 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:25:14,638 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:25:17,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7156#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (select |#length| |ULTIMATE.start_main_~a~0#1.base|) 3) (= |ULTIMATE.start_upsweep_~right~0#1| 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:25:17,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:25:17,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:25:17,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-09 07:25:17,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440066178] [2024-11-09 07:25:17,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:25:17,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:25:17,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:25:17,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1866, Unknown=1, NotChecked=0, Total=2070 [2024-11-09 07:25:17,218 INFO L87 Difference]: Start difference. First operand 148 states and 174 transitions. Second operand has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:25:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:25:18,074 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2024-11-09 07:25:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 07:25:18,075 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2024-11-09 07:25:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:25:18,076 INFO L225 Difference]: With dead ends: 199 [2024-11-09 07:25:18,076 INFO L226 Difference]: Without dead ends: 199 [2024-11-09 07:25:18,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=332, Invalid=2859, Unknown=1, NotChecked=0, Total=3192 [2024-11-09 07:25:18,078 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 361 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:25:18,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 452 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:25:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-11-09 07:25:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 164. [2024-11-09 07:25:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 128 states have (on average 1.3828125) internal successors, (177), 144 states have internal predecessors, (177), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:25:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2024-11-09 07:25:18,088 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 36 [2024-11-09 07:25:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:25:18,088 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2024-11-09 07:25:18,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:25:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2024-11-09 07:25:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 07:25:18,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:18,089 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:25:18,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 07:25:18,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:25:18,290 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:25:18,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1258534218, now seen corresponding path program 1 times [2024-11-09 07:25:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:18,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166287114] [2024-11-09 07:25:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:18,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:25:18,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166287114] [2024-11-09 07:25:18,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166287114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:25:18,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:25:18,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:25:18,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496221157] [2024-11-09 07:25:18,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:25:18,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:25:18,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:25:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:25:18,388 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:25:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:25:18,517 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2024-11-09 07:25:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:25:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-11-09 07:25:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:25:18,519 INFO L225 Difference]: With dead ends: 163 [2024-11-09 07:25:18,519 INFO L226 Difference]: Without dead ends: 163 [2024-11-09 07:25:18,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:25:18,520 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 55 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:25:18,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 184 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:25:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-09 07:25:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-11-09 07:25:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.375) internal successors, (176), 143 states have internal predecessors, (176), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:25:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 202 transitions. [2024-11-09 07:25:18,527 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 202 transitions. Word has length 36 [2024-11-09 07:25:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:25:18,527 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 202 transitions. [2024-11-09 07:25:18,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:25:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 202 transitions. [2024-11-09 07:25:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 07:25:18,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:18,528 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:25:18,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-09 07:25:18,529 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:25:18,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1258534217, now seen corresponding path program 1 times [2024-11-09 07:25:18,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:18,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174650004] [2024-11-09 07:25:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:25:18,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:25:18,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174650004] [2024-11-09 07:25:18,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174650004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:25:18,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456753882] [2024-11-09 07:25:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:18,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:25:18,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:25:18,834 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:25:18,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:25:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:18,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 07:25:18,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:25:18,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:25:18,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:25:19,078 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 07:25:19,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-09 07:25:19,112 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:25:19,112 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 [2024-11-09 07:25:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:25:20,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:25:20,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456753882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:25:20,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742563137] [2024-11-09 07:25:20,866 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2024-11-09 07:25:20,866 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:25:20,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:25:20,867 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:25:20,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:25:22,501 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:25:22,561 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:25:22,582 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:25:50,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8095#(and (= |ULTIMATE.start_check_~n#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_check_~sum~0#1| 0) (<= (select |#length| |ULTIMATE.start_main_~a0~0#1.base|) 3) (= |ULTIMATE.start_check_~a#1.offset| 0) (<= 4 (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (exists ((|v_#memory_int_230| (Array Int (Array Int Int)))) (= (store |v_#memory_int_230| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_230| |ULTIMATE.start_main_~a~0#1.base|) 0 0)) |#memory_int|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1))' at error location [2024-11-09 07:25:50,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:25:50,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:25:50,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10] total 14 [2024-11-09 07:25:50,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757583185] [2024-11-09 07:25:50,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:25:50,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:25:50,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:50,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:25:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2113, Unknown=8, NotChecked=0, Total=2352 [2024-11-09 07:25:50,684 INFO L87 Difference]: Start difference. First operand 163 states and 202 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 07:25:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:25:53,157 INFO L93 Difference]: Finished difference Result 168 states and 207 transitions. [2024-11-09 07:25:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:25:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2024-11-09 07:25:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:25:53,159 INFO L225 Difference]: With dead ends: 168 [2024-11-09 07:25:53,159 INFO L226 Difference]: Without dead ends: 168 [2024-11-09 07:25:53,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=418, Invalid=3356, Unknown=8, NotChecked=0, Total=3782 [2024-11-09 07:25:53,161 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 285 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:25:53,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 301 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 07:25:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-09 07:25:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2024-11-09 07:25:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.3740458015267176) internal successors, (180), 146 states have internal predecessors, (180), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:25:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2024-11-09 07:25:53,166 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 36 [2024-11-09 07:25:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:25:53,166 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2024-11-09 07:25:53,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 07:25:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2024-11-09 07:25:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 07:25:53,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:53,167 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:25:53,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 07:25:53,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 07:25:53,368 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:25:53,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1492497972, now seen corresponding path program 1 times [2024-11-09 07:25:53,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:53,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82570329] [2024-11-09 07:25:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:53,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:53,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:25:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82570329] [2024-11-09 07:25:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82570329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:25:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561634034] [2024-11-09 07:25:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:53,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:25:53,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:25:53,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:25:53,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:25:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:53,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 07:25:53,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:25:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:54,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:25:54,206 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 24 treesize of output 20 [2024-11-09 07:25:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:54,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561634034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:25:54,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348330398] [2024-11-09 07:25:54,378 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 07:25:54,378 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:25:54,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:25:54,379 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:25:54,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:25:54,768 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:25:54,777 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:25:54,786 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:25:58,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8725#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= 4 (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) |ULTIMATE.start_upsweep_#t~mem5#1|) (<= (select |#length| |ULTIMATE.start_main_~a~0#1.base|) 7) (= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:25:58,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:25:58,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:25:58,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-09 07:25:58,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631776528] [2024-11-09 07:25:58,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:25:58,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:25:58,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:25:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2398, Unknown=1, NotChecked=0, Total=2652 [2024-11-09 07:25:58,088 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:25:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:25:58,886 INFO L93 Difference]: Finished difference Result 194 states and 235 transitions. [2024-11-09 07:25:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:25:58,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 37 [2024-11-09 07:25:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:25:58,887 INFO L225 Difference]: With dead ends: 194 [2024-11-09 07:25:58,887 INFO L226 Difference]: Without dead ends: 194 [2024-11-09 07:25:58,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=336, Invalid=2969, Unknown=1, NotChecked=0, Total=3306 [2024-11-09 07:25:58,889 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 255 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:25:58,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 485 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:25:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-09 07:25:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 166. [2024-11-09 07:25:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 132 states have (on average 1.356060606060606) internal successors, (179), 146 states have internal predecessors, (179), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:25:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2024-11-09 07:25:58,895 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 37 [2024-11-09 07:25:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:25:58,895 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2024-11-09 07:25:58,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:25:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2024-11-09 07:25:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 07:25:58,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:58,897 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:25:58,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 07:25:59,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 07:25:59,098 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:25:59,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:59,098 INFO L85 PathProgramCache]: Analyzing trace with hash 178833778, now seen corresponding path program 1 times [2024-11-09 07:25:59,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:59,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703991190] [2024-11-09 07:25:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:59,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:25:59,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:25:59,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703991190] [2024-11-09 07:25:59,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703991190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:25:59,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854120750] [2024-11-09 07:25:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:59,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:25:59,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:25:59,268 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:25:59,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 07:25:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:59,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:25:59,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:25:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:59,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:25:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:25:59,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854120750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:25:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338797560] [2024-11-09 07:25:59,551 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 07:25:59,554 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:25:59,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:25:59,554 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:25:59,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:25:59,904 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:25:59,913 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:25:59,921 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:02,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1338797560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:26:02,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:02,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [7, 6, 6] total 34 [2024-11-09 07:26:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545062351] [2024-11-09 07:26:02,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:26:02,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:26:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:26:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1012, Unknown=1, NotChecked=0, Total=1122 [2024-11-09 07:26:02,424 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:05,272 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] [2024-11-09 07:26:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:06,441 INFO L93 Difference]: Finished difference Result 157 states and 190 transitions. [2024-11-09 07:26:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 07:26:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2024-11-09 07:26:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:06,443 INFO L225 Difference]: With dead ends: 157 [2024-11-09 07:26:06,443 INFO L226 Difference]: Without dead ends: 157 [2024-11-09 07:26:06,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=144, Invalid=1337, Unknown=1, NotChecked=0, Total=1482 [2024-11-09 07:26:06,444 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:06,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 350 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 879 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 07:26:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-09 07:26:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2024-11-09 07:26:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 125 states have (on average 1.352) internal successors, (169), 139 states have internal predecessors, (169), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 189 transitions. [2024-11-09 07:26:06,450 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 189 transitions. Word has length 39 [2024-11-09 07:26:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:06,450 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 189 transitions. [2024-11-09 07:26:06,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 189 transitions. [2024-11-09 07:26:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 07:26:06,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:06,451 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:06,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:06,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:06,656 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:06,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2073229410, now seen corresponding path program 1 times [2024-11-09 07:26:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:06,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801707375] [2024-11-09 07:26:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:26:06,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:06,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801707375] [2024-11-09 07:26:06,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801707375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:06,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818008599] [2024-11-09 07:26:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:06,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:06,836 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:06,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 07:26:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:06,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:26:06,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:26:07,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:26:07,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818008599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:07,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [584918370] [2024-11-09 07:26:07,232 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2024-11-09 07:26:07,232 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:07,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:07,232 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:07,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:08,510 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:26:08,553 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:26:08,565 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [584918370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:26:18,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:18,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [8, 7, 7] total 39 [2024-11-09 07:26:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824614979] [2024-11-09 07:26:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:26:18,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 07:26:18,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 07:26:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1335, Unknown=2, NotChecked=0, Total=1482 [2024-11-09 07:26:18,665 INFO L87 Difference]: Start difference. First operand 156 states and 189 transitions. Second operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:23,008 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] [2024-11-09 07:26:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:23,929 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2024-11-09 07:26:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:26:23,930 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2024-11-09 07:26:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:23,931 INFO L225 Difference]: With dead ends: 164 [2024-11-09 07:26:23,931 INFO L226 Difference]: Without dead ends: 164 [2024-11-09 07:26:23,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=159, Invalid=1479, Unknown=2, NotChecked=0, Total=1640 [2024-11-09 07:26:23,932 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 15 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:23,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 685 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1328 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2024-11-09 07:26:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-09 07:26:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-11-09 07:26:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 133 states have (on average 1.3458646616541354) internal successors, (179), 147 states have internal predecessors, (179), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2024-11-09 07:26:23,939 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 39 [2024-11-09 07:26:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:23,939 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2024-11-09 07:26:23,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2024-11-09 07:26:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 07:26:23,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:23,941 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:23,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:24,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:24,144 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:24,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1923981579, now seen corresponding path program 1 times [2024-11-09 07:26:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402596946] [2024-11-09 07:26:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:24,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:24,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402596946] [2024-11-09 07:26:24,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402596946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:24,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805733228] [2024-11-09 07:26:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:24,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:24,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:24,276 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:24,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 07:26:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:24,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:26:24,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:24,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:24,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805733228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:24,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004259327] [2024-11-09 07:26:24,579 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 07:26:24,579 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:24,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:24,579 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:24,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:24,950 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:26:24,959 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:26:24,967 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2004259327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:26:27,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:27,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [6, 6, 6] total 35 [2024-11-09 07:26:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031830754] [2024-11-09 07:26:27,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:26:27,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 07:26:27,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 07:26:27,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1074, Unknown=1, NotChecked=0, Total=1190 [2024-11-09 07:26:27,439 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:30,278 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] [2024-11-09 07:26:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:31,784 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2024-11-09 07:26:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 07:26:31,785 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2024-11-09 07:26:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:31,786 INFO L225 Difference]: With dead ends: 173 [2024-11-09 07:26:31,786 INFO L226 Difference]: Without dead ends: 173 [2024-11-09 07:26:31,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=150, Invalid=1409, Unknown=1, NotChecked=0, Total=1560 [2024-11-09 07:26:31,788 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:31,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 405 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1044 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2024-11-09 07:26:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-09 07:26:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2024-11-09 07:26:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 136 states have (on average 1.338235294117647) internal successors, (182), 150 states have internal predecessors, (182), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2024-11-09 07:26:31,801 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 40 [2024-11-09 07:26:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:31,802 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2024-11-09 07:26:31,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2024-11-09 07:26:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 07:26:31,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:31,804 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:31,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:32,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:32,004 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:32,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash -153600213, now seen corresponding path program 1 times [2024-11-09 07:26:32,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:32,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144846723] [2024-11-09 07:26:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:32,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:26:32,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:32,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144846723] [2024-11-09 07:26:32,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144846723] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:26:32,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:26:32,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:26:32,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236072322] [2024-11-09 07:26:32,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:26:32,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:26:32,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:32,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:26:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:26:32,083 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:26:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:32,176 INFO L93 Difference]: Finished difference Result 166 states and 201 transitions. [2024-11-09 07:26:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:26:32,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2024-11-09 07:26:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:32,181 INFO L225 Difference]: With dead ends: 166 [2024-11-09 07:26:32,181 INFO L226 Difference]: Without dead ends: 166 [2024-11-09 07:26:32,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:26:32,182 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 37 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:32,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 136 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:26:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-09 07:26:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-11-09 07:26:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 136 states have (on average 1.3308823529411764) internal successors, (181), 149 states have internal predecessors, (181), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 201 transitions. [2024-11-09 07:26:32,192 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 201 transitions. Word has length 40 [2024-11-09 07:26:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:32,193 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 201 transitions. [2024-11-09 07:26:32,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:26:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 201 transitions. [2024-11-09 07:26:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:26:32,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:32,195 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:32,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-09 07:26:32,195 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:32,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash 574222875, now seen corresponding path program 1 times [2024-11-09 07:26:32,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:32,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854966712] [2024-11-09 07:26:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:32,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:32,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:32,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854966712] [2024-11-09 07:26:32,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854966712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:32,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866590837] [2024-11-09 07:26:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:32,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:32,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:32,414 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:32,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 07:26:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:32,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 07:26:32,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:32,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866590837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663113014] [2024-11-09 07:26:32,927 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 07:26:32,927 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:32,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:32,928 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:32,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:33,498 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:26:33,512 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:26:33,524 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:37,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11519#(and (exists ((|v_ULTIMATE.start_upsweep_~a#1.offset_47| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_50| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |v_ULTIMATE.start_upsweep_~a#1.offset_47| 0) (<= (+ (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_50|) 1) (* |ULTIMATE.start_upsweep_~right~0#1| 4)) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_upsweep_~right~0#1|))) (<= (+ |ULTIMATE.start_upsweep_~right~0#1| 1) (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~n#1|)))' at error location [2024-11-09 07:26:37,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:26:37,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:37,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-09 07:26:37,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472591208] [2024-11-09 07:26:37,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:26:37,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 07:26:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 07:26:37,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1735, Unknown=1, NotChecked=0, Total=1892 [2024-11-09 07:26:37,277 INFO L87 Difference]: Start difference. First operand 166 states and 201 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:37,712 INFO L93 Difference]: Finished difference Result 221 states and 273 transitions. [2024-11-09 07:26:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:26:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-09 07:26:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:37,714 INFO L225 Difference]: With dead ends: 221 [2024-11-09 07:26:37,714 INFO L226 Difference]: Without dead ends: 221 [2024-11-09 07:26:37,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=194, Invalid=2061, Unknown=1, NotChecked=0, Total=2256 [2024-11-09 07:26:37,715 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 53 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:37,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 553 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:26:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-09 07:26:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 194. [2024-11-09 07:26:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 164 states have (on average 1.3658536585365855) internal successors, (224), 177 states have internal predecessors, (224), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 244 transitions. [2024-11-09 07:26:37,722 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 244 transitions. Word has length 41 [2024-11-09 07:26:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:37,723 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 244 transitions. [2024-11-09 07:26:37,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 244 transitions. [2024-11-09 07:26:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:26:37,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:37,724 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:37,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:37,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 07:26:37,925 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:37,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash -768410541, now seen corresponding path program 1 times [2024-11-09 07:26:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:37,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592396670] [2024-11-09 07:26:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:26:38,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:38,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592396670] [2024-11-09 07:26:38,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592396670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:38,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819543702] [2024-11-09 07:26:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:38,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:38,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:38,121 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:38,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 07:26:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:38,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:26:38,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:38,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:38,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819543702] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:38,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372938207] [2024-11-09 07:26:38,469 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 07:26:38,469 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:38,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:38,469 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:38,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:38,802 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:26:38,814 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:26:38,826 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:41,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12225#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= 4 (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) |ULTIMATE.start_upsweep_#t~mem5#1|) (<= (select |#length| |ULTIMATE.start_main_~a~0#1.base|) 7) (= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:26:41,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:26:41,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:41,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-11-09 07:26:41,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759683663] [2024-11-09 07:26:41,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:26:41,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:26:41,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:26:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1452, Unknown=1, NotChecked=0, Total=1640 [2024-11-09 07:26:41,830 INFO L87 Difference]: Start difference. First operand 194 states and 244 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:42,322 INFO L93 Difference]: Finished difference Result 194 states and 225 transitions. [2024-11-09 07:26:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:26:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-09 07:26:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:42,323 INFO L225 Difference]: With dead ends: 194 [2024-11-09 07:26:42,323 INFO L226 Difference]: Without dead ends: 188 [2024-11-09 07:26:42,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=288, Invalid=2161, Unknown=1, NotChecked=0, Total=2450 [2024-11-09 07:26:42,324 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 112 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:42,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 421 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:26:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-09 07:26:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2024-11-09 07:26:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 155 states have (on average 1.2774193548387096) internal successors, (198), 168 states have internal predecessors, (198), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 218 transitions. [2024-11-09 07:26:42,332 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 218 transitions. Word has length 41 [2024-11-09 07:26:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:42,332 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 218 transitions. [2024-11-09 07:26:42,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:42,333 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 218 transitions. [2024-11-09 07:26:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 07:26:42,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:42,335 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:42,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 07:26:42,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 07:26:42,536 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:42,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1580910259, now seen corresponding path program 1 times [2024-11-09 07:26:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562593272] [2024-11-09 07:26:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:42,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:26:42,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:42,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562593272] [2024-11-09 07:26:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562593272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:26:42,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:26:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:26:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292693725] [2024-11-09 07:26:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:26:42,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:26:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:26:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:26:42,658 INFO L87 Difference]: Start difference. First operand 185 states and 218 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:26:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:42,727 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2024-11-09 07:26:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:26:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-11-09 07:26:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:42,729 INFO L225 Difference]: With dead ends: 184 [2024-11-09 07:26:42,729 INFO L226 Difference]: Without dead ends: 184 [2024-11-09 07:26:42,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:26:42,730 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 35 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:42,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 149 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:26:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-09 07:26:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-11-09 07:26:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 155 states have (on average 1.270967741935484) internal successors, (197), 167 states have internal predecessors, (197), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 217 transitions. [2024-11-09 07:26:42,736 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 217 transitions. Word has length 42 [2024-11-09 07:26:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:42,737 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 217 transitions. [2024-11-09 07:26:42,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:26:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 217 transitions. [2024-11-09 07:26:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 07:26:42,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:42,737 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:42,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-09 07:26:42,738 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:42,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1949576286, now seen corresponding path program 1 times [2024-11-09 07:26:42,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594607399] [2024-11-09 07:26:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:26:42,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:42,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594607399] [2024-11-09 07:26:42,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594607399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:42,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108590838] [2024-11-09 07:26:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:42,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:42,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:42,874 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:42,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 07:26:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:43,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:26:43,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:26:43,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:26:43,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108590838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:43,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003924096] [2024-11-09 07:26:43,248 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2024-11-09 07:26:43,249 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:43,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:43,249 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:43,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:44,864 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 128 for LOIs [2024-11-09 07:26:44,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:26:44,913 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:55,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13277#(and (= |ULTIMATE.start_check_~n#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_check_~sum~0#1| 0) (<= (select |#length| |ULTIMATE.start_main_~a0~0#1.base|) 3) (= |ULTIMATE.start_check_~a#1.offset| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 4 (select |#length| |ULTIMATE.start_check_~a#1.base|)) (exists ((|v_#memory_int_344| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_344| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_344| |ULTIMATE.start_main_~a~0#1.base|) 0 0)))) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1))' at error location [2024-11-09 07:26:55,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:26:55,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:55,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-09 07:26:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167585339] [2024-11-09 07:26:55,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:26:55,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:26:55,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:26:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1337, Unknown=2, NotChecked=0, Total=1482 [2024-11-09 07:26:55,420 INFO L87 Difference]: Start difference. First operand 184 states and 217 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:55,624 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2024-11-09 07:26:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:26:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2024-11-09 07:26:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:55,626 INFO L225 Difference]: With dead ends: 179 [2024-11-09 07:26:55,626 INFO L226 Difference]: Without dead ends: 179 [2024-11-09 07:26:55,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=143, Invalid=1337, Unknown=2, NotChecked=0, Total=1482 [2024-11-09 07:26:55,627 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:55,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 450 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:26:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-09 07:26:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2024-11-09 07:26:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 150 states have (on average 1.2666666666666666) internal successors, (190), 162 states have internal predecessors, (190), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 210 transitions. [2024-11-09 07:26:55,633 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 210 transitions. Word has length 42 [2024-11-09 07:26:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:55,634 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 210 transitions. [2024-11-09 07:26:55,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 210 transitions. [2024-11-09 07:26:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 07:26:55,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:55,635 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:55,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:55,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-09 07:26:55,836 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:55,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1763577570, now seen corresponding path program 1 times [2024-11-09 07:26:55,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:55,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84824828] [2024-11-09 07:26:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:55,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:26:55,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:55,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84824828] [2024-11-09 07:26:55,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84824828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:26:55,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:26:55,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:26:55,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64097139] [2024-11-09 07:26:55,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:26:55,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:26:55,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:55,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:26:55,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:26:55,908 INFO L87 Difference]: Start difference. First operand 179 states and 210 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:26:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:56,006 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2024-11-09 07:26:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:26:56,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-11-09 07:26:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:56,007 INFO L225 Difference]: With dead ends: 178 [2024-11-09 07:26:56,008 INFO L226 Difference]: Without dead ends: 178 [2024-11-09 07:26:56,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:26:56,008 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:56,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 131 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:26:56,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-09 07:26:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-09 07:26:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 150 states have (on average 1.26) internal successors, (189), 161 states have internal predecessors, (189), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2024-11-09 07:26:56,014 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 43 [2024-11-09 07:26:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:56,015 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2024-11-09 07:26:56,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:26:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2024-11-09 07:26:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 07:26:56,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:56,016 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:56,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-09 07:26:56,016 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:56,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1163670383, now seen corresponding path program 1 times [2024-11-09 07:26:56,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:56,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783717160] [2024-11-09 07:26:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:26:56,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:56,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783717160] [2024-11-09 07:26:56,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783717160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:26:56,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:26:56,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:26:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956383268] [2024-11-09 07:26:56,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:26:56,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:26:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:26:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:26:56,180 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:26:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:56,319 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2024-11-09 07:26:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:26:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2024-11-09 07:26:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:56,320 INFO L225 Difference]: With dead ends: 177 [2024-11-09 07:26:56,320 INFO L226 Difference]: Without dead ends: 177 [2024-11-09 07:26:56,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:26:56,321 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 111 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:56,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 189 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:26:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-09 07:26:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2024-11-09 07:26:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 150 states have (on average 1.2533333333333334) internal successors, (188), 160 states have internal predecessors, (188), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:26:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 208 transitions. [2024-11-09 07:26:56,327 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 208 transitions. Word has length 44 [2024-11-09 07:26:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:56,327 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 208 transitions. [2024-11-09 07:26:56,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:26:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 208 transitions. [2024-11-09 07:26:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:26:56,328 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:56,328 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:56,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-09 07:26:56,328 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:56,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1714043713, now seen corresponding path program 1 times [2024-11-09 07:26:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994445812] [2024-11-09 07:26:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:26:56,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:56,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994445812] [2024-11-09 07:26:56,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994445812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:26:56,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:26:56,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:26:56,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895922470] [2024-11-09 07:26:56,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:26:56,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:26:56,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:56,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:26:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:26:56,591 INFO L87 Difference]: Start difference. First operand 177 states and 208 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:26:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:56,824 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2024-11-09 07:26:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:26:56,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2024-11-09 07:26:56,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:56,826 INFO L225 Difference]: With dead ends: 176 [2024-11-09 07:26:56,826 INFO L226 Difference]: Without dead ends: 139 [2024-11-09 07:26:56,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:26:56,827 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 37 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:56,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 228 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:26:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-09 07:26:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-11-09 07:26:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 118 states have (on average 1.2796610169491525) internal successors, (151), 127 states have internal predecessors, (151), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:26:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 165 transitions. [2024-11-09 07:26:56,832 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 165 transitions. Word has length 45 [2024-11-09 07:26:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:56,832 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 165 transitions. [2024-11-09 07:26:56,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:26:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 165 transitions. [2024-11-09 07:26:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 07:26:56,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:56,833 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:56,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-09 07:26:56,834 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:26:56,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:56,834 INFO L85 PathProgramCache]: Analyzing trace with hash 752698323, now seen corresponding path program 1 times [2024-11-09 07:26:56,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:56,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839695029] [2024-11-09 07:26:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:56,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:26:56,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:56,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839695029] [2024-11-09 07:26:56,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839695029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:56,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11785358] [2024-11-09 07:26:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:56,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:56,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:56,992 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:56,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 07:26:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:57,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:26:57,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:26:57,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:26:57,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11785358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:57,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139365891] [2024-11-09 07:26:57,420 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 07:26:57,420 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:57,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:57,421 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:57,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:58,011 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:26:58,021 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:26:58,028 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:27:01,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14988#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_57| Int)) (and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |v_ULTIMATE.start_upsweep_~a#1.base_57|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (= (select |#valid| |v_ULTIMATE.start_upsweep_~a#1.base_57|) 1) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_57|)) (<= (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_57|) (+ (* |ULTIMATE.start_upsweep_~space~0#1| 4) (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 3)))) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:27:01,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:27:01,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:27:01,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-09 07:27:01,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399010414] [2024-11-09 07:27:01,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:01,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 07:27:01,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:01,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 07:27:01,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1486, Unknown=1, NotChecked=0, Total=1640 [2024-11-09 07:27:01,925 INFO L87 Difference]: Start difference. First operand 139 states and 165 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:02,222 INFO L93 Difference]: Finished difference Result 147 states and 171 transitions. [2024-11-09 07:27:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:27:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2024-11-09 07:27:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:02,224 INFO L225 Difference]: With dead ends: 147 [2024-11-09 07:27:02,224 INFO L226 Difference]: Without dead ends: 147 [2024-11-09 07:27:02,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=166, Invalid=1639, Unknown=1, NotChecked=0, Total=1806 [2024-11-09 07:27:02,225 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:02,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 393 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:27:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-09 07:27:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 126. [2024-11-09 07:27:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 114 states have internal predecessors, (132), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2024-11-09 07:27:02,229 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 46 [2024-11-09 07:27:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:02,230 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2024-11-09 07:27:02,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2024-11-09 07:27:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 07:27:02,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:02,231 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:02,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 07:27:02,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 07:27:02,432 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:02,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1526640182, now seen corresponding path program 2 times [2024-11-09 07:27:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:02,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121159057] [2024-11-09 07:27:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:27:02,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:02,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121159057] [2024-11-09 07:27:02,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121159057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:02,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858358642] [2024-11-09 07:27:02,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:27:02,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:02,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:27:02,799 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:27:02,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 07:27:02,934 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 07:27:02,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:27:02,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 07:27:02,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:27:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:27:03,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:27:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:27:03,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858358642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:27:03,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596693012] [2024-11-09 07:27:03,721 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 07:27:03,721 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:27:03,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:27:03,721 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:27:03,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:27:04,459 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:27:04,468 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:27:04,475 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:27:09,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15596#(and (<= (+ |ULTIMATE.start_upsweep_~right~0#1| 1) (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~n#1|)) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_59| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_56| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |v_ULTIMATE.start_upsweep_~a#1.offset_56| 0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (<= (+ (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_59|) 1) (* |ULTIMATE.start_upsweep_~right~0#1| 4)) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_upsweep_~right~0#1|))))' at error location [2024-11-09 07:27:09,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:27:09,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:27:09,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-11-09 07:27:09,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593936591] [2024-11-09 07:27:09,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:09,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:27:09,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:27:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2640, Unknown=1, NotChecked=0, Total=2862 [2024-11-09 07:27:09,137 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:27:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:11,404 INFO L93 Difference]: Finished difference Result 168 states and 194 transitions. [2024-11-09 07:27:11,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 07:27:11,405 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-09 07:27:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:11,406 INFO L225 Difference]: With dead ends: 168 [2024-11-09 07:27:11,406 INFO L226 Difference]: Without dead ends: 168 [2024-11-09 07:27:11,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=472, Invalid=4783, Unknown=1, NotChecked=0, Total=5256 [2024-11-09 07:27:11,407 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 231 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:11,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 513 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 07:27:11,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-09 07:27:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2024-11-09 07:27:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 114 states have internal predecessors, (131), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2024-11-09 07:27:11,416 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 47 [2024-11-09 07:27:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:11,416 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2024-11-09 07:27:11,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:27:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2024-11-09 07:27:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 07:27:11,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:11,417 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:11,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 07:27:11,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 07:27:11,618 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:11,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash -81205379, now seen corresponding path program 1 times [2024-11-09 07:27:11,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:11,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57485629] [2024-11-09 07:27:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:11,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:27:11,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57485629] [2024-11-09 07:27:11,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57485629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834334982] [2024-11-09 07:27:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:11,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:11,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:27:11,866 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:27:11,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 07:27:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:12,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 07:27:12,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:27:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:27:12,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:27:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:27:12,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834334982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:27:12,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101037556] [2024-11-09 07:27:12,696 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 07:27:12,696 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:27:12,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:27:12,696 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:27:12,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:27:13,091 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:27:13,099 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:27:13,106 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:27:16,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16259#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_61| Int)) (and (= (select |#valid| |v_ULTIMATE.start_upsweep_~a#1.base_61|) 1) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_61|)) (= (select (select |#memory_int| |v_ULTIMATE.start_upsweep_~a#1.base_61|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (<= (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_61|) (+ 7 (* 4 |ULTIMATE.start_upsweep_~left~0#1|))))) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:27:16,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:27:16,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:27:16,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-11-09 07:27:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878090772] [2024-11-09 07:27:16,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:16,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:27:16,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:27:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2149, Unknown=1, NotChecked=0, Total=2352 [2024-11-09 07:27:16,786 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 07:27:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:17,876 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2024-11-09 07:27:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 07:27:17,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-09 07:27:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:17,878 INFO L225 Difference]: With dead ends: 152 [2024-11-09 07:27:17,878 INFO L226 Difference]: Without dead ends: 152 [2024-11-09 07:27:17,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=300, Invalid=3121, Unknown=1, NotChecked=0, Total=3422 [2024-11-09 07:27:17,879 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 103 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:17,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 887 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:27:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-09 07:27:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 130. [2024-11-09 07:27:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 109 states have (on average 1.2293577981651376) internal successors, (134), 118 states have internal predecessors, (134), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2024-11-09 07:27:17,885 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 48 [2024-11-09 07:27:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:17,885 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2024-11-09 07:27:17,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 07:27:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2024-11-09 07:27:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 07:27:17,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:17,886 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:17,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 07:27:18,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 07:27:18,091 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:18,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1738890681, now seen corresponding path program 1 times [2024-11-09 07:27:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:18,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964914675] [2024-11-09 07:27:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 07:27:18,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964914675] [2024-11-09 07:27:18,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964914675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:27:18,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:27:18,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 07:27:18,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554347783] [2024-11-09 07:27:18,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:27:18,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:27:18,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:18,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:27:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:27:18,344 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:27:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:18,647 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2024-11-09 07:27:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 07:27:18,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2024-11-09 07:27:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:18,649 INFO L225 Difference]: With dead ends: 127 [2024-11-09 07:27:18,649 INFO L226 Difference]: Without dead ends: 127 [2024-11-09 07:27:18,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-09 07:27:18,650 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 59 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:18,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 159 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:27:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-09 07:27:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-09 07:27:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 115 states have internal predecessors, (130), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2024-11-09 07:27:18,654 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 48 [2024-11-09 07:27:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:18,655 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2024-11-09 07:27:18,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:27:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2024-11-09 07:27:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 07:27:18,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:18,656 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:18,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-09 07:27:18,656 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:18,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1928960742, now seen corresponding path program 1 times [2024-11-09 07:27:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:18,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475360356] [2024-11-09 07:27:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 07:27:18,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:18,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475360356] [2024-11-09 07:27:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475360356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:27:18,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:27:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 07:27:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188567693] [2024-11-09 07:27:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:27:18,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:27:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:27:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:27:18,883 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:27:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:19,152 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2024-11-09 07:27:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 07:27:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2024-11-09 07:27:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:19,154 INFO L225 Difference]: With dead ends: 125 [2024-11-09 07:27:19,154 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 07:27:19,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2024-11-09 07:27:19,155 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 47 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:19,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 166 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:27:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 07:27:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-09 07:27:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 113 states have internal predecessors, (128), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2024-11-09 07:27:19,159 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 49 [2024-11-09 07:27:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:19,159 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2024-11-09 07:27:19,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:27:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2024-11-09 07:27:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 07:27:19,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:19,160 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:19,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-09 07:27:19,160 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:19,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 732550012, now seen corresponding path program 1 times [2024-11-09 07:27:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722692229] [2024-11-09 07:27:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:27:19,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:19,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722692229] [2024-11-09 07:27:19,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722692229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:19,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727526862] [2024-11-09 07:27:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:19,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:19,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:27:19,425 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:27:19,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 07:27:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:19,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 07:27:19,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:27:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:27:19,638 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:27:19,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727526862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:27:19,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:27:19,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2024-11-09 07:27:19,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140034285] [2024-11-09 07:27:19,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:27:19,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:27:19,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:19,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:27:19,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:27:19,639 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:19,758 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2024-11-09 07:27:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:27:19,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2024-11-09 07:27:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:19,759 INFO L225 Difference]: With dead ends: 127 [2024-11-09 07:27:19,760 INFO L226 Difference]: Without dead ends: 127 [2024-11-09 07:27:19,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:27:19,760 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 25 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:19,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 168 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:27:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-09 07:27:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2024-11-09 07:27:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 114 states have internal predecessors, (129), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2024-11-09 07:27:19,764 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 50 [2024-11-09 07:27:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:19,765 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2024-11-09 07:27:19,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2024-11-09 07:27:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 07:27:19,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:19,766 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:19,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 07:27:19,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 07:27:19,967 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:19,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash -976341677, now seen corresponding path program 2 times [2024-11-09 07:27:19,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:19,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150502205] [2024-11-09 07:27:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:19,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:27:20,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:20,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150502205] [2024-11-09 07:27:20,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150502205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:20,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030794697] [2024-11-09 07:27:20,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:27:20,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:20,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:27:20,434 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:27:20,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 07:27:20,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:27:20,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:27:20,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 07:27:20,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:27:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 07:27:21,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:27:21,853 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 [2024-11-09 07:27:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:27:22,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030794697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:27:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755588891] [2024-11-09 07:27:22,107 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 07:27:22,107 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:27:22,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:27:22,107 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:27:22,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:27:22,537 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:27:22,545 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:27:22,551 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:27:26,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17885#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_63| Int)) (and (= 1 (select |#valid| |v_ULTIMATE.start_upsweep_~a#1.base_63|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_63|)) (<= (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_63|) (+ 7 (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (= (select (select |#memory_int| |v_ULTIMATE.start_upsweep_~a#1.base_63|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|)) |ULTIMATE.start_upsweep_#t~mem5#1|))) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:27:26,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:27:26,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:27:26,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2024-11-09 07:27:26,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582095107] [2024-11-09 07:27:26,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:26,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 07:27:26,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:26,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 07:27:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3878, Unknown=1, NotChecked=0, Total=4160 [2024-11-09 07:27:26,926 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 37 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 37 states have internal predecessors, (100), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-09 07:27:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:31,003 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2024-11-09 07:27:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 07:27:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 37 states have internal predecessors, (100), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 52 [2024-11-09 07:27:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:31,004 INFO L225 Difference]: With dead ends: 175 [2024-11-09 07:27:31,004 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 07:27:31,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1054, Invalid=9451, Unknown=1, NotChecked=0, Total=10506 [2024-11-09 07:27:31,006 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 477 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:31,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 579 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 07:27:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 07:27:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2024-11-09 07:27:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 125 states have (on average 1.176) internal successors, (147), 129 states have internal predecessors, (147), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2024-11-09 07:27:31,010 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 52 [2024-11-09 07:27:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:31,011 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2024-11-09 07:27:31,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 37 states have internal predecessors, (100), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-09 07:27:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2024-11-09 07:27:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 07:27:31,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:31,012 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:31,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 07:27:31,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:31,213 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:31,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -604771243, now seen corresponding path program 1 times [2024-11-09 07:27:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:31,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103061579] [2024-11-09 07:27:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:31,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:27:31,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103061579] [2024-11-09 07:27:31,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103061579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573105263] [2024-11-09 07:27:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:31,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:27:31,456 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:27:31,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 07:27:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:31,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:27:31,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:27:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:27:31,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:27:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:27:31,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573105263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:27:31,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688169900] [2024-11-09 07:27:31,958 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2024-11-09 07:27:31,958 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:27:31,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:27:31,958 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:27:31,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:27:36,760 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:27:36,774 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:27:36,785 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:27:41,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18638#(and (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_~a#1.offset|) (= |ULTIMATE.start_main_~a0~0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= 1 |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)))' at error location [2024-11-09 07:27:41,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:27:41,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:27:41,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2024-11-09 07:27:41,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461806869] [2024-11-09 07:27:41,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:41,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:27:41,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:27:41,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2351, Unknown=1, NotChecked=0, Total=2550 [2024-11-09 07:27:41,055 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:41,441 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2024-11-09 07:27:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:27:41,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2024-11-09 07:27:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:41,442 INFO L225 Difference]: With dead ends: 150 [2024-11-09 07:27:41,442 INFO L226 Difference]: Without dead ends: 150 [2024-11-09 07:27:41,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 115 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=251, Invalid=2940, Unknown=1, NotChecked=0, Total=3192 [2024-11-09 07:27:41,443 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:41,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 323 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:27:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-09 07:27:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2024-11-09 07:27:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 131 states have internal predecessors, (150), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2024-11-09 07:27:41,447 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 54 [2024-11-09 07:27:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:41,448 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2024-11-09 07:27:41,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2024-11-09 07:27:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 07:27:41,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:41,449 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:41,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 07:27:41,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-09 07:27:41,650 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:41,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash -831009702, now seen corresponding path program 2 times [2024-11-09 07:27:41,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:41,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552700814] [2024-11-09 07:27:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 07:27:41,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:41,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552700814] [2024-11-09 07:27:41,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552700814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:41,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770819128] [2024-11-09 07:27:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:27:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:27:41,801 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:27:41,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 07:27:41,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:27:41,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:27:41,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:27:41,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:27:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 07:27:42,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:27:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 07:27:42,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770819128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:27:42,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268712050] [2024-11-09 07:27:42,206 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 07:27:42,206 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:27:42,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:27:42,206 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:27:42,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:27:42,808 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:27:42,817 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:27:42,824 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:27:45,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19324#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_68| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_upsweep_~a#1.base_68|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= (select |#valid| |v_ULTIMATE.start_upsweep_~a#1.base_68|) 1) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_68|)) (<= (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_68|) (+ (* |ULTIMATE.start_upsweep_~space~0#1| 4) (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 3)))) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:27:45,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:27:45,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:27:45,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-09 07:27:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349904552] [2024-11-09 07:27:45,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:45,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:27:45,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:27:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1721, Unknown=1, NotChecked=0, Total=1892 [2024-11-09 07:27:45,906 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:46,182 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2024-11-09 07:27:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:27:46,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2024-11-09 07:27:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:46,184 INFO L225 Difference]: With dead ends: 146 [2024-11-09 07:27:46,184 INFO L226 Difference]: Without dead ends: 146 [2024-11-09 07:27:46,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=175, Invalid=1804, Unknown=1, NotChecked=0, Total=1980 [2024-11-09 07:27:46,185 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:46,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 382 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:27:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-09 07:27:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2024-11-09 07:27:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 131 states have internal predecessors, (150), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2024-11-09 07:27:46,189 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 56 [2024-11-09 07:27:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:46,190 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2024-11-09 07:27:46,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2024-11-09 07:27:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 07:27:46,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:46,191 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:46,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 07:27:46,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-09 07:27:46,392 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:46,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:46,392 INFO L85 PathProgramCache]: Analyzing trace with hash 923557932, now seen corresponding path program 3 times [2024-11-09 07:27:46,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:46,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758222678] [2024-11-09 07:27:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 07:27:46,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:46,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758222678] [2024-11-09 07:27:46,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758222678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:46,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951726020] [2024-11-09 07:27:46,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:27:46,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:46,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:27:46,839 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:27:46,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 07:27:47,003 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:27:47,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:27:47,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 07:27:47,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:27:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 07:27:47,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:27:47,799 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 28 treesize of output 24 [2024-11-09 07:27:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 07:27:48,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951726020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:27:48,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927196098] [2024-11-09 07:27:48,100 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 07:27:48,100 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:27:48,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:27:48,101 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:27:48,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:27:48,648 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:27:48,660 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:27:48,671 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:27:52,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20037#(and (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_70| Int)) (and (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_70|)) (<= (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_70|) (+ (* |ULTIMATE.start_upsweep_~space~0#1| 4) (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 3)) (= (select |#valid| |v_ULTIMATE.start_upsweep_~a#1.base_70|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_upsweep_~a#1.base_70|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|)) |ULTIMATE.start_upsweep_#t~mem5#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:27:52,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:27:52,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:27:52,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-09 07:27:52,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219557101] [2024-11-09 07:27:52,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:52,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 07:27:52,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 07:27:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3465, Unknown=1, NotChecked=0, Total=3782 [2024-11-09 07:27:52,985 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand has 33 states, 32 states have (on average 3.3125) internal successors, (106), 33 states have internal predecessors, (106), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:27:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:57,308 INFO L93 Difference]: Finished difference Result 226 states and 267 transitions. [2024-11-09 07:27:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 07:27:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 33 states have internal predecessors, (106), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 61 [2024-11-09 07:27:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:57,310 INFO L225 Difference]: With dead ends: 226 [2024-11-09 07:27:57,310 INFO L226 Difference]: Without dead ends: 226 [2024-11-09 07:27:57,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2879 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1205, Invalid=9096, Unknown=1, NotChecked=0, Total=10302 [2024-11-09 07:27:57,311 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 229 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:57,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 882 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 07:27:57,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-09 07:27:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 144. [2024-11-09 07:27:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 128 states have (on average 1.1796875) internal successors, (151), 132 states have internal predecessors, (151), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:27:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 165 transitions. [2024-11-09 07:27:57,315 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 165 transitions. Word has length 61 [2024-11-09 07:27:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:57,316 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 165 transitions. [2024-11-09 07:27:57,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 33 states have internal predecessors, (106), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:27:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 165 transitions. [2024-11-09 07:27:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 07:27:57,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:57,317 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:57,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 07:27:57,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-09 07:27:57,522 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:27:57,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:57,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1072521927, now seen corresponding path program 1 times [2024-11-09 07:27:57,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:57,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031450320] [2024-11-09 07:27:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:57,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:28:00,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:28:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031450320] [2024-11-09 07:28:00,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031450320] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:28:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68724971] [2024-11-09 07:28:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:00,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:00,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:28:00,699 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:28:00,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 07:28:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:00,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-09 07:28:00,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:28:01,377 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 13 treesize of output 9 [2024-11-09 07:28:01,662 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 9 treesize of output 3 [2024-11-09 07:28:01,759 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 [2024-11-09 07:28:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:28:01,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:28:02,123 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 36 treesize of output 32 [2024-11-09 07:28:02,757 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 33 treesize of output 31 [2024-11-09 07:28:02,766 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 36 treesize of output 29 [2024-11-09 07:28:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:28:03,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68724971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:28:03,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964642261] [2024-11-09 07:28:03,422 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2024-11-09 07:28:03,422 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:28:03,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:28:03,422 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:28:03,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:28:07,539 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:28:07,548 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:28:07,556 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:29:50,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20928#(and (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_~a#1.offset|) (= |ULTIMATE.start_main_~a0~0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= 1 |ULTIMATE.start_check_~n#1|) (exists ((|v_ULTIMATE.start_downsweep_~space#1_79| Int)) (and (<= |v_ULTIMATE.start_downsweep_~space#1_79| 0) (exists ((|v_ULTIMATE.start_downsweep_~space#1_77| Int)) (and (= (div |v_ULTIMATE.start_downsweep_~space#1_77| 2) |v_ULTIMATE.start_downsweep_~space#1_79|) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_77|))))) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)))' at error location [2024-11-09 07:29:50,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:29:50,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:29:50,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 18] total 52 [2024-11-09 07:29:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515607359] [2024-11-09 07:29:50,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:29:50,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 07:29:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:29:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 07:29:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=8314, Unknown=50, NotChecked=0, Total=8742 [2024-11-09 07:29:50,487 INFO L87 Difference]: Start difference. First operand 144 states and 165 transitions. Second operand has 52 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 50 states have internal predecessors, (126), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:30:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:30:16,257 INFO L93 Difference]: Finished difference Result 224 states and 258 transitions. [2024-11-09 07:30:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 07:30:16,257 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 50 states have internal predecessors, (126), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 61 [2024-11-09 07:30:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:30:16,258 INFO L225 Difference]: With dead ends: 224 [2024-11-09 07:30:16,258 INFO L226 Difference]: Without dead ends: 224 [2024-11-09 07:30:16,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4173 ImplicationChecksByTransitivity, 129.5s TimeCoverageRelationStatistics Valid=784, Invalid=13435, Unknown=61, NotChecked=0, Total=14280 [2024-11-09 07:30:16,259 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 301 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:30:16,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 621 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 07:30:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-09 07:30:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 166. [2024-11-09 07:30:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 150 states have (on average 1.1733333333333333) internal successors, (176), 154 states have internal predecessors, (176), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:30:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 190 transitions. [2024-11-09 07:30:16,264 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 190 transitions. Word has length 61 [2024-11-09 07:30:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:30:16,264 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 190 transitions. [2024-11-09 07:30:16,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 50 states have internal predecessors, (126), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:30:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 190 transitions. [2024-11-09 07:30:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 07:30:16,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:30:16,265 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:30:16,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 07:30:16,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-09 07:30:16,466 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:30:16,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:30:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash -60783453, now seen corresponding path program 1 times [2024-11-09 07:30:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:30:16,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910071475] [2024-11-09 07:30:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:30:16,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:30:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:30:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 07:30:16,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:30:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910071475] [2024-11-09 07:30:16,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910071475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:30:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781186589] [2024-11-09 07:30:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:30:16,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:30:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:30:16,934 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:30:16,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 07:30:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:30:17,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 07:30:17,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:30:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:30:17,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:30:17,745 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 24 treesize of output 20 [2024-11-09 07:30:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:30:17,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781186589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:30:17,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503700220] [2024-11-09 07:30:17,904 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2024-11-09 07:30:17,904 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:30:17,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:30:17,905 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:30:17,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:30:23,374 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:30:23,383 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:30:23,391 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:31:55,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21822#(and (exists ((|v_ULTIMATE.start_check_~a#1.base_21| Int) (|v_ULTIMATE.start_check_~a#1.offset_20| Int) (|v_ULTIMATE.start_check_~i~0#1_52| Int)) (and (<= 0 |v_ULTIMATE.start_check_~i~0#1_52|) (or (< (+ |v_ULTIMATE.start_check_~a#1.offset_20| (* |v_ULTIMATE.start_check_~i~0#1_52| 4)) 0) (< (select |#length| |v_ULTIMATE.start_check_~a#1.base_21|) (+ |v_ULTIMATE.start_check_~a#1.offset_20| (* |v_ULTIMATE.start_check_~i~0#1_52| 4) 4))))) (<= 1 |ULTIMATE.start_check_~n#1|))' at error location [2024-11-09 07:31:55,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:31:55,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:31:55,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-11-09 07:31:55,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735310353] [2024-11-09 07:31:55,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:31:55,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:31:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:31:55,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:31:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=4433, Unknown=47, NotChecked=0, Total=4830 [2024-11-09 07:31:55,671 INFO L87 Difference]: Start difference. First operand 166 states and 190 transitions. Second operand has 26 states, 25 states have (on average 5.8) internal successors, (145), 26 states have internal predecessors, (145), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:32:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:32:12,489 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2024-11-09 07:32:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:32:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.8) internal successors, (145), 26 states have internal predecessors, (145), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 65 [2024-11-09 07:32:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:32:12,490 INFO L225 Difference]: With dead ends: 183 [2024-11-09 07:32:12,490 INFO L226 Difference]: Without dead ends: 183 [2024-11-09 07:32:12,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=445, Invalid=5506, Unknown=55, NotChecked=0, Total=6006 [2024-11-09 07:32:12,491 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 189 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:32:12,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 264 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:32:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-09 07:32:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2024-11-09 07:32:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 157 states have internal predecessors, (179), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:32:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 193 transitions. [2024-11-09 07:32:12,495 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 193 transitions. Word has length 65 [2024-11-09 07:32:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:32:12,495 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 193 transitions. [2024-11-09 07:32:12,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.8) internal successors, (145), 26 states have internal predecessors, (145), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:32:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 193 transitions. [2024-11-09 07:32:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-09 07:32:12,497 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:32:12,497 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:32:12,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-09 07:32:12,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-09 07:32:12,697 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:32:12,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:32:12,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1957770988, now seen corresponding path program 4 times [2024-11-09 07:32:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:32:12,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938317028] [2024-11-09 07:32:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:32:12,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:32:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:32:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:32:13,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:32:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938317028] [2024-11-09 07:32:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938317028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:32:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260560536] [2024-11-09 07:32:13,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:32:13,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:32:13,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:32:13,010 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:32:13,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 07:32:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:32:13,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 07:32:13,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:32:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 07:32:13,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:32:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 07:32:13,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260560536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:32:13,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450179924] [2024-11-09 07:32:13,659 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 07:32:13,659 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:32:13,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:32:13,659 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:32:13,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:32:14,275 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:32:14,284 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:32:14,292 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:32:17,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22648#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_78| Int)) (and (<= (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_78|) (+ (* |ULTIMATE.start_upsweep_~space~0#1| 4) (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 3)) (= (select (select |#memory_int| |v_ULTIMATE.start_upsweep_~a#1.base_78|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= (select |#valid| |v_ULTIMATE.start_upsweep_~a#1.base_78|) 1) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_78|)))) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-09 07:32:17,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:32:17,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:32:17,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2024-11-09 07:32:17,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261044179] [2024-11-09 07:32:17,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:32:17,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 07:32:17,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:32:17,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 07:32:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2549, Unknown=1, NotChecked=0, Total=2756 [2024-11-09 07:32:17,940 INFO L87 Difference]: Start difference. First operand 169 states and 193 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:32:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:32:18,884 INFO L93 Difference]: Finished difference Result 308 states and 358 transitions. [2024-11-09 07:32:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:32:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2024-11-09 07:32:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:32:18,886 INFO L225 Difference]: With dead ends: 308 [2024-11-09 07:32:18,886 INFO L226 Difference]: Without dead ends: 308 [2024-11-09 07:32:18,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 155 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=298, Invalid=3483, Unknown=1, NotChecked=0, Total=3782 [2024-11-09 07:32:18,887 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 92 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:32:18,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 564 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:32:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-09 07:32:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 220. [2024-11-09 07:32:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 204 states have (on average 1.1911764705882353) internal successors, (243), 208 states have internal predecessors, (243), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:32:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 257 transitions. [2024-11-09 07:32:18,892 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 257 transitions. Word has length 66 [2024-11-09 07:32:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:32:18,893 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 257 transitions. [2024-11-09 07:32:18,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:32:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 257 transitions. [2024-11-09 07:32:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 07:32:18,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:32:18,894 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:32:18,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 07:32:19,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-09 07:32:19,095 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:32:19,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:32:19,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1647421723, now seen corresponding path program 3 times [2024-11-09 07:32:19,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:32:19,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517723271] [2024-11-09 07:32:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:32:19,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:32:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:32:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:32:19,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:32:19,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517723271] [2024-11-09 07:32:19,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517723271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:32:19,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391634357] [2024-11-09 07:32:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:32:19,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:32:19,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:32:19,522 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:32:19,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 07:32:19,708 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:32:19,708 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:32:19,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 07:32:19,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:32:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 33 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 07:32:19,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:32:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 07:32:20,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391634357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:32:20,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605436219] [2024-11-09 07:32:20,265 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 07:32:20,266 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:32:20,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:32:20,266 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:32:20,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:32:20,718 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:32:20,726 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:32:20,735 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:32:24,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23643#(and (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_80| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_77| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |v_ULTIMATE.start_upsweep_~a#1.offset_77| 0) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= (select (select |#memory_int| |v_ULTIMATE.start_upsweep_~a#1.base_80|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= (select |#valid| |v_ULTIMATE.start_upsweep_~a#1.base_80|) 1) (<= (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_80|) (+ 7 (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |v_ULTIMATE.start_upsweep_~a#1.base_80|)) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|))))' at error location [2024-11-09 07:32:24,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:32:24,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:32:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 24 [2024-11-09 07:32:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624034326] [2024-11-09 07:32:24,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:32:24,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 07:32:24,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:32:24,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 07:32:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2447, Unknown=1, NotChecked=0, Total=2652 [2024-11-09 07:32:24,495 INFO L87 Difference]: Start difference. First operand 220 states and 257 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:32:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:32:25,072 INFO L93 Difference]: Finished difference Result 270 states and 316 transitions. [2024-11-09 07:32:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:32:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2024-11-09 07:32:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:32:25,073 INFO L225 Difference]: With dead ends: 270 [2024-11-09 07:32:25,074 INFO L226 Difference]: Without dead ends: 270 [2024-11-09 07:32:25,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 160 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=285, Invalid=3136, Unknown=1, NotChecked=0, Total=3422 [2024-11-09 07:32:25,074 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:32:25,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 375 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:32:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-11-09 07:32:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 234. [2024-11-09 07:32:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 218 states have (on average 1.18348623853211) internal successors, (258), 222 states have internal predecessors, (258), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:32:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2024-11-09 07:32:25,080 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 67 [2024-11-09 07:32:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:32:25,080 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2024-11-09 07:32:25,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:32:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2024-11-09 07:32:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 07:32:25,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:32:25,081 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:32:25,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-09 07:32:25,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-09 07:32:25,284 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:32:25,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:32:25,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1716706176, now seen corresponding path program 1 times [2024-11-09 07:32:25,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:32:25,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599431497] [2024-11-09 07:32:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:32:25,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:32:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:32:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:32:29,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:32:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599431497] [2024-11-09 07:32:29,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599431497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:32:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868489201] [2024-11-09 07:32:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:32:29,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:32:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:32:29,857 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:32:29,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44b2e22-c5c2-4bbf-a7c0-451569a07711/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 07:32:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:32:30,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-09 07:32:30,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:32:30,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:32:30,200 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 7 treesize of output 6 [2024-11-09 07:32:30,384 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-09 07:32:30,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 07:32:30,522 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 15 treesize of output 10 [2024-11-09 07:32:30,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-09 07:32:30,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-09 07:32:30,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2024-11-09 07:32:30,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 14 [2024-11-09 07:32:31,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2024-11-09 07:32:32,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-09 07:32:33,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2024-11-09 07:32:33,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 105 [2024-11-09 07:32:37,003 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 0 case distinctions, treesize of input 203 treesize of output 175 [2024-11-09 07:32:37,012 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 37 treesize of output 31 [2024-11-09 07:32:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:32:37,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:35:36,804 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~left~1#1_64| Int) (v_ArrVal_982 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_79| Int) (|ULTIMATE.start_upsweep_#t~mem6#1| Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_132| Int) (v_ArrVal_975 Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_79| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_132| 1) (< 0 |v_ULTIMATE.start_downsweep_~left~1#1_64|) (let ((.cse5 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse5) |c_ULTIMATE.start_main_#t~mem17#1|) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse5) v_ArrVal_975)))) (let ((.cse1 (let ((.cse4 (+ (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_64|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store (let ((.cse3 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_132| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_79|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse5) 0))) (store .cse3 .cse2 (+ (select .cse3 .cse2) (select .cse3 .cse4)))) .cse4 v_ArrVal_982)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) (select .cse1 .cse2))))))) is different from false [2024-11-09 07:35:38,879 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~left~1#1_64| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_982 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_79| Int) (|ULTIMATE.start_upsweep_#t~mem6#1| Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_132| Int) (v_ArrVal_975 Int)) (or (let ((.cse5 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse5) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse5))) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse5) v_ArrVal_975)))) (let ((.cse1 (let ((.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_64|)))) (store (let ((.cse3 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_132| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_79|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)) (+ |ULTIMATE.start_main_~a~0#1.offset| 4 .cse5) 0))) (store .cse3 .cse2 (+ (select .cse3 .cse4) (select .cse3 .cse2)))) .cse4 v_ArrVal_982)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) (select .cse1 .cse2))))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_79| |ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_132| 1) (< 0 |v_ULTIMATE.start_downsweep_~left~1#1_64|))) is different from false [2024-11-09 07:35:41,023 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~left~1#1_64| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_982 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_79| Int) (|ULTIMATE.start_upsweep_#t~mem6#1| Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_132| Int) (v_ArrVal_975 Int)) (or (let ((.cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) v_ArrVal_975)))) (let ((.cse0 (let ((.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_64|)))) (store (let ((.cse3 (store (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_132| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_79|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)))) (store .cse3 .cse1 (select (store .cse3 .cse1 0) .cse4))) .cse4 v_ArrVal_982)))) (= (select .cse0 .cse1) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|)))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_79| |ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_132| 1) (< 0 |v_ULTIMATE.start_downsweep_~left~1#1_64|))) is different from false [2024-11-09 07:35:41,089 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_985 (Array Int Int)) (|v_ULTIMATE.start_downsweep_~left~1#1_64| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_982 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_79| Int) (|ULTIMATE.start_upsweep_#t~mem6#1| Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_132| Int) (v_ArrVal_975 Int)) (or (let ((.cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_985 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_985) |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) v_ArrVal_975)))) (let ((.cse1 (let ((.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_64|)))) (store (let ((.cse3 (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_132| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_79|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)))) (store .cse3 .cse2 (select (store .cse3 .cse2 0) .cse4))) .cse4 v_ArrVal_982)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) (select .cse1 .cse2)))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_79| |ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_132| 1) (< 0 |v_ULTIMATE.start_downsweep_~left~1#1_64|))) is different from false [2024-11-09 07:35:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868489201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:35:41,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64003174] [2024-11-09 07:35:41,094 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2024-11-09 07:35:41,094 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:35:41,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:35:41,095 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:35:41,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:35:47,068 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:35:47,078 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:35:47,095 INFO L180 IcfgInterpreter]: Interpretation finished