./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh --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 e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:05:38,818 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:05:38,885 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 15:05:38,890 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:05:38,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:05:38,916 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:05:38,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:05:38,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:05:38,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:05:38,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:05:38,918 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:05:38,919 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:05:38,919 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:05:38,920 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:05:38,920 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:05:38,921 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:05:38,921 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:05:38,922 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:05:38,922 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:05:38,923 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:05:38,923 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:05:38,927 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:05:38,928 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 15:05:38,928 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 15:05:38,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:05:38,929 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:05:38,929 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:05:38,930 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:05:38,930 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:05:38,930 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 15:05:38,931 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 15:05:38,931 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 15:05:38,931 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:05:38,932 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 15:05:38,932 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:05:38,932 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:05:38,932 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:05:38,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:05:38,933 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:05:38,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:05:38,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:05:38,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:05:38,934 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:05:38,934 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:05:38,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:05:38,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:05:38,934 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:05:38,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:05:38,935 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_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2023-12-02 15:05:39,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:05:39,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:05:39,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:05:39,160 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:05:39,160 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:05:39,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-12-02 15:05:42,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:05:42,257 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:05:42,257 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-12-02 15:05:42,274 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/data/22d07c449/3187c9074fdf49aba667e68dcc6d1e6c/FLAG0df190b23 [2023-12-02 15:05:42,287 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/data/22d07c449/3187c9074fdf49aba667e68dcc6d1e6c [2023-12-02 15:05:42,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:05:42,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:05:42,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:05:42,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:05:42,298 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:05:42,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620275fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42, skipping insertion in model container [2023-12-02 15:05:42,300 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:05:42,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:05:42,644 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:05:42,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:05:42,729 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:05:42,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42 WrapperNode [2023-12-02 15:05:42,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:05:42,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:05:42,731 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:05:42,731 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:05:42,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,785 INFO L138 Inliner]: procedures = 125, calls = 84, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 304 [2023-12-02 15:05:42,785 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:05:42,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:05:42,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:05:42,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:05:42,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,802 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,813 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,822 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,824 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:05:42,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:05:42,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:05:42,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:05:42,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (1/1) ... [2023-12-02 15:05:42,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:05:42,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:05:42,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:05:42,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:05:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:05:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-12-02 15:05:42,907 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-12-02 15:05:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-12-02 15:05:42,907 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-12-02 15:05:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:05:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 15:05:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:05:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:05:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 15:05:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 15:05:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:05:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:05:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:05:42,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:05:43,057 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:05:43,059 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:05:43,637 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:05:43,703 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:05:43,704 INFO L309 CfgBuilder]: Removed 33 assume(true) statements. [2023-12-02 15:05:43,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:05:43 BoogieIcfgContainer [2023-12-02 15:05:43,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:05:43,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:05:43,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:05:43,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:05:43,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:05:42" (1/3) ... [2023-12-02 15:05:43,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f72b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:05:43, skipping insertion in model container [2023-12-02 15:05:43,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:05:42" (2/3) ... [2023-12-02 15:05:43,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f72b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:05:43, skipping insertion in model container [2023-12-02 15:05:43,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:05:43" (3/3) ... [2023-12-02 15:05:43,713 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2023-12-02 15:05:43,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:05:43,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 105 error locations. [2023-12-02 15:05:43,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:05:43,776 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67db6f78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:05:43,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 105 error locations. [2023-12-02 15:05:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 110 states have (on average 2.481818181818182) internal successors, (273), 230 states have internal predecessors, (273), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 15:05:43,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 15:05:43,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:43,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 15:05:43,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:43,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 19246841, now seen corresponding path program 1 times [2023-12-02 15:05:43,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:43,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195799518] [2023-12-02 15:05:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:43,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:43,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195799518] [2023-12-02 15:05:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195799518] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:43,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:43,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:05:43,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090781653] [2023-12-02 15:05:43,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:43,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:05:43,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:05:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:44,014 INFO L87 Difference]: Start difference. First operand has 233 states, 110 states have (on average 2.481818181818182) internal successors, (273), 230 states have internal predecessors, (273), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:44,229 INFO L93 Difference]: Finished difference Result 229 states and 254 transitions. [2023-12-02 15:05:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:05:44,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 15:05:44,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:44,242 INFO L225 Difference]: With dead ends: 229 [2023-12-02 15:05:44,242 INFO L226 Difference]: Without dead ends: 228 [2023-12-02 15:05:44,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:44,246 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 8 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:44,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 362 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:05:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-12-02 15:05:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2023-12-02 15:05:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 109 states have (on average 2.165137614678899) internal successors, (236), 225 states have internal predecessors, (236), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 253 transitions. [2023-12-02 15:05:44,299 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 253 transitions. Word has length 4 [2023-12-02 15:05:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:44,299 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 253 transitions. [2023-12-02 15:05:44,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 253 transitions. [2023-12-02 15:05:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 15:05:44,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:44,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 15:05:44,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:05:44,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:44,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash 19246842, now seen corresponding path program 1 times [2023-12-02 15:05:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:44,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337689792] [2023-12-02 15:05:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:44,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:44,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:44,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337689792] [2023-12-02 15:05:44,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337689792] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:44,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:44,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:05:44,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864304321] [2023-12-02 15:05:44,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:44,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:05:44,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:05:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:44,401 INFO L87 Difference]: Start difference. First operand 228 states and 253 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:44,584 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2023-12-02 15:05:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:05:44,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 15:05:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:44,589 INFO L225 Difference]: With dead ends: 226 [2023-12-02 15:05:44,589 INFO L226 Difference]: Without dead ends: 226 [2023-12-02 15:05:44,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:44,591 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 6 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:44,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 369 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:05:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-02 15:05:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-12-02 15:05:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 109 states have (on average 2.146788990825688) internal successors, (234), 223 states have internal predecessors, (234), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 251 transitions. [2023-12-02 15:05:44,609 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 251 transitions. Word has length 4 [2023-12-02 15:05:44,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:44,610 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 251 transitions. [2023-12-02 15:05:44,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 251 transitions. [2023-12-02 15:05:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:05:44,611 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:44,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 15:05:44,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:05:44,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:44,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:44,612 INFO L85 PathProgramCache]: Analyzing trace with hash 596106590, now seen corresponding path program 1 times [2023-12-02 15:05:44,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:44,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774886510] [2023-12-02 15:05:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:44,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:44,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774886510] [2023-12-02 15:05:44,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774886510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:44,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:44,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:05:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774303022] [2023-12-02 15:05:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:44,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:05:44,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:05:44,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:44,641 INFO L87 Difference]: Start difference. First operand 226 states and 251 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:44,862 INFO L93 Difference]: Finished difference Result 351 states and 395 transitions. [2023-12-02 15:05:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:05:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 15:05:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:44,869 INFO L225 Difference]: With dead ends: 351 [2023-12-02 15:05:44,869 INFO L226 Difference]: Without dead ends: 350 [2023-12-02 15:05:44,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:44,871 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 125 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:44,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 315 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:05:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-12-02 15:05:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 229. [2023-12-02 15:05:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 112 states have (on average 2.125) internal successors, (238), 226 states have internal predecessors, (238), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 255 transitions. [2023-12-02 15:05:44,891 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 255 transitions. Word has length 5 [2023-12-02 15:05:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:44,892 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 255 transitions. [2023-12-02 15:05:44,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 255 transitions. [2023-12-02 15:05:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 15:05:44,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:44,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 15:05:44,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 15:05:44,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:44,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1316884147, now seen corresponding path program 1 times [2023-12-02 15:05:44,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:44,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934698228] [2023-12-02 15:05:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:44,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:44,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:44,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934698228] [2023-12-02 15:05:44,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934698228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:44,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:44,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:05:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826264403] [2023-12-02 15:05:44,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:05:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:05:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:44,976 INFO L87 Difference]: Start difference. First operand 229 states and 255 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:45,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:45,123 INFO L93 Difference]: Finished difference Result 227 states and 253 transitions. [2023-12-02 15:05:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:05:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 15:05:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:45,126 INFO L225 Difference]: With dead ends: 227 [2023-12-02 15:05:45,126 INFO L226 Difference]: Without dead ends: 227 [2023-12-02 15:05:45,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:45,128 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 3 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:45,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 360 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:05:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-02 15:05:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-12-02 15:05:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 112 states have (on average 2.107142857142857) internal successors, (236), 224 states have internal predecessors, (236), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2023-12-02 15:05:45,141 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 6 [2023-12-02 15:05:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:45,141 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2023-12-02 15:05:45,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2023-12-02 15:05:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 15:05:45,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:45,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 15:05:45,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:05:45,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:45,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1316884148, now seen corresponding path program 1 times [2023-12-02 15:05:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:45,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997953616] [2023-12-02 15:05:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:45,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:45,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997953616] [2023-12-02 15:05:45,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997953616] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:45,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:45,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:05:45,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122594361] [2023-12-02 15:05:45,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:45,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:05:45,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:45,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:05:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:45,237 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:45,375 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2023-12-02 15:05:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:05:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 15:05:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:45,377 INFO L225 Difference]: With dead ends: 225 [2023-12-02 15:05:45,377 INFO L226 Difference]: Without dead ends: 225 [2023-12-02 15:05:45,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:45,378 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:45,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 367 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:05:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-12-02 15:05:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-12-02 15:05:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 222 states have internal predecessors, (234), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 251 transitions. [2023-12-02 15:05:45,389 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 251 transitions. Word has length 6 [2023-12-02 15:05:45,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:45,390 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 251 transitions. [2023-12-02 15:05:45,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 251 transitions. [2023-12-02 15:05:45,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 15:05:45,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:45,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:45,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 15:05:45,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:45,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1627403256, now seen corresponding path program 1 times [2023-12-02 15:05:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:45,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753965406] [2023-12-02 15:05:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:45,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:45,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753965406] [2023-12-02 15:05:45,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753965406] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:45,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:45,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:05:45,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898877702] [2023-12-02 15:05:45,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:45,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:05:45,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:45,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:05:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:45,420 INFO L87 Difference]: Start difference. First operand 225 states and 251 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:45,499 INFO L93 Difference]: Finished difference Result 231 states and 255 transitions. [2023-12-02 15:05:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:05:45,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 15:05:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:45,504 INFO L225 Difference]: With dead ends: 231 [2023-12-02 15:05:45,504 INFO L226 Difference]: Without dead ends: 230 [2023-12-02 15:05:45,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:05:45,505 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 5 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:45,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 419 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:05:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-12-02 15:05:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2023-12-02 15:05:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 111 states have (on average 2.09009009009009) internal successors, (232), 221 states have internal predecessors, (232), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 249 transitions. [2023-12-02 15:05:45,513 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 249 transitions. Word has length 7 [2023-12-02 15:05:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:45,514 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 249 transitions. [2023-12-02 15:05:45,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 249 transitions. [2023-12-02 15:05:45,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:05:45,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:45,515 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 15:05:45,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:45,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:45,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1157839681, now seen corresponding path program 1 times [2023-12-02 15:05:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:45,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951223480] [2023-12-02 15:05:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:45,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:45,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:45,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951223480] [2023-12-02 15:05:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951223480] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:45,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:45,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:05:45,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725583848] [2023-12-02 15:05:45,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:45,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:05:45,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:45,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:05:45,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:05:45,593 INFO L87 Difference]: Start difference. First operand 224 states and 249 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:45,756 INFO L93 Difference]: Finished difference Result 355 states and 395 transitions. [2023-12-02 15:05:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:05:45,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 15:05:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:45,759 INFO L225 Difference]: With dead ends: 355 [2023-12-02 15:05:45,759 INFO L226 Difference]: Without dead ends: 355 [2023-12-02 15:05:45,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:05:45,760 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 199 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:45,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 551 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:05:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-12-02 15:05:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 224. [2023-12-02 15:05:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 111 states have (on average 2.081081081081081) internal successors, (231), 221 states have internal predecessors, (231), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 248 transitions. [2023-12-02 15:05:45,770 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 248 transitions. Word has length 11 [2023-12-02 15:05:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:45,771 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 248 transitions. [2023-12-02 15:05:45,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 248 transitions. [2023-12-02 15:05:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 15:05:45,772 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:45,772 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:45,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 15:05:45,772 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:45,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash 287024411, now seen corresponding path program 1 times [2023-12-02 15:05:45,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:45,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50120937] [2023-12-02 15:05:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:45,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:45,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:45,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50120937] [2023-12-02 15:05:45,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50120937] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:45,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:45,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:05:45,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365460709] [2023-12-02 15:05:45,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:45,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:05:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:05:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:05:45,875 INFO L87 Difference]: Start difference. First operand 224 states and 248 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:46,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:46,210 INFO L93 Difference]: Finished difference Result 280 states and 313 transitions. [2023-12-02 15:05:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:05:46,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 15:05:46,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:46,212 INFO L225 Difference]: With dead ends: 280 [2023-12-02 15:05:46,212 INFO L226 Difference]: Without dead ends: 280 [2023-12-02 15:05:46,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:46,213 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 208 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:46,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 383 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:05:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-12-02 15:05:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 217. [2023-12-02 15:05:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 113 states have (on average 2.0) internal successors, (226), 214 states have internal predecessors, (226), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2023-12-02 15:05:46,222 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 13 [2023-12-02 15:05:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:46,222 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2023-12-02 15:05:46,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2023-12-02 15:05:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 15:05:46,223 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:46,223 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:46,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 15:05:46,223 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:46,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash 287024412, now seen corresponding path program 1 times [2023-12-02 15:05:46,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:46,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341316706] [2023-12-02 15:05:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:46,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:46,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341316706] [2023-12-02 15:05:46,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341316706] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:46,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:46,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:05:46,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294699133] [2023-12-02 15:05:46,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:46,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:05:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:05:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:05:46,386 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:46,755 INFO L93 Difference]: Finished difference Result 327 states and 368 transitions. [2023-12-02 15:05:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:05:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 15:05:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:46,758 INFO L225 Difference]: With dead ends: 327 [2023-12-02 15:05:46,758 INFO L226 Difference]: Without dead ends: 327 [2023-12-02 15:05:46,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:46,759 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 207 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:46,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 472 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:05:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-12-02 15:05:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 261. [2023-12-02 15:05:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 157 states have (on average 1.8853503184713376) internal successors, (296), 258 states have internal predecessors, (296), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 313 transitions. [2023-12-02 15:05:46,766 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 313 transitions. Word has length 13 [2023-12-02 15:05:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:46,766 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 313 transitions. [2023-12-02 15:05:46,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 313 transitions. [2023-12-02 15:05:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 15:05:46,767 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:46,767 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:46,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 15:05:46,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:46,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:46,768 INFO L85 PathProgramCache]: Analyzing trace with hash 963354789, now seen corresponding path program 1 times [2023-12-02 15:05:46,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:46,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358737215] [2023-12-02 15:05:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:46,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:46,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:46,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358737215] [2023-12-02 15:05:46,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358737215] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:46,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:46,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:05:46,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140534329] [2023-12-02 15:05:46,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:05:46,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:05:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:05:46,822 INFO L87 Difference]: Start difference. First operand 261 states and 313 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:47,017 INFO L93 Difference]: Finished difference Result 378 states and 423 transitions. [2023-12-02 15:05:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:05:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 15:05:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:47,019 INFO L225 Difference]: With dead ends: 378 [2023-12-02 15:05:47,019 INFO L226 Difference]: Without dead ends: 378 [2023-12-02 15:05:47,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:47,020 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 263 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:47,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 693 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:05:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-12-02 15:05:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 260. [2023-12-02 15:05:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 157 states have (on average 1.8662420382165605) internal successors, (293), 257 states have internal predecessors, (293), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 309 transitions. [2023-12-02 15:05:47,027 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 309 transitions. Word has length 15 [2023-12-02 15:05:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:47,028 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 309 transitions. [2023-12-02 15:05:47,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 309 transitions. [2023-12-02 15:05:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 15:05:47,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:47,028 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:47,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 15:05:47,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:47,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash -474178139, now seen corresponding path program 1 times [2023-12-02 15:05:47,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:47,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683925287] [2023-12-02 15:05:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:05:47,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:47,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683925287] [2023-12-02 15:05:47,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683925287] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:47,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:47,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:05:47,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411618881] [2023-12-02 15:05:47,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:47,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:05:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:05:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:05:47,113 INFO L87 Difference]: Start difference. First operand 260 states and 309 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:47,307 INFO L93 Difference]: Finished difference Result 259 states and 306 transitions. [2023-12-02 15:05:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:05:47,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 15:05:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:47,309 INFO L225 Difference]: With dead ends: 259 [2023-12-02 15:05:47,310 INFO L226 Difference]: Without dead ends: 259 [2023-12-02 15:05:47,310 INFO L412 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 [2023-12-02 15:05:47,311 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 18 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:47,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 688 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:05:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-02 15:05:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-12-02 15:05:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 157 states have (on average 1.8535031847133758) internal successors, (291), 256 states have internal predecessors, (291), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 306 transitions. [2023-12-02 15:05:47,318 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 306 transitions. Word has length 22 [2023-12-02 15:05:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 306 transitions. [2023-12-02 15:05:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 306 transitions. [2023-12-02 15:05:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 15:05:47,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:47,319 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:47,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 15:05:47,319 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:47,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1519961105, now seen corresponding path program 1 times [2023-12-02 15:05:47,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:47,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650421414] [2023-12-02 15:05:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:47,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:05:47,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:47,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650421414] [2023-12-02 15:05:47,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650421414] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:47,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:47,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:05:47,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214991815] [2023-12-02 15:05:47,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:47,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:05:47,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:05:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:05:47,424 INFO L87 Difference]: Start difference. First operand 259 states and 306 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:47,618 INFO L93 Difference]: Finished difference Result 258 states and 303 transitions. [2023-12-02 15:05:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:05:47,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 15:05:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:47,620 INFO L225 Difference]: With dead ends: 258 [2023-12-02 15:05:47,620 INFO L226 Difference]: Without dead ends: 258 [2023-12-02 15:05:47,621 INFO L412 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 [2023-12-02 15:05:47,621 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 19 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:47,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 678 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:05:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-02 15:05:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2023-12-02 15:05:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 157 states have (on average 1.8407643312101911) internal successors, (289), 255 states have internal predecessors, (289), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 303 transitions. [2023-12-02 15:05:47,629 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 303 transitions. Word has length 22 [2023-12-02 15:05:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:47,629 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 303 transitions. [2023-12-02 15:05:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 303 transitions. [2023-12-02 15:05:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:05:47,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:47,630 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:47,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 15:05:47,631 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:47,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1265066606, now seen corresponding path program 1 times [2023-12-02 15:05:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:47,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032403838] [2023-12-02 15:05:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:47,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:47,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:47,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032403838] [2023-12-02 15:05:47,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032403838] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:47,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:47,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:47,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108517402] [2023-12-02 15:05:47,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:47,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:05:47,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:05:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:05:47,877 INFO L87 Difference]: Start difference. First operand 258 states and 303 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:48,388 INFO L93 Difference]: Finished difference Result 307 states and 341 transitions. [2023-12-02 15:05:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:05:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 15:05:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:48,391 INFO L225 Difference]: With dead ends: 307 [2023-12-02 15:05:48,391 INFO L226 Difference]: Without dead ends: 307 [2023-12-02 15:05:48,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:05:48,392 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 172 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:48,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 817 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:05:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-02 15:05:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 259. [2023-12-02 15:05:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8417721518987342) internal successors, (291), 256 states have internal predecessors, (291), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 305 transitions. [2023-12-02 15:05:48,400 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 305 transitions. Word has length 24 [2023-12-02 15:05:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:48,400 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 305 transitions. [2023-12-02 15:05:48,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 305 transitions. [2023-12-02 15:05:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:05:48,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:48,401 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:48,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 15:05:48,402 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:48,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:48,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1265066607, now seen corresponding path program 1 times [2023-12-02 15:05:48,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:48,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314507243] [2023-12-02 15:05:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:48,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:48,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:48,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314507243] [2023-12-02 15:05:48,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314507243] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:48,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:48,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:05:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563909492] [2023-12-02 15:05:48,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:48,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:05:48,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:05:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:05:48,818 INFO L87 Difference]: Start difference. First operand 259 states and 305 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:49,406 INFO L93 Difference]: Finished difference Result 315 states and 349 transitions. [2023-12-02 15:05:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:05:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 15:05:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:49,409 INFO L225 Difference]: With dead ends: 315 [2023-12-02 15:05:49,409 INFO L226 Difference]: Without dead ends: 315 [2023-12-02 15:05:49,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:05:49,410 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 181 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:49,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 771 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:05:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-12-02 15:05:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 259. [2023-12-02 15:05:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8354430379746836) internal successors, (290), 256 states have internal predecessors, (290), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 304 transitions. [2023-12-02 15:05:49,417 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 304 transitions. Word has length 24 [2023-12-02 15:05:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:49,418 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 304 transitions. [2023-12-02 15:05:49,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 304 transitions. [2023-12-02 15:05:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:05:49,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:49,419 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:49,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 15:05:49,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:49,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:49,420 INFO L85 PathProgramCache]: Analyzing trace with hash 569020687, now seen corresponding path program 1 times [2023-12-02 15:05:49,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:49,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838401957] [2023-12-02 15:05:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:49,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:49,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:49,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838401957] [2023-12-02 15:05:49,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838401957] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:49,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:49,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:49,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078186263] [2023-12-02 15:05:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:49,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:49,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:49,537 INFO L87 Difference]: Start difference. First operand 259 states and 304 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:49,853 INFO L93 Difference]: Finished difference Result 317 states and 350 transitions. [2023-12-02 15:05:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:05:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 15:05:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:49,855 INFO L225 Difference]: With dead ends: 317 [2023-12-02 15:05:49,855 INFO L226 Difference]: Without dead ends: 317 [2023-12-02 15:05:49,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:05:49,856 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 184 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:49,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 946 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:05:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-12-02 15:05:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 259. [2023-12-02 15:05:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8291139240506329) internal successors, (289), 256 states have internal predecessors, (289), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 303 transitions. [2023-12-02 15:05:49,864 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 303 transitions. Word has length 25 [2023-12-02 15:05:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:49,864 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 303 transitions. [2023-12-02 15:05:49,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 303 transitions. [2023-12-02 15:05:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:05:49,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:49,865 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:49,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 15:05:49,866 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:49,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:49,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1045036322, now seen corresponding path program 1 times [2023-12-02 15:05:49,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:49,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022427769] [2023-12-02 15:05:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:49,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:49,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:49,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022427769] [2023-12-02 15:05:49,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022427769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:49,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:50,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33277349] [2023-12-02 15:05:50,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:50,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:05:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:05:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:05:50,001 INFO L87 Difference]: Start difference. First operand 259 states and 303 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:50,278 INFO L93 Difference]: Finished difference Result 316 states and 348 transitions. [2023-12-02 15:05:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:05:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 15:05:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:50,281 INFO L225 Difference]: With dead ends: 316 [2023-12-02 15:05:50,281 INFO L226 Difference]: Without dead ends: 316 [2023-12-02 15:05:50,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:05:50,282 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 182 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:50,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 946 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:05:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-12-02 15:05:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2023-12-02 15:05:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8227848101265822) internal successors, (288), 256 states have internal predecessors, (288), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 302 transitions. [2023-12-02 15:05:50,290 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 302 transitions. Word has length 25 [2023-12-02 15:05:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:50,290 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 302 transitions. [2023-12-02 15:05:50,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 302 transitions. [2023-12-02 15:05:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:05:50,291 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:50,291 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:50,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 15:05:50,291 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:50,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash -936410096, now seen corresponding path program 1 times [2023-12-02 15:05:50,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:50,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907933678] [2023-12-02 15:05:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:50,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:50,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:50,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907933678] [2023-12-02 15:05:50,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907933678] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:50,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:50,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:05:50,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970274392] [2023-12-02 15:05:50,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:50,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:05:50,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:05:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:05:50,529 INFO L87 Difference]: Start difference. First operand 259 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:50,994 INFO L93 Difference]: Finished difference Result 303 states and 335 transitions. [2023-12-02 15:05:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:05:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 15:05:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:50,997 INFO L225 Difference]: With dead ends: 303 [2023-12-02 15:05:50,997 INFO L226 Difference]: Without dead ends: 303 [2023-12-02 15:05:50,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:05:50,998 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 164 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:50,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 817 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:05:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-12-02 15:05:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 259. [2023-12-02 15:05:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8164556962025316) internal successors, (287), 256 states have internal predecessors, (287), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 301 transitions. [2023-12-02 15:05:51,004 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 301 transitions. Word has length 24 [2023-12-02 15:05:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:51,004 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 301 transitions. [2023-12-02 15:05:51,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 301 transitions. [2023-12-02 15:05:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:05:51,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:51,005 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:05:51,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 15:05:51,006 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:51,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash -936410095, now seen corresponding path program 1 times [2023-12-02 15:05:51,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:51,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205662873] [2023-12-02 15:05:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:51,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:51,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205662873] [2023-12-02 15:05:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205662873] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:51,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:51,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:05:51,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777815028] [2023-12-02 15:05:51,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:51,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:05:51,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:51,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:05:51,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:05:51,279 INFO L87 Difference]: Start difference. First operand 259 states and 301 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:51,817 INFO L93 Difference]: Finished difference Result 311 states and 343 transitions. [2023-12-02 15:05:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:05:51,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 15:05:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:51,819 INFO L225 Difference]: With dead ends: 311 [2023-12-02 15:05:51,819 INFO L226 Difference]: Without dead ends: 311 [2023-12-02 15:05:51,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:05:51,820 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 174 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:51,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 695 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:05:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-12-02 15:05:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 259. [2023-12-02 15:05:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8101265822784811) internal successors, (286), 256 states have internal predecessors, (286), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 300 transitions. [2023-12-02 15:05:51,827 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 300 transitions. Word has length 24 [2023-12-02 15:05:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:51,828 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 300 transitions. [2023-12-02 15:05:51,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 300 transitions. [2023-12-02 15:05:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 15:05:51,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:51,829 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:05:51,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 15:05:51,829 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:51,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1053164132, now seen corresponding path program 1 times [2023-12-02 15:05:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:51,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679532626] [2023-12-02 15:05:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:51,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:52,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:52,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679532626] [2023-12-02 15:05:52,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679532626] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:52,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:52,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:05:52,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452334673] [2023-12-02 15:05:52,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:52,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:05:52,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:05:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:05:52,256 INFO L87 Difference]: Start difference. First operand 259 states and 300 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:52,783 INFO L93 Difference]: Finished difference Result 313 states and 344 transitions. [2023-12-02 15:05:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:05:52,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-02 15:05:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:52,785 INFO L225 Difference]: With dead ends: 313 [2023-12-02 15:05:52,785 INFO L226 Difference]: Without dead ends: 313 [2023-12-02 15:05:52,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:05:52,786 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 173 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:52,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1203 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:05:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-12-02 15:05:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 260. [2023-12-02 15:05:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 159 states have (on average 1.8050314465408805) internal successors, (287), 257 states have internal predecessors, (287), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 301 transitions. [2023-12-02 15:05:52,792 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 301 transitions. Word has length 29 [2023-12-02 15:05:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:52,792 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 301 transitions. [2023-12-02 15:05:52,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 301 transitions. [2023-12-02 15:05:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 15:05:52,793 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:52,793 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:05:52,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 15:05:52,793 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:52,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1631211375, now seen corresponding path program 1 times [2023-12-02 15:05:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:52,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516215069] [2023-12-02 15:05:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:52,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:53,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516215069] [2023-12-02 15:05:53,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516215069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:05:53,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:05:53,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:05:53,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370801219] [2023-12-02 15:05:53,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:05:53,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:05:53,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:05:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:05:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:05:53,214 INFO L87 Difference]: Start difference. First operand 260 states and 301 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:05:53,717 INFO L93 Difference]: Finished difference Result 312 states and 342 transitions. [2023-12-02 15:05:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:05:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-02 15:05:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:05:53,719 INFO L225 Difference]: With dead ends: 312 [2023-12-02 15:05:53,719 INFO L226 Difference]: Without dead ends: 312 [2023-12-02 15:05:53,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:05:53,720 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 171 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:05:53,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1203 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:05:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-12-02 15:05:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 260. [2023-12-02 15:05:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 159 states have (on average 1.79874213836478) internal successors, (286), 257 states have internal predecessors, (286), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:05:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 300 transitions. [2023-12-02 15:05:53,727 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 300 transitions. Word has length 29 [2023-12-02 15:05:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:05:53,727 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 300 transitions. [2023-12-02 15:05:53,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:05:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 300 transitions. [2023-12-02 15:05:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:05:53,728 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:05:53,728 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:05:53,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 15:05:53,728 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:05:53,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:05:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1576383330, now seen corresponding path program 1 times [2023-12-02 15:05:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:05:53,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344196709] [2023-12-02 15:05:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:53,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:05:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:53,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:05:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344196709] [2023-12-02 15:05:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344196709] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:05:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323053380] [2023-12-02 15:05:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:05:53,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:05:53,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:05:54,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:05:54,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:05:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:05:54,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 15:05:54,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:05:54,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:05:54,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:05:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:54,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:05:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:05:54,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323053380] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:05:54,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852550647] [2023-12-02 15:05:54,560 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 15:05:54,560 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:05:54,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:05:54,567 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:05:54,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:06:00,656 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:06:02,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11373#(and (or (and (= |ULTIMATE.start_inspect_before_~shape#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= |ULTIMATE.start_main_~data~0#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (not (= |ULTIMATE.start_main_~data~0#1.base| 0))) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_43| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_35| Int)) (and (= |ULTIMATE.start_inspect_before_~shape#1.offset| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 4))) (= |ULTIMATE.start_inspect_before_~shape#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 4))) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|)) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_35|) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) 1)))) (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0))' at error location [2023-12-02 15:06:02,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:06:02,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:06:02,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 14 [2023-12-02 15:06:02,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294426370] [2023-12-02 15:06:02,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:06:02,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 15:06:02,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:02,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 15:06:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=995, Unknown=3, NotChecked=0, Total=1122 [2023-12-02 15:06:02,796 INFO L87 Difference]: Start difference. First operand 260 states and 300 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:03,360 INFO L93 Difference]: Finished difference Result 357 states and 406 transitions. [2023-12-02 15:06:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:06:03,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 15:06:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:03,363 INFO L225 Difference]: With dead ends: 357 [2023-12-02 15:06:03,363 INFO L226 Difference]: Without dead ends: 357 [2023-12-02 15:06:03,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=138, Invalid=1119, Unknown=3, NotChecked=0, Total=1260 [2023-12-02 15:06:03,364 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 196 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:03,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1662 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:06:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-12-02 15:06:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 271. [2023-12-02 15:06:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 170 states have (on average 1.7529411764705882) internal successors, (298), 268 states have internal predecessors, (298), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 312 transitions. [2023-12-02 15:06:03,372 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 312 transitions. Word has length 28 [2023-12-02 15:06:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:03,372 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 312 transitions. [2023-12-02 15:06:03,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 312 transitions. [2023-12-02 15:06:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 15:06:03,373 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:03,373 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:06:03,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 15:06:03,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 15:06:03,574 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:03,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:03,574 INFO L85 PathProgramCache]: Analyzing trace with hash 6715688, now seen corresponding path program 1 times [2023-12-02 15:06:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741893670] [2023-12-02 15:06:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:06:03,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:03,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741893670] [2023-12-02 15:06:03,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741893670] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:03,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:03,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:03,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332418877] [2023-12-02 15:06:03,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:06:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:06:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:06:03,626 INFO L87 Difference]: Start difference. First operand 271 states and 312 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:03,895 INFO L93 Difference]: Finished difference Result 324 states and 374 transitions. [2023-12-02 15:06:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:06:03,896 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-02 15:06:03,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:03,898 INFO L225 Difference]: With dead ends: 324 [2023-12-02 15:06:03,898 INFO L226 Difference]: Without dead ends: 324 [2023-12-02 15:06:03,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:06:03,898 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 257 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:03,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 286 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:06:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-02 15:06:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 271. [2023-12-02 15:06:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 172 states have (on average 1.744186046511628) internal successors, (300), 268 states have internal predecessors, (300), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 314 transitions. [2023-12-02 15:06:03,905 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 314 transitions. Word has length 31 [2023-12-02 15:06:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:03,905 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 314 transitions. [2023-12-02 15:06:03,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 314 transitions. [2023-12-02 15:06:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 15:06:03,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:03,906 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:06:03,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 15:06:03,906 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:03,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash 6715689, now seen corresponding path program 1 times [2023-12-02 15:06:03,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:03,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065322528] [2023-12-02 15:06:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:03,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:04,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:04,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065322528] [2023-12-02 15:06:04,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065322528] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:04,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:04,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:06:04,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997030456] [2023-12-02 15:06:04,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:04,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:06:04,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:06:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:06:04,047 INFO L87 Difference]: Start difference. First operand 271 states and 314 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:04,408 INFO L93 Difference]: Finished difference Result 311 states and 344 transitions. [2023-12-02 15:06:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:06:04,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-02 15:06:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:04,411 INFO L225 Difference]: With dead ends: 311 [2023-12-02 15:06:04,411 INFO L226 Difference]: Without dead ends: 311 [2023-12-02 15:06:04,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:06:04,412 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 106 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:04,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 471 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:06:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-12-02 15:06:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 276. [2023-12-02 15:06:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 177 states have (on average 1.734463276836158) internal successors, (307), 273 states have internal predecessors, (307), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 321 transitions. [2023-12-02 15:06:04,420 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 321 transitions. Word has length 31 [2023-12-02 15:06:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:04,420 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 321 transitions. [2023-12-02 15:06:04,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 321 transitions. [2023-12-02 15:06:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 15:06:04,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:04,421 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:06:04,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 15:06:04,421 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:04,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 208509347, now seen corresponding path program 1 times [2023-12-02 15:06:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947252050] [2023-12-02 15:06:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:04,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:04,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:04,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947252050] [2023-12-02 15:06:04,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947252050] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:04,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:04,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:06:04,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566510550] [2023-12-02 15:06:04,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:04,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:06:04,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:04,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:06:04,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:06:04,495 INFO L87 Difference]: Start difference. First operand 276 states and 321 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:04,705 INFO L93 Difference]: Finished difference Result 426 states and 474 transitions. [2023-12-02 15:06:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:06:04,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-02 15:06:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:04,708 INFO L225 Difference]: With dead ends: 426 [2023-12-02 15:06:04,708 INFO L226 Difference]: Without dead ends: 426 [2023-12-02 15:06:04,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:06:04,708 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 281 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:04,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 747 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:06:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-12-02 15:06:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 276. [2023-12-02 15:06:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 177 states have (on average 1.728813559322034) internal successors, (306), 273 states have internal predecessors, (306), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2023-12-02 15:06:04,715 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 32 [2023-12-02 15:06:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:04,715 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2023-12-02 15:06:04,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2023-12-02 15:06:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 15:06:04,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:04,715 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:06:04,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 15:06:04,716 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:04,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:04,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2134110155, now seen corresponding path program 1 times [2023-12-02 15:06:04,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:04,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311993703] [2023-12-02 15:06:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:04,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:06:04,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:04,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311993703] [2023-12-02 15:06:04,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311993703] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:04,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:04,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:06:04,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242244039] [2023-12-02 15:06:04,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:04,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:06:04,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:04,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:06:04,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:06:04,776 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:05,051 INFO L93 Difference]: Finished difference Result 325 states and 373 transitions. [2023-12-02 15:06:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:06:05,051 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-02 15:06:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:05,053 INFO L225 Difference]: With dead ends: 325 [2023-12-02 15:06:05,053 INFO L226 Difference]: Without dead ends: 325 [2023-12-02 15:06:05,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:06:05,054 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 176 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:05,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 299 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:06:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-12-02 15:06:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 273. [2023-12-02 15:06:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 177 states have (on average 1.694915254237288) internal successors, (300), 270 states have internal predecessors, (300), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 314 transitions. [2023-12-02 15:06:05,061 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 314 transitions. Word has length 33 [2023-12-02 15:06:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:05,061 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 314 transitions. [2023-12-02 15:06:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 314 transitions. [2023-12-02 15:06:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 15:06:05,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:05,062 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:06:05,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 15:06:05,062 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:05,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2134110154, now seen corresponding path program 1 times [2023-12-02 15:06:05,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:05,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933748656] [2023-12-02 15:06:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:05,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:05,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:05,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933748656] [2023-12-02 15:06:05,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933748656] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:05,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:05,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:06:05,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880637173] [2023-12-02 15:06:05,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:06:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:06:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:06:05,200 INFO L87 Difference]: Start difference. First operand 273 states and 314 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:05,545 INFO L93 Difference]: Finished difference Result 302 states and 334 transitions. [2023-12-02 15:06:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:06:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-02 15:06:05,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:05,547 INFO L225 Difference]: With dead ends: 302 [2023-12-02 15:06:05,547 INFO L226 Difference]: Without dead ends: 302 [2023-12-02 15:06:05,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:06:05,547 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 115 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:05,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 460 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:06:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-12-02 15:06:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 273. [2023-12-02 15:06:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 177 states have (on average 1.6779661016949152) internal successors, (297), 270 states have internal predecessors, (297), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 311 transitions. [2023-12-02 15:06:05,555 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 311 transitions. Word has length 33 [2023-12-02 15:06:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:05,555 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 311 transitions. [2023-12-02 15:06:05,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 311 transitions. [2023-12-02 15:06:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 15:06:05,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:05,556 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 15:06:05,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 15:06:05,556 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:05,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash -933009889, now seen corresponding path program 2 times [2023-12-02 15:06:05,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:05,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169718742] [2023-12-02 15:06:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:06,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:06,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169718742] [2023-12-02 15:06:06,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169718742] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:06:06,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863158409] [2023-12-02 15:06:06,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:06:06,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:06:06,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:06:06,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:06:06,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:06:06,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 15:06:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:06:06,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 15:06:06,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:06:06,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:06:06,238 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:06:06,238 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 14 treesize of output 13 [2023-12-02 15:06:06,271 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-12-02 15:06:06,272 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 22 [2023-12-02 15:06:06,316 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 15 treesize of output 1 [2023-12-02 15:06:06,353 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 37 treesize of output 25 [2023-12-02 15:06:06,642 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 26 treesize of output 14 [2023-12-02 15:06:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:06,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:06:06,912 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 38 treesize of output 34 [2023-12-02 15:06:06,929 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:06:06,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 148 [2023-12-02 15:06:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863158409] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:06:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1456162947] [2023-12-02 15:06:07,129 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 15:06:07,129 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:06:07,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:06:07,130 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:06:07,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:06:12,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:06:17,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15344#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (or (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.offset_40| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.base_49| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 4)) |ULTIMATE.start_inspect_before_~shape#1.offset|) (= |ULTIMATE.start_inspect_before_~shape#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 4))) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) 1) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|)) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_40|))) (and (= |ULTIMATE.start_inspect_before_~shape#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= |ULTIMATE.start_main_~data~0#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (not (= |ULTIMATE.start_inspect_before_~shape#1.base| 0)))) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0))' at error location [2023-12-02 15:06:17,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:06:17,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:06:17,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 25 [2023-12-02 15:06:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470954167] [2023-12-02 15:06:17,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:06:17,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 15:06:17,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 15:06:17,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1789, Unknown=1, NotChecked=0, Total=1980 [2023-12-02 15:06:17,034 INFO L87 Difference]: Start difference. First operand 273 states and 311 transitions. Second operand has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:18,406 INFO L93 Difference]: Finished difference Result 390 states and 442 transitions. [2023-12-02 15:06:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 15:06:18,407 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 15:06:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:18,409 INFO L225 Difference]: With dead ends: 390 [2023-12-02 15:06:18,409 INFO L226 Difference]: Without dead ends: 390 [2023-12-02 15:06:18,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=338, Invalid=2741, Unknown=1, NotChecked=0, Total=3080 [2023-12-02 15:06:18,411 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 692 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:18,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1773 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1946 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:06:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-12-02 15:06:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 274. [2023-12-02 15:06:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 178 states have (on average 1.6797752808988764) internal successors, (299), 271 states have internal predecessors, (299), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 313 transitions. [2023-12-02 15:06:18,418 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 313 transitions. Word has length 34 [2023-12-02 15:06:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:18,418 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 313 transitions. [2023-12-02 15:06:18,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 313 transitions. [2023-12-02 15:06:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 15:06:18,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:18,419 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 15:06:18,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:06:18,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 15:06:18,619 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:18,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash -933009888, now seen corresponding path program 1 times [2023-12-02 15:06:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:18,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216210805] [2023-12-02 15:06:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:18,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:19,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:19,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216210805] [2023-12-02 15:06:19,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216210805] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:06:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576252699] [2023-12-02 15:06:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:19,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:06:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:06:19,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:06:19,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:06:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:19,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 15:06:19,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:06:19,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:06:19,997 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 15:06:19,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 15:06:20,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 15:06:20,022 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 15:06:20,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 15:06:20,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 15:06:20,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:06:20,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:06:20,302 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 25 treesize of output 13 [2023-12-02 15:06:20,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-12-02 15:06:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:20,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:06:20,768 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 49 treesize of output 45 [2023-12-02 15:06:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:20,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576252699] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:06:20,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209859146] [2023-12-02 15:06:20,824 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 15:06:20,825 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:06:20,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:06:20,825 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:06:20,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:06:26,073 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:06:30,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16276#(and (<= 1 |#StackHeapBarrier|) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (or (< (select |#length| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 8 |ULTIMATE.start_inspect_before_~shape#1.offset|)) (< (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|) 0)) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0) (or (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_55| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_46| Int)) (and (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_46|) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_55|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_55|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_46| 4)) |ULTIMATE.start_inspect_before_~shape#1.offset|) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_46| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_55|)) (= |ULTIMATE.start_inspect_before_~shape#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_55|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_46| 4))))) (and (= |ULTIMATE.start_inspect_before_~shape#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= |ULTIMATE.start_main_~data~0#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (not (= |ULTIMATE.start_inspect_before_~shape#1.base| 0)))))' at error location [2023-12-02 15:06:30,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:06:30,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:06:30,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 8] total 27 [2023-12-02 15:06:30,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061130183] [2023-12-02 15:06:30,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:06:30,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 15:06:30,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 15:06:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1979, Unknown=1, NotChecked=0, Total=2162 [2023-12-02 15:06:30,488 INFO L87 Difference]: Start difference. First operand 274 states and 313 transitions. Second operand has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:32,720 INFO L93 Difference]: Finished difference Result 516 states and 578 transitions. [2023-12-02 15:06:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 15:06:32,720 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 15:06:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:32,723 INFO L225 Difference]: With dead ends: 516 [2023-12-02 15:06:32,723 INFO L226 Difference]: Without dead ends: 516 [2023-12-02 15:06:32,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=436, Invalid=3595, Unknown=1, NotChecked=0, Total=4032 [2023-12-02 15:06:32,724 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1141 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:32,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 1623 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 15:06:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-12-02 15:06:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 290. [2023-12-02 15:06:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 197 states have (on average 1.619289340101523) internal successors, (319), 287 states have internal predecessors, (319), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 333 transitions. [2023-12-02 15:06:32,733 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 333 transitions. Word has length 34 [2023-12-02 15:06:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:32,733 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 333 transitions. [2023-12-02 15:06:32,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 333 transitions. [2023-12-02 15:06:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 15:06:32,734 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:32,734 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:06:32,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:06:32,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 15:06:32,935 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:32,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2115664777, now seen corresponding path program 1 times [2023-12-02 15:06:32,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:32,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478576753] [2023-12-02 15:06:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:32,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:32,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:32,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478576753] [2023-12-02 15:06:33,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478576753] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:33,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:06:33,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:06:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201120338] [2023-12-02 15:06:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:33,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:06:33,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:06:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:06:33,001 INFO L87 Difference]: Start difference. First operand 290 states and 333 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:33,181 INFO L93 Difference]: Finished difference Result 381 states and 426 transitions. [2023-12-02 15:06:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:06:33,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-02 15:06:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:33,183 INFO L225 Difference]: With dead ends: 381 [2023-12-02 15:06:33,183 INFO L226 Difference]: Without dead ends: 381 [2023-12-02 15:06:33,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:06:33,184 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 177 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:33,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 688 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:06:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-12-02 15:06:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 290. [2023-12-02 15:06:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 197 states have (on average 1.614213197969543) internal successors, (318), 287 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 332 transitions. [2023-12-02 15:06:33,191 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 332 transitions. Word has length 35 [2023-12-02 15:06:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:33,191 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 332 transitions. [2023-12-02 15:06:33,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 332 transitions. [2023-12-02 15:06:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 15:06:33,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:33,192 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:06:33,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 15:06:33,192 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:33,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1787279674, now seen corresponding path program 1 times [2023-12-02 15:06:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:33,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026949701] [2023-12-02 15:06:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:33,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:33,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026949701] [2023-12-02 15:06:33,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026949701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:06:33,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248636180] [2023-12-02 15:06:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:33,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:06:33,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:06:33,424 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:06:33,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:06:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:33,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 15:06:33,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:06:33,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:06:33,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:06:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:33,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:06:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:33,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248636180] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:06:33,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804573746] [2023-12-02 15:06:33,884 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 15:06:33,884 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:06:33,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:06:33,885 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:06:33,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:06:38,787 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:06:42,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1804573746] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:42,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:06:42,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [7, 5, 4] total 26 [2023-12-02 15:06:42,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648354625] [2023-12-02 15:06:42,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:42,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:06:42,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:42,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:06:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=585, Unknown=1, NotChecked=0, Total=702 [2023-12-02 15:06:42,335 INFO L87 Difference]: Start difference. First operand 290 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:44,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:06:46,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:06:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:06:48,710 INFO L93 Difference]: Finished difference Result 417 states and 466 transitions. [2023-12-02 15:06:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 15:06:48,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 15:06:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:06:48,713 INFO L225 Difference]: With dead ends: 417 [2023-12-02 15:06:48,713 INFO L226 Difference]: Without dead ends: 417 [2023-12-02 15:06:48,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=116, Invalid=585, Unknown=1, NotChecked=0, Total=702 [2023-12-02 15:06:48,714 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 258 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:06:48,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 998 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1346 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2023-12-02 15:06:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-12-02 15:06:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 294. [2023-12-02 15:06:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 201 states have (on average 1.6019900497512438) internal successors, (322), 291 states have internal predecessors, (322), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:06:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 336 transitions. [2023-12-02 15:06:48,720 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 336 transitions. Word has length 34 [2023-12-02 15:06:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:06:48,720 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 336 transitions. [2023-12-02 15:06:48,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:06:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 336 transitions. [2023-12-02 15:06:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 15:06:48,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:06:48,721 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:06:48,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 15:06:48,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:06:48,921 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:06:48,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:06:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash -562930715, now seen corresponding path program 1 times [2023-12-02 15:06:48,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:06:48,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423203395] [2023-12-02 15:06:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:48,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:06:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:49,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:06:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423203395] [2023-12-02 15:06:49,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423203395] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:06:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094075983] [2023-12-02 15:06:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:06:49,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:06:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:06:49,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:06:49,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:06:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:06:49,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:06:49,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:06:49,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:06:49,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:06:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:49,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:06:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:06:49,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094075983] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:06:49,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396585296] [2023-12-02 15:06:49,705 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-12-02 15:06:49,705 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:06:49,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:06:49,706 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:06:49,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:06:54,629 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:06:58,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [396585296] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:06:58,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:06:58,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 6, 5] total 29 [2023-12-02 15:06:58,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269563740] [2023-12-02 15:06:58,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:06:58,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 15:06:58,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:06:58,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 15:06:58,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=734, Unknown=2, NotChecked=0, Total=870 [2023-12-02 15:06:58,692 INFO L87 Difference]: Start difference. First operand 294 states and 336 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:00,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:07:01,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:07:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:07:03,099 INFO L93 Difference]: Finished difference Result 416 states and 464 transitions. [2023-12-02 15:07:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 15:07:03,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-02 15:07:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:07:03,102 INFO L225 Difference]: With dead ends: 416 [2023-12-02 15:07:03,102 INFO L226 Difference]: Without dead ends: 416 [2023-12-02 15:07:03,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=134, Invalid=734, Unknown=2, NotChecked=0, Total=870 [2023-12-02 15:07:03,103 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 268 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:07:03,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 974 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1288 Invalid, 3 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 15:07:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-12-02 15:07:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 299. [2023-12-02 15:07:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 206 states have (on average 1.587378640776699) internal successors, (327), 296 states have internal predecessors, (327), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:07:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 341 transitions. [2023-12-02 15:07:03,111 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 341 transitions. Word has length 38 [2023-12-02 15:07:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:07:03,111 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 341 transitions. [2023-12-02 15:07:03,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 341 transitions. [2023-12-02 15:07:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 15:07:03,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:07:03,112 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-12-02 15:07:03,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 15:07:03,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 15:07:03,313 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:07:03,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:07:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1723710148, now seen corresponding path program 1 times [2023-12-02 15:07:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:07:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360041402] [2023-12-02 15:07:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:03,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:07:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:07:03,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:07:03,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360041402] [2023-12-02 15:07:03,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360041402] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:07:03,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279363821] [2023-12-02 15:07:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:03,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:07:03,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:07:03,466 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:07:03,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:07:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:03,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:07:03,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:07:03,735 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 31 treesize of output 19 [2023-12-02 15:07:03,738 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 25 treesize of output 13 [2023-12-02 15:07:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:07:03,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:07:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:07:03,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279363821] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:07:03,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017720719] [2023-12-02 15:07:03,857 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 15:07:03,857 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:07:03,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:07:03,857 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:07:03,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:07:08,912 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 3 for LOIs [2023-12-02 15:07:08,914 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:07:12,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19962#(<= 1 |#StackHeapBarrier|)' at error location [2023-12-02 15:07:12,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:07:12,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:07:12,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2023-12-02 15:07:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583555643] [2023-12-02 15:07:12,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:07:12,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:07:12,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:07:12,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:07:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=673, Unknown=1, NotChecked=0, Total=812 [2023-12-02 15:07:12,865 INFO L87 Difference]: Start difference. First operand 299 states and 341 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:07:13,232 INFO L93 Difference]: Finished difference Result 297 states and 335 transitions. [2023-12-02 15:07:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:07:13,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-02 15:07:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:07:13,235 INFO L225 Difference]: With dead ends: 297 [2023-12-02 15:07:13,235 INFO L226 Difference]: Without dead ends: 297 [2023-12-02 15:07:13,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=170, Invalid=885, Unknown=1, NotChecked=0, Total=1056 [2023-12-02 15:07:13,236 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 267 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:07:13,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 546 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:07:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-12-02 15:07:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2023-12-02 15:07:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 206 states have (on average 1.5679611650485437) internal successors, (323), 294 states have internal predecessors, (323), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:07:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 335 transitions. [2023-12-02 15:07:13,241 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 335 transitions. Word has length 40 [2023-12-02 15:07:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:07:13,242 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 335 transitions. [2023-12-02 15:07:13,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 335 transitions. [2023-12-02 15:07:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 15:07:13,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:07:13,243 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:07:13,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 15:07:13,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 15:07:13,443 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:07:13,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:07:13,444 INFO L85 PathProgramCache]: Analyzing trace with hash 360380536, now seen corresponding path program 1 times [2023-12-02 15:07:13,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:07:13,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089037651] [2023-12-02 15:07:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:13,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:07:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:07:13,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:07:13,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089037651] [2023-12-02 15:07:13,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089037651] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:07:13,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:07:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:07:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94113878] [2023-12-02 15:07:13,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:07:13,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:07:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:07:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:07:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:07:13,596 INFO L87 Difference]: Start difference. First operand 297 states and 335 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:07:13,932 INFO L93 Difference]: Finished difference Result 326 states and 357 transitions. [2023-12-02 15:07:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:07:13,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-02 15:07:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:07:13,935 INFO L225 Difference]: With dead ends: 326 [2023-12-02 15:07:13,935 INFO L226 Difference]: Without dead ends: 326 [2023-12-02 15:07:13,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:07:13,935 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 134 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:07:13,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1032 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:07:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-12-02 15:07:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 297. [2023-12-02 15:07:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 206 states have (on average 1.5631067961165048) internal successors, (322), 294 states have internal predecessors, (322), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:07:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 334 transitions. [2023-12-02 15:07:13,941 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 334 transitions. Word has length 41 [2023-12-02 15:07:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:07:13,941 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 334 transitions. [2023-12-02 15:07:13,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 334 transitions. [2023-12-02 15:07:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 15:07:13,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:07:13,942 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:07:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-02 15:07:13,942 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:07:13,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:07:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 360289657, now seen corresponding path program 1 times [2023-12-02 15:07:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:07:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950852137] [2023-12-02 15:07:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:13,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:07:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:07:14,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:07:14,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950852137] [2023-12-02 15:07:14,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950852137] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:07:14,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:07:14,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:07:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045644029] [2023-12-02 15:07:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:07:14,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:07:14,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:07:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:07:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:07:14,083 INFO L87 Difference]: Start difference. First operand 297 states and 334 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:07:14,470 INFO L93 Difference]: Finished difference Result 320 states and 357 transitions. [2023-12-02 15:07:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:07:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-02 15:07:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:07:14,473 INFO L225 Difference]: With dead ends: 320 [2023-12-02 15:07:14,473 INFO L226 Difference]: Without dead ends: 320 [2023-12-02 15:07:14,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:07:14,473 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 81 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:07:14,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 789 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:07:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-12-02 15:07:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2023-12-02 15:07:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 213 states have (on average 1.5305164319248827) internal successors, (326), 299 states have internal predecessors, (326), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:07:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 338 transitions. [2023-12-02 15:07:14,480 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 338 transitions. Word has length 41 [2023-12-02 15:07:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:07:14,480 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 338 transitions. [2023-12-02 15:07:14,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 338 transitions. [2023-12-02 15:07:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 15:07:14,481 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:07:14,481 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:07:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-02 15:07:14,481 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:07:14,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:07:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash 360289658, now seen corresponding path program 1 times [2023-12-02 15:07:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:07:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486298687] [2023-12-02 15:07:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:07:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:07:14,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:07:14,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486298687] [2023-12-02 15:07:14,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486298687] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:07:14,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:07:14,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:07:14,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058784727] [2023-12-02 15:07:14,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:07:14,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:07:14,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:07:14,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:07:14,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:07:14,796 INFO L87 Difference]: Start difference. First operand 302 states and 338 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:07:15,374 INFO L93 Difference]: Finished difference Result 365 states and 400 transitions. [2023-12-02 15:07:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:07:15,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-02 15:07:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:07:15,376 INFO L225 Difference]: With dead ends: 365 [2023-12-02 15:07:15,376 INFO L226 Difference]: Without dead ends: 365 [2023-12-02 15:07:15,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:07:15,377 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 260 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:07:15,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 961 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:07:15,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-12-02 15:07:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 305. [2023-12-02 15:07:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 216 states have (on average 1.5231481481481481) internal successors, (329), 302 states have internal predecessors, (329), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:07:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 341 transitions. [2023-12-02 15:07:15,383 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 341 transitions. Word has length 41 [2023-12-02 15:07:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:07:15,384 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 341 transitions. [2023-12-02 15:07:15,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 341 transitions. [2023-12-02 15:07:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 15:07:15,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:07:15,385 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:07:15,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-02 15:07:15,385 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:07:15,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:07:15,385 INFO L85 PathProgramCache]: Analyzing trace with hash 266358949, now seen corresponding path program 1 times [2023-12-02 15:07:15,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:07:15,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501085943] [2023-12-02 15:07:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:15,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:07:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:07:15,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:07:15,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501085943] [2023-12-02 15:07:15,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501085943] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:07:15,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:07:15,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:07:15,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213632245] [2023-12-02 15:07:15,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:07:15,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:07:15,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:07:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:07:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:07:15,610 INFO L87 Difference]: Start difference. First operand 305 states and 341 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:07:16,068 INFO L93 Difference]: Finished difference Result 325 states and 361 transitions. [2023-12-02 15:07:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:07:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-02 15:07:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:07:16,070 INFO L225 Difference]: With dead ends: 325 [2023-12-02 15:07:16,070 INFO L226 Difference]: Without dead ends: 325 [2023-12-02 15:07:16,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:07:16,071 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 66 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:07:16,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1210 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:07:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-12-02 15:07:16,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2023-12-02 15:07:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 215 states have (on average 1.5209302325581395) internal successors, (327), 301 states have internal predecessors, (327), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:07:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 339 transitions. [2023-12-02 15:07:16,077 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 339 transitions. Word has length 44 [2023-12-02 15:07:16,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:07:16,078 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 339 transitions. [2023-12-02 15:07:16,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:16,078 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 339 transitions. [2023-12-02 15:07:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 15:07:16,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:07:16,078 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:07:16,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 15:07:16,079 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:07:16,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:07:16,079 INFO L85 PathProgramCache]: Analyzing trace with hash 506697450, now seen corresponding path program 1 times [2023-12-02 15:07:16,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:07:16,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396760100] [2023-12-02 15:07:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:16,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:07:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:07:17,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:07:17,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396760100] [2023-12-02 15:07:17,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396760100] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:07:17,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363118279] [2023-12-02 15:07:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:17,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:07:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:07:17,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:07:17,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:07:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:17,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-02 15:07:17,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:07:17,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:07:17,418 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 15:07:17,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-02 15:07:17,453 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 15 treesize of output 1 [2023-12-02 15:07:17,468 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 25 treesize of output 13 [2023-12-02 15:07:17,516 INFO L349 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2023-12-02 15:07:17,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 41 [2023-12-02 15:07:17,589 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 26 treesize of output 19 [2023-12-02 15:07:17,616 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 26 treesize of output 19 [2023-12-02 15:07:17,671 INFO L349 Elim1Store]: treesize reduction 84, result has 30.0 percent of original size [2023-12-02 15:07:17,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 48 [2023-12-02 15:07:17,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2023-12-02 15:07:17,816 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 15:07:17,816 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 1 case distinctions, treesize of input 86 treesize of output 49 [2023-12-02 15:07:17,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:07:18,594 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 7 treesize of output 3 [2023-12-02 15:07:19,069 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 15:07:19,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 42 [2023-12-02 15:07:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:07:19,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:07:20,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:20,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 51 [2023-12-02 15:07:20,112 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:07:20,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:20,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 212 [2023-12-02 15:07:20,134 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 41 treesize of output 39 [2023-12-02 15:07:20,195 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 25 treesize of output 21 [2023-12-02 15:07:20,208 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 243 treesize of output 235 [2023-12-02 15:07:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:07:27,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363118279] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:07:27,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522516866] [2023-12-02 15:07:27,010 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-12-02 15:07:27,010 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:07:27,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:07:27,011 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:07:27,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:07:32,144 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:07:38,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23513#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1) (= |ULTIMATE.start_inspect_before_#t~mem29#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (= |ULTIMATE.start_inspect_before_#t~mem29#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|)) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|)) 0) (or (not (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|)) (not (= |ULTIMATE.start_inspect_before_~shape#1.base| 0))) (not (= (select |#valid| |ULTIMATE.start_inspect_before_#t~mem29#1.base|) 1)) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0) (<= (+ 8 |ULTIMATE.start_inspect_before_~shape#1.offset|) (select |#length| |ULTIMATE.start_inspect_before_~shape#1.base|)))' at error location [2023-12-02 15:07:38,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:07:38,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:07:38,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 41 [2023-12-02 15:07:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887514602] [2023-12-02 15:07:38,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:07:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 15:07:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:07:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 15:07:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=4077, Unknown=6, NotChecked=0, Total=4422 [2023-12-02 15:07:38,038 INFO L87 Difference]: Start difference. First operand 304 states and 339 transitions. Second operand has 42 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:07:43,733 INFO L93 Difference]: Finished difference Result 409 states and 443 transitions. [2023-12-02 15:07:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 15:07:43,734 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-02 15:07:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:07:43,736 INFO L225 Difference]: With dead ends: 409 [2023-12-02 15:07:43,736 INFO L226 Difference]: Without dead ends: 409 [2023-12-02 15:07:43,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=695, Invalid=7131, Unknown=6, NotChecked=0, Total=7832 [2023-12-02 15:07:43,739 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 869 mSDsluCounter, 3178 mSDsCounter, 0 mSdLazyCounter, 3243 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:07:43,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 3376 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3243 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-02 15:07:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-12-02 15:07:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 305. [2023-12-02 15:07:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 216 states have (on average 1.5231481481481481) internal successors, (329), 302 states have internal predecessors, (329), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:07:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 341 transitions. [2023-12-02 15:07:43,744 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 341 transitions. Word has length 45 [2023-12-02 15:07:43,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:07:43,744 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 341 transitions. [2023-12-02 15:07:43,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 42 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:07:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 341 transitions. [2023-12-02 15:07:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 15:07:43,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:07:43,745 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:07:43,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:07:43,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 15:07:43,946 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:07:43,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:07:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 506697451, now seen corresponding path program 1 times [2023-12-02 15:07:43,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:07:43,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064550352] [2023-12-02 15:07:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:43,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:07:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:07:45,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:07:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064550352] [2023-12-02 15:07:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064550352] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:07:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133725165] [2023-12-02 15:07:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:07:45,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:07:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:07:45,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:07:45,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:07:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:07:45,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-02 15:07:45,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:07:45,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:07:45,379 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:07:45,379 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 14 treesize of output 13 [2023-12-02 15:07:45,403 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:07:45,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 15:07:45,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:07:45,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:07:45,516 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 42 treesize of output 22 [2023-12-02 15:07:45,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 15:07:45,624 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2023-12-02 15:07:45,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2023-12-02 15:07:45,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 15:07:45,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:07:45,706 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 43 treesize of output 32 [2023-12-02 15:07:45,729 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 43 treesize of output 32 [2023-12-02 15:07:45,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:07:45,747 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-02 15:07:45,747 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 1 case distinctions, treesize of input 18 treesize of output 21 [2023-12-02 15:07:45,766 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-12-02 15:07:45,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-12-02 15:07:45,817 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 34 treesize of output 25 [2023-12-02 15:07:45,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:07:45,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 15:07:45,854 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 57 treesize of output 29 [2023-12-02 15:07:46,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:46,709 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 31 [2023-12-02 15:07:46,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 15:07:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:07:46,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:07:47,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:47,402 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2023-12-02 15:07:47,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:47,407 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2023-12-02 15:07:47,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:47,420 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2023-12-02 15:07:48,833 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:07:48,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:48,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2023-12-02 15:07:48,848 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 192 treesize of output 184 [2023-12-02 15:07:48,857 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:07:48,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:48,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 146 [2023-12-02 15:07:48,875 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 862 treesize of output 826 [2023-12-02 15:07:48,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:48,895 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 100 treesize of output 102 [2023-12-02 15:07:48,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:48,908 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 96 treesize of output 98 [2023-12-02 15:07:48,916 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 44 treesize of output 42 [2023-12-02 15:07:48,922 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 42 treesize of output 40 [2023-12-02 15:07:49,419 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:07:49,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:49,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-12-02 15:07:49,430 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 138 treesize of output 126 [2023-12-02 15:07:49,437 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 23 treesize of output 21 [2023-12-02 15:07:49,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:49,448 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 31 treesize of output 33 [2023-12-02 15:07:50,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:07:50,166 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 3245 treesize of output 3201 [2023-12-02 15:07:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:07:55,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133725165] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:07:55,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588248862] [2023-12-02 15:07:55,685 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-12-02 15:07:55,685 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:07:55,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:07:55,685 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:07:55,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:08:00,732 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:08:07,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24602#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1) (= |ULTIMATE.start_inspect_before_#t~mem29#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (= |ULTIMATE.start_inspect_before_#t~mem29#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|)) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|)) 0) (or (not (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|)) (not (= |ULTIMATE.start_inspect_before_~shape#1.base| 0))) (or (< (select |#length| |ULTIMATE.start_inspect_before_#t~mem29#1.base|) (+ |ULTIMATE.start_inspect_before_#t~mem29#1.offset| 4)) (< |ULTIMATE.start_inspect_before_#t~mem29#1.offset| 0)) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0) (<= (+ 8 |ULTIMATE.start_inspect_before_~shape#1.offset|) (select |#length| |ULTIMATE.start_inspect_before_~shape#1.base|)))' at error location [2023-12-02 15:08:07,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:08:07,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:08:07,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 14] total 39 [2023-12-02 15:08:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569416991] [2023-12-02 15:08:07,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:08:07,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 15:08:07,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 15:08:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=3886, Unknown=3, NotChecked=0, Total=4160 [2023-12-02 15:08:07,214 INFO L87 Difference]: Start difference. First operand 305 states and 341 transitions. Second operand has 40 states, 39 states have (on average 3.358974358974359) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:08:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:15,911 INFO L93 Difference]: Finished difference Result 396 states and 430 transitions. [2023-12-02 15:08:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 15:08:15,911 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.358974358974359) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-02 15:08:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:15,914 INFO L225 Difference]: With dead ends: 396 [2023-12-02 15:08:15,914 INFO L226 Difference]: Without dead ends: 396 [2023-12-02 15:08:15,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=607, Invalid=6530, Unknown=3, NotChecked=0, Total=7140 [2023-12-02 15:08:15,917 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1072 mSDsluCounter, 2830 mSDsCounter, 0 mSdLazyCounter, 3587 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 3619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:15,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 3023 Invalid, 3619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3587 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-12-02 15:08:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-12-02 15:08:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2023-12-02 15:08:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 216 states have (on average 1.5185185185185186) internal successors, (328), 302 states have internal predecessors, (328), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:08:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 340 transitions. [2023-12-02 15:08:15,924 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 340 transitions. Word has length 45 [2023-12-02 15:08:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:15,924 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 340 transitions. [2023-12-02 15:08:15,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.358974358974359) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:08:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 340 transitions. [2023-12-02 15:08:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 15:08:15,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:15,925 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:08:15,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 15:08:16,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 15:08:16,126 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:08:16,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1465586669, now seen corresponding path program 1 times [2023-12-02 15:08:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854198800] [2023-12-02 15:08:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:16,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:16,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:16,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854198800] [2023-12-02 15:08:16,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854198800] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:08:16,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292637114] [2023-12-02 15:08:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:16,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:08:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:08:16,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:08:16,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:08:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:16,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 15:08:16,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:08:16,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:08:16,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:08:16,954 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 24 treesize of output 12 [2023-12-02 15:08:16,978 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 15:08:16,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 15:08:17,007 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 17 treesize of output 12 [2023-12-02 15:08:17,025 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 15:08:17,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 15:08:17,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-12-02 15:08:17,066 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 17 treesize of output 12 [2023-12-02 15:08:17,081 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 28 treesize of output 16 [2023-12-02 15:08:17,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:08:17,287 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 7 treesize of output 3 [2023-12-02 15:08:17,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:17,402 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-12-02 15:08:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:17,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:08:17,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:17,604 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2023-12-02 15:08:17,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:17,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2023-12-02 15:08:17,883 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 131 treesize of output 119 [2023-12-02 15:08:17,890 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 52 treesize of output 50 [2023-12-02 15:08:17,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:17,898 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 57 treesize of output 59 [2023-12-02 15:08:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292637114] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:08:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732282332] [2023-12-02 15:08:18,126 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-12-02 15:08:18,126 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:08:18,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:08:18,127 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:08:18,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:08:23,196 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 37 for LOIs [2023-12-02 15:08:23,208 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:08:28,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25671#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| Int)) (and (or (not (= |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2| 0)) (not (= |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| 0))) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2|) 0) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| 4)) 0) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2|) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2|) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| 4)) 0))))' at error location [2023-12-02 15:08:28,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:08:28,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:08:28,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 14] total 31 [2023-12-02 15:08:28,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523298460] [2023-12-02 15:08:28,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:08:28,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 15:08:28,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 15:08:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2749, Unknown=3, NotChecked=0, Total=2970 [2023-12-02 15:08:28,311 INFO L87 Difference]: Start difference. First operand 305 states and 340 transitions. Second operand has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:08:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:30,721 INFO L93 Difference]: Finished difference Result 395 states and 428 transitions. [2023-12-02 15:08:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 15:08:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-02 15:08:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:30,724 INFO L225 Difference]: With dead ends: 395 [2023-12-02 15:08:30,724 INFO L226 Difference]: Without dead ends: 395 [2023-12-02 15:08:30,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=418, Invalid=4409, Unknown=3, NotChecked=0, Total=4830 [2023-12-02 15:08:30,726 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 691 mSDsluCounter, 3315 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 3519 SdHoareTripleChecker+Invalid, 2441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:30,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 3519 Invalid, 2441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 15:08:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-12-02 15:08:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 305. [2023-12-02 15:08:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 216 states have (on average 1.5138888888888888) internal successors, (327), 302 states have internal predecessors, (327), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:08:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 339 transitions. [2023-12-02 15:08:30,730 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 339 transitions. Word has length 46 [2023-12-02 15:08:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:30,730 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 339 transitions. [2023-12-02 15:08:30,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:08:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 339 transitions. [2023-12-02 15:08:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 15:08:30,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:30,731 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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] [2023-12-02 15:08:30,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:08:30,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 15:08:30,932 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:08:30,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash -989571034, now seen corresponding path program 1 times [2023-12-02 15:08:30,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:30,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724763058] [2023-12-02 15:08:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:30,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:31,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:31,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724763058] [2023-12-02 15:08:31,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724763058] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:08:31,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493792759] [2023-12-02 15:08:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:31,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:08:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:08:31,562 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:08:31,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:08:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:31,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-02 15:08:31,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:08:31,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:08:31,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:08:31,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:08:31,846 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 15:08:31,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 15:08:31,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:31,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:31,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:31,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:31,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 15:08:31,981 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:08:31,982 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 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 15:08:32,038 INFO L349 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-12-02 15:08:32,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 31 treesize of output 38 [2023-12-02 15:08:32,058 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-12-02 15:08:32,058 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 2 case distinctions, treesize of input 47 treesize of output 42 [2023-12-02 15:08:32,798 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2023-12-02 15:08:32,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 136 [2023-12-02 15:08:33,457 INFO L349 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-12-02 15:08:33,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 28 [2023-12-02 15:08:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:33,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:08:34,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:34,104 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 15:08:34,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:34,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 15:08:34,673 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 70 treesize of output 58 [2023-12-02 15:08:34,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:34,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2023-12-02 15:08:34,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:34,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 235 [2023-12-02 15:08:34,715 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 214 treesize of output 206 [2023-12-02 15:08:34,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:34,734 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 60 treesize of output 58 [2023-12-02 15:08:34,754 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 [2023-12-02 15:08:34,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 78 [2023-12-02 15:08:34,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:34,958 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 62 [2023-12-02 15:08:34,961 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:08:34,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:34,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 152 [2023-12-02 15:08:34,975 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:08:34,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 138 [2023-12-02 15:08:35,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 114 [2023-12-02 15:08:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:35,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493792759] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:08:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131884091] [2023-12-02 15:08:35,258 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 15:08:35,258 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:08:35,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:08:35,259 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:08:35,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:08:40,352 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 26 for LOIs [2023-12-02 15:08:40,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:08:45,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26733#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3|) 0) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3|) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3|) 0) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3| 4) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3|)))))' at error location [2023-12-02 15:08:45,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:08:45,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:08:45,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 37 [2023-12-02 15:08:45,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364774378] [2023-12-02 15:08:45,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:08:45,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 15:08:45,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:08:45,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 15:08:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2980, Unknown=4, NotChecked=0, Total=3192 [2023-12-02 15:08:45,575 INFO L87 Difference]: Start difference. First operand 305 states and 339 transitions. Second operand has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 37 states have internal predecessors, (123), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:08:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:08:50,807 INFO L93 Difference]: Finished difference Result 568 states and 613 transitions. [2023-12-02 15:08:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-02 15:08:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 37 states have internal predecessors, (123), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-02 15:08:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:08:50,811 INFO L225 Difference]: With dead ends: 568 [2023-12-02 15:08:50,811 INFO L226 Difference]: Without dead ends: 568 [2023-12-02 15:08:50,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=736, Invalid=7092, Unknown=4, NotChecked=0, Total=7832 [2023-12-02 15:08:50,814 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1696 mSDsluCounter, 3640 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 3850 SdHoareTripleChecker+Invalid, 2846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:08:50,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1696 Valid, 3850 Invalid, 2846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 15:08:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2023-12-02 15:08:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 355. [2023-12-02 15:08:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 266 states have (on average 1.4548872180451127) internal successors, (387), 352 states have internal predecessors, (387), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:08:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 399 transitions. [2023-12-02 15:08:50,820 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 399 transitions. Word has length 46 [2023-12-02 15:08:50,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:08:50,820 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 399 transitions. [2023-12-02 15:08:50,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 37 states have internal predecessors, (123), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:08:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 399 transitions. [2023-12-02 15:08:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 15:08:50,820 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:08:50,820 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:08:50,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:08:51,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 15:08:51,021 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:08:51,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:08:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1694779252, now seen corresponding path program 1 times [2023-12-02 15:08:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:08:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12688602] [2023-12-02 15:08:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:08:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:51,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:08:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12688602] [2023-12-02 15:08:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12688602] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:08:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31992442] [2023-12-02 15:08:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:08:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:08:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:08:51,806 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:08:51,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:08:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:08:51,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-02 15:08:51,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:08:51,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:08:52,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:08:52,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:08:52,105 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:08:52,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 15:08:52,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:52,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:52,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:52,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:52,194 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 15:08:52,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 15:08:52,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:52,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:08:52,254 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 27 treesize of output 15 [2023-12-02 15:08:52,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 15:08:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:52,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:08:53,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:53,270 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 15:08:53,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:53,279 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 15:08:53,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:53,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 15:08:53,770 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 140 treesize of output 122 [2023-12-02 15:08:53,777 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 25 treesize of output 21 [2023-12-02 15:08:53,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:53,788 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 35 treesize of output 33 [2023-12-02 15:08:53,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:53,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 15:08:53,883 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 70 treesize of output 58 [2023-12-02 15:08:53,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:08:53,895 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 60 treesize of output 58 [2023-12-02 15:08:53,902 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 [2023-12-02 15:08:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:08:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31992442] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:08:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868751620] [2023-12-02 15:08:54,289 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 15:08:54,289 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:08:54,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:08:54,290 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:08:54,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:08:59,347 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:09:04,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28045#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1) (<= (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|) (select |#length| |ULTIMATE.start_inspect_before_~shape#1.base|)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) |ULTIMATE.start_inspect_before_#t~mem24#1.offset|) (not (= (select |#valid| |ULTIMATE.start_inspect_before_#t~mem24#1.base|) 1)) (= |ULTIMATE.start_inspect_before_#t~mem24#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0))' at error location [2023-12-02 15:09:04,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:09:04,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:09:04,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 13] total 38 [2023-12-02 15:09:04,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937023270] [2023-12-02 15:09:04,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:09:04,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 15:09:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:09:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 15:09:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2996, Unknown=4, NotChecked=0, Total=3192 [2023-12-02 15:09:04,369 INFO L87 Difference]: Start difference. First operand 355 states and 399 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:09:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:09:08,643 INFO L93 Difference]: Finished difference Result 497 states and 537 transitions. [2023-12-02 15:09:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 15:09:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-02 15:09:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:09:08,646 INFO L225 Difference]: With dead ends: 497 [2023-12-02 15:09:08,646 INFO L226 Difference]: Without dead ends: 493 [2023-12-02 15:09:08,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=505, Invalid=6463, Unknown=4, NotChecked=0, Total=6972 [2023-12-02 15:09:08,647 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 1042 mSDsluCounter, 4356 mSDsCounter, 0 mSdLazyCounter, 3774 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 4556 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:09:08,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 4556 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3774 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 15:09:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-12-02 15:09:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 332. [2023-12-02 15:09:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 243 states have (on average 1.4650205761316872) internal successors, (356), 329 states have internal predecessors, (356), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:09:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 368 transitions. [2023-12-02 15:09:08,652 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 368 transitions. Word has length 45 [2023-12-02 15:09:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:09:08,652 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 368 transitions. [2023-12-02 15:09:08,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:09:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 368 transitions. [2023-12-02 15:09:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 15:09:08,653 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:09:08,653 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:09:08,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 15:09:08,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:09:08,854 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:09:08,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:09:08,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1950178066, now seen corresponding path program 1 times [2023-12-02 15:09:08,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:09:08,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450379367] [2023-12-02 15:09:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:08,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:09:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:09:08,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:09:08,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450379367] [2023-12-02 15:09:08,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450379367] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:09:08,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:09:08,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:09:08,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166642801] [2023-12-02 15:09:08,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:09:08,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:09:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:09:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:09:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:09:08,924 INFO L87 Difference]: Start difference. First operand 332 states and 368 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:09:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:09:09,089 INFO L93 Difference]: Finished difference Result 331 states and 365 transitions. [2023-12-02 15:09:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:09:09,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-12-02 15:09:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:09:09,091 INFO L225 Difference]: With dead ends: 331 [2023-12-02 15:09:09,092 INFO L226 Difference]: Without dead ends: 331 [2023-12-02 15:09:09,092 INFO L412 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 [2023-12-02 15:09:09,092 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 4 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:09:09,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 663 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:09:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-12-02 15:09:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2023-12-02 15:09:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 243 states have (on average 1.4567901234567902) internal successors, (354), 328 states have internal predecessors, (354), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:09:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 365 transitions. [2023-12-02 15:09:09,097 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 365 transitions. Word has length 48 [2023-12-02 15:09:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:09:09,097 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 365 transitions. [2023-12-02 15:09:09,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:09:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 365 transitions. [2023-12-02 15:09:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 15:09:09,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:09:09,098 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:09:09,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-12-02 15:09:09,098 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:09:09,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:09:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1569142432, now seen corresponding path program 1 times [2023-12-02 15:09:09,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:09:09,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842919234] [2023-12-02 15:09:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:09,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:09:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:09:11,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:09:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842919234] [2023-12-02 15:09:11,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842919234] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:09:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166889868] [2023-12-02 15:09:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:11,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:09:11,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:09:11,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:09:11,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:09:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:11,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-02 15:09:11,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:09:11,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:09:11,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:09:11,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:09:11,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 15:09:11,275 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:09:11,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 15:09:11,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 15:09:11,338 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 27 treesize of output 15 [2023-12-02 15:09:11,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 15:09:11,371 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:09:11,372 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 37 [2023-12-02 15:09:11,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-12-02 15:09:11,482 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-12-02 15:09:11,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-12-02 15:09:11,582 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-12-02 15:09:11,582 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 49 [2023-12-02 15:09:11,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-12-02 15:09:11,628 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-12-02 15:09:11,628 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 49 [2023-12-02 15:09:11,651 INFO L349 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2023-12-02 15:09:11,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2023-12-02 15:09:11,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-12-02 15:09:11,737 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-12-02 15:09:11,738 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 42 [2023-12-02 15:09:11,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-12-02 15:09:11,827 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 15:09:11,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 44 [2023-12-02 15:09:11,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 50 [2023-12-02 15:09:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:09:12,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:09:13,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:13,344 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 53 [2023-12-02 15:09:13,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:13,354 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2023-12-02 15:09:23,226 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,228 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,232 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 320 treesize of output 318 [2023-12-02 15:09:23,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,239 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:23,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11260 treesize of output 11204 [2023-12-02 15:09:23,290 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 118 treesize of output 114 [2023-12-02 15:09:23,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:23,300 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 157 treesize of output 145 [2023-12-02 15:09:23,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:23,503 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 1 case distinctions, treesize of input 16 treesize of output 6 [2023-12-02 15:09:23,505 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 6 treesize of output 4 [2023-12-02 15:09:23,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,511 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,512 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,522 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,571 INFO L349 Elim1Store]: treesize reduction 96, result has 33.3 percent of original size [2023-12-02 15:09:23,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 58555 treesize of output 56549 [2023-12-02 15:09:23,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:23,660 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 1304 treesize of output 1302 [2023-12-02 15:09:23,682 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 174 treesize of output 170 [2023-12-02 15:09:23,687 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 213 treesize of output 201 [2023-12-02 15:09:23,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:23,760 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 1 case distinctions, treesize of input 16 treesize of output 6 [2023-12-02 15:09:23,762 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 6 treesize of output 4 [2023-12-02 15:09:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:09:26,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166889868] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:09:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [592303302] [2023-12-02 15:09:26,156 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-12-02 15:09:26,156 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:09:26,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:09:26,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:09:26,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:09:31,226 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 55 for LOIs [2023-12-02 15:09:31,246 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:09:36,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29955#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| Int)) (and (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) 1) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|)) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) 1) (or (not (= |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4| 0)) (not (= |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| 0))) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| 4)) 0) (or (not (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) 0)) (not (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) 0))) (<= (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|) 4) (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|))) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| 4)) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|) 0))))))' at error location [2023-12-02 15:09:36,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:09:36,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:09:36,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 16] total 42 [2023-12-02 15:09:36,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57622109] [2023-12-02 15:09:36,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:09:36,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 15:09:36,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:09:36,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 15:09:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=4386, Unknown=13, NotChecked=0, Total=4692 [2023-12-02 15:09:36,738 INFO L87 Difference]: Start difference. First operand 331 states and 365 transitions. Second operand has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:09:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:09:45,863 INFO L93 Difference]: Finished difference Result 414 states and 444 transitions. [2023-12-02 15:09:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 15:09:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-02 15:09:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:09:45,866 INFO L225 Difference]: With dead ends: 414 [2023-12-02 15:09:45,866 INFO L226 Difference]: Without dead ends: 414 [2023-12-02 15:09:45,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=649, Invalid=7348, Unknown=13, NotChecked=0, Total=8010 [2023-12-02 15:09:45,867 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 881 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 3661 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 4763 SdHoareTripleChecker+Invalid, 3671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:09:45,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 4763 Invalid, 3671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3661 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-12-02 15:09:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-12-02 15:09:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 332. [2023-12-02 15:09:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 244 states have (on average 1.4549180327868851) internal successors, (355), 329 states have internal predecessors, (355), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:09:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 366 transitions. [2023-12-02 15:09:45,874 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 366 transitions. Word has length 50 [2023-12-02 15:09:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:09:45,874 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 366 transitions. [2023-12-02 15:09:45,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:09:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 366 transitions. [2023-12-02 15:09:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 15:09:45,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:09:45,875 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:09:45,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 15:09:46,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-02 15:09:46,076 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:09:46,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:09:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash -289628792, now seen corresponding path program 1 times [2023-12-02 15:09:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:09:46,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474488608] [2023-12-02 15:09:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:46,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:09:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:09:46,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:09:46,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474488608] [2023-12-02 15:09:46,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474488608] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:09:46,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:09:46,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:09:46,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530047067] [2023-12-02 15:09:46,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:09:46,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:09:46,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:09:46,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:09:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:09:46,142 INFO L87 Difference]: Start difference. First operand 332 states and 366 transitions. Second operand has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:09:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:09:46,291 INFO L93 Difference]: Finished difference Result 405 states and 444 transitions. [2023-12-02 15:09:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:09:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-02 15:09:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:09:46,294 INFO L225 Difference]: With dead ends: 405 [2023-12-02 15:09:46,294 INFO L226 Difference]: Without dead ends: 405 [2023-12-02 15:09:46,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:09:46,294 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 125 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:09:46,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 453 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:09:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-12-02 15:09:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 333. [2023-12-02 15:09:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 245 states have (on average 1.453061224489796) internal successors, (356), 330 states have internal predecessors, (356), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:09:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 367 transitions. [2023-12-02 15:09:46,299 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 367 transitions. Word has length 49 [2023-12-02 15:09:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:09:46,300 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 367 transitions. [2023-12-02 15:09:46,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:09:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 367 transitions. [2023-12-02 15:09:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 15:09:46,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:09:46,300 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:09:46,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-12-02 15:09:46,300 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:09:46,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:09:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1193031536, now seen corresponding path program 1 times [2023-12-02 15:09:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:09:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569696358] [2023-12-02 15:09:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:09:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:09:47,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:09:47,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569696358] [2023-12-02 15:09:47,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569696358] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:09:47,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512637570] [2023-12-02 15:09:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:09:47,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:09:47,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:09:47,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:09:47,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:09:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:09:47,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 15:09:47,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:09:47,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:09:47,837 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:09:47,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 15:09:47,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 15:09:47,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:09:47,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:09:47,960 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 42 treesize of output 22 [2023-12-02 15:09:47,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 15:09:48,064 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-12-02 15:09:48,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-12-02 15:09:48,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 15:09:48,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:09:48,160 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 43 treesize of output 32 [2023-12-02 15:09:48,194 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 43 treesize of output 32 [2023-12-02 15:09:48,214 INFO L349 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2023-12-02 15:09:48,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2023-12-02 15:09:48,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:09:48,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 15:09:48,273 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 34 treesize of output 25 [2023-12-02 15:09:48,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 15:09:48,296 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 57 treesize of output 29 [2023-12-02 15:09:48,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 15:09:49,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:49,064 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 31 [2023-12-02 15:09:49,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 15:09:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:09:49,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:09:49,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:49,573 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2023-12-02 15:09:49,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:49,582 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2023-12-02 15:09:49,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:49,587 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2023-12-02 15:09:50,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:50,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:50,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-12-02 15:09:50,425 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 138 treesize of output 126 [2023-12-02 15:09:50,432 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 23 treesize of output 21 [2023-12-02 15:09:50,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:50,441 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 31 treesize of output 33 [2023-12-02 15:09:50,515 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:50,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:50,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2023-12-02 15:09:50,530 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 192 treesize of output 184 [2023-12-02 15:09:50,539 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:09:50,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:50,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 146 [2023-12-02 15:09:50,555 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 430 treesize of output 410 [2023-12-02 15:09:50,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:50,570 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 100 treesize of output 102 [2023-12-02 15:09:50,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:50,581 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 96 treesize of output 98 [2023-12-02 15:09:50,589 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 44 treesize of output 42 [2023-12-02 15:09:50,595 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 42 treesize of output 40 [2023-12-02 15:09:51,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:09:51,278 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 2877 treesize of output 2839 [2023-12-02 15:09:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:09:55,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512637570] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:09:55,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361225224] [2023-12-02 15:09:55,975 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 15:09:55,975 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:09:55,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:09:55,976 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:09:55,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:10:01,035 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:10:01,549 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse1 (= 0 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse0 (= |c_ULTIMATE.start_main_~node~1#1.offset| 0)) (.cse2 (<= 1 |c_#StackHeapBarrier|)) (.cse3 (= |c_ULTIMATE.start_main_~data~0#1.offset| 0)) (.cse4 (= |c_ULTIMATE.start_main_~item~0#1.offset| 0))) (and (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse2 .cse3 .cse4)) (let ((.cse12 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~node~1#1.base|) 4))) (let ((.cse5 (<= 0 (+ .cse12 2147483648))) (.cse6 (<= .cse12 2147483647)) (.cse15 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base|) 4)) (.cse8 (<= (+ |c_ULTIMATE.start_main_~node~1#1.base| 1) |c_#StackHeapBarrier|)) (.cse9 (not (= |c_ULTIMATE.start_main_~item~0#1.base| 0))) (.cse10 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base|) 4)) (.cse14 (<= (+ |c_ULTIMATE.start_main_~item~0#1.base| 1) |c_#StackHeapBarrier|)) (.cse16 (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0)))) (or (let ((.cse7 (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_~node~1#1.base| 1))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_~node~1#1.base|) 0) .cse5 .cse6 (= |c_#valid| (store .cse7 |c_ULTIMATE.start_main_~item~0#1.base| 1)) (= (select .cse7 |c_ULTIMATE.start_main_~item~0#1.base|) 0) .cse0 .cse1 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0) .cse8 .cse2 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1) .cse3 .cse9 (exists ((|v_#memory_$Pointer$.base_431| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_431| |c_ULTIMATE.start_main_~node~1#1.base| (store (store (select |v_#memory_$Pointer$.base_431| |c_ULTIMATE.start_main_~node~1#1.base|) 0 0) 4 .cse10)))) (exists ((|v_#memory_int_333| (Array Int (Array Int Int))) (|v_#memory_int_332| (Array Int (Array Int Int)))) (let ((.cse11 (select |v_#memory_int_333| |c_ULTIMATE.start_main_~node~1#1.base|)) (.cse13 (select |v_#memory_int_332| 1))) (and (= (store |v_#memory_int_332| |c_ULTIMATE.start_main_~node~1#1.base| (store (select |v_#memory_int_332| |c_ULTIMATE.start_main_~node~1#1.base|) 0 (select .cse11 0))) |v_#memory_int_333|) (= (store |v_#memory_int_333| |c_ULTIMATE.start_main_~node~1#1.base| (store .cse11 4 .cse12)) |c_#memory_int|) (= (select .cse13 1) 0) (= (select .cse13 0) 48)))) .cse4 .cse14 (exists ((|v_#length_316| (Array Int Int))) (and (= |c_#length| (store (store |v_#length_316| |c_ULTIMATE.start_main_~node~1#1.base| 8) |c_ULTIMATE.start_main_~item~0#1.base| 8)) (= (select |v_#length_316| 2) 15) (= (select |v_#length_316| 1) 2))) (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1) (exists ((|v_ULTIMATE.start_main_#t~nondet37#1_102| Int)) (and (not (= |v_ULTIMATE.start_main_#t~nondet37#1_102| 0)) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet37#1_102| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet37#1_102| 2147483647))) (exists ((|v_#memory_$Pointer$.offset_419| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_419| |c_ULTIMATE.start_main_~node~1#1.base| (store (store (select |v_#memory_$Pointer$.offset_419| |c_ULTIMATE.start_main_~node~1#1.base|) 0 0) 4 .cse15)) |c_#memory_$Pointer$.offset|)) .cse16)) (and .cse5 .cse6 (exists ((|v_#memory_$Pointer$.offset_431| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_431| |c_ULTIMATE.start_main_~node~1#1.base| (store (store (select |v_#memory_$Pointer$.offset_431| |c_ULTIMATE.start_main_~node~1#1.base|) 0 0) 4 .cse15)))) .cse0 .cse8 .cse2 (exists ((|v_ULTIMATE.start_main_#t~nondet37#1_106| Int)) (and (not (= |v_ULTIMATE.start_main_#t~nondet37#1_106| 0)) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet37#1_106| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet37#1_106| 2147483647))) .cse3 (exists ((|v_#length_322| (Array Int Int))) (= (store (store |v_#length_322| |c_ULTIMATE.start_main_~node~1#1.base| 8) |c_ULTIMATE.start_main_~item~0#1.base| 8) |c_#length|)) .cse9 .cse4 (exists ((|v_#memory_int_345| (Array Int (Array Int Int))) (|v_#memory_int_344| (Array Int (Array Int Int)))) (let ((.cse17 (select |v_#memory_int_345| |c_ULTIMATE.start_main_~node~1#1.base|))) (and (= (store |v_#memory_int_344| |c_ULTIMATE.start_main_~node~1#1.base| (store (select |v_#memory_int_344| |c_ULTIMATE.start_main_~node~1#1.base|) 0 (select .cse17 0))) |v_#memory_int_345|) (= (store |v_#memory_int_345| |c_ULTIMATE.start_main_~node~1#1.base| (store .cse17 4 .cse12)) |c_#memory_int|)))) (exists ((|v_#memory_$Pointer$.base_443| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_443| |c_ULTIMATE.start_main_~node~1#1.base| (store (store (select |v_#memory_$Pointer$.base_443| |c_ULTIMATE.start_main_~node~1#1.base|) 0 0) 4 .cse10)))) .cse14 (exists ((|v_#valid_359| (Array Int Int))) (let ((.cse18 (store |v_#valid_359| |c_ULTIMATE.start_main_~node~1#1.base| 1))) (and (= (select |v_#valid_359| |c_ULTIMATE.start_main_~node~1#1.base|) 0) (= (select .cse18 |c_ULTIMATE.start_main_~item~0#1.base|) 0) (= |c_#valid| (store .cse18 |c_ULTIMATE.start_main_~item~0#1.base| 1))))) .cse16)))))) is different from true [2023-12-02 15:10:03,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31854#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1) (<= (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|) (select |#length| |ULTIMATE.start_inspect_before_~shape#1.base|)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (or (< |ULTIMATE.start_inspect_before_#t~mem24#1.offset| 0) (< (select |#length| |ULTIMATE.start_inspect_before_#t~mem24#1.base|) (+ |ULTIMATE.start_inspect_before_#t~mem24#1.offset| 4))) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) |ULTIMATE.start_inspect_before_#t~mem24#1.offset|) (= |ULTIMATE.start_inspect_before_#t~mem24#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0))' at error location [2023-12-02 15:10:03,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:10:03,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:10:03,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 13] total 38 [2023-12-02 15:10:03,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389543174] [2023-12-02 15:10:03,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:10:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 15:10:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 15:10:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2975, Unknown=3, NotChecked=110, Total=3306 [2023-12-02 15:10:03,206 INFO L87 Difference]: Start difference. First operand 333 states and 367 transitions. Second operand has 39 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:10,583 INFO L93 Difference]: Finished difference Result 411 states and 441 transitions. [2023-12-02 15:10:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 15:10:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-02 15:10:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:10,586 INFO L225 Difference]: With dead ends: 411 [2023-12-02 15:10:10,586 INFO L226 Difference]: Without dead ends: 411 [2023-12-02 15:10:10,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=536, Invalid=5165, Unknown=3, NotChecked=148, Total=5852 [2023-12-02 15:10:10,587 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 839 mSDsluCounter, 2749 mSDsCounter, 0 mSdLazyCounter, 3418 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 2938 SdHoareTripleChecker+Invalid, 3441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:10,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 2938 Invalid, 3441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3418 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-12-02 15:10:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-12-02 15:10:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 333. [2023-12-02 15:10:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 245 states have (on average 1.4489795918367347) internal successors, (355), 330 states have internal predecessors, (355), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:10:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 366 transitions. [2023-12-02 15:10:10,594 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 366 transitions. Word has length 51 [2023-12-02 15:10:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:10,594 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 366 transitions. [2023-12-02 15:10:10,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 366 transitions. [2023-12-02 15:10:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 15:10:10,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:10,595 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-12-02 15:10:10,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:10:10,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:10,796 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:10:10,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash 258509577, now seen corresponding path program 1 times [2023-12-02 15:10:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:10,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4957598] [2023-12-02 15:10:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:10,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:10:11,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:11,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4957598] [2023-12-02 15:10:11,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4957598] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:11,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:10:11,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 15:10:11,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638868530] [2023-12-02 15:10:11,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:11,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:10:11,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:11,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:10:11,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:10:11,042 INFO L87 Difference]: Start difference. First operand 333 states and 366 transitions. Second operand has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:11,565 INFO L93 Difference]: Finished difference Result 372 states and 401 transitions. [2023-12-02 15:10:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 15:10:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-02 15:10:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:11,567 INFO L225 Difference]: With dead ends: 372 [2023-12-02 15:10:11,568 INFO L226 Difference]: Without dead ends: 372 [2023-12-02 15:10:11,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:10:11,568 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 155 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:11,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1165 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:10:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-12-02 15:10:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 341. [2023-12-02 15:10:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 254 states have (on average 1.437007874015748) internal successors, (365), 338 states have internal predecessors, (365), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:10:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 376 transitions. [2023-12-02 15:10:11,574 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 376 transitions. Word has length 52 [2023-12-02 15:10:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:11,574 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 376 transitions. [2023-12-02 15:10:11,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 376 transitions. [2023-12-02 15:10:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 15:10:11,574 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:11,574 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-12-02 15:10:11,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-12-02 15:10:11,575 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr85REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:10:11,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash 258509578, now seen corresponding path program 1 times [2023-12-02 15:10:11,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:11,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831563614] [2023-12-02 15:10:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:11,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:10:11,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:11,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831563614] [2023-12-02 15:10:11,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831563614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:11,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:10:11,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:10:11,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862452485] [2023-12-02 15:10:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:11,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:10:11,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:11,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:10:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:10:11,796 INFO L87 Difference]: Start difference. First operand 341 states and 376 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:12,259 INFO L93 Difference]: Finished difference Result 381 states and 410 transitions. [2023-12-02 15:10:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:10:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-02 15:10:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:12,261 INFO L225 Difference]: With dead ends: 381 [2023-12-02 15:10:12,261 INFO L226 Difference]: Without dead ends: 381 [2023-12-02 15:10:12,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:10:12,261 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 145 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:12,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 959 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:10:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-12-02 15:10:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 342. [2023-12-02 15:10:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.4313725490196079) internal successors, (365), 339 states have internal predecessors, (365), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:10:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 376 transitions. [2023-12-02 15:10:12,267 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 376 transitions. Word has length 52 [2023-12-02 15:10:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:12,267 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 376 transitions. [2023-12-02 15:10:12,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 376 transitions. [2023-12-02 15:10:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 15:10:12,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:12,268 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-12-02 15:10:12,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-12-02 15:10:12,268 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:10:12,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash 258512195, now seen corresponding path program 1 times [2023-12-02 15:10:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:12,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672836215] [2023-12-02 15:10:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:10:12,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672836215] [2023-12-02 15:10:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672836215] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:12,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:10:12,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:10:12,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411799928] [2023-12-02 15:10:12,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:12,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:10:12,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:12,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:10:12,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:10:12,406 INFO L87 Difference]: Start difference. First operand 342 states and 376 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:12,680 INFO L93 Difference]: Finished difference Result 374 states and 403 transitions. [2023-12-02 15:10:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:10:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-02 15:10:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:12,683 INFO L225 Difference]: With dead ends: 374 [2023-12-02 15:10:12,683 INFO L226 Difference]: Without dead ends: 374 [2023-12-02 15:10:12,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:10:12,684 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 119 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:12,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 784 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:10:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-12-02 15:10:12,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 344. [2023-12-02 15:10:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 257 states have (on average 1.424124513618677) internal successors, (366), 341 states have internal predecessors, (366), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:10:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 377 transitions. [2023-12-02 15:10:12,689 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 377 transitions. Word has length 52 [2023-12-02 15:10:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:12,689 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 377 transitions. [2023-12-02 15:10:12,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 377 transitions. [2023-12-02 15:10:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 15:10:12,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:12,690 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-12-02 15:10:12,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-12-02 15:10:12,690 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:10:12,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -680310219, now seen corresponding path program 1 times [2023-12-02 15:10:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:12,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338769531] [2023-12-02 15:10:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:12,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:10:12,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:12,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338769531] [2023-12-02 15:10:12,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338769531] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:10:12,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:10:12,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:10:12,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169996059] [2023-12-02 15:10:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:10:12,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:10:12,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:12,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:10:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:10:12,869 INFO L87 Difference]: Start difference. First operand 344 states and 377 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:13,203 INFO L93 Difference]: Finished difference Result 372 states and 401 transitions. [2023-12-02 15:10:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:10:13,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-12-02 15:10:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:13,206 INFO L225 Difference]: With dead ends: 372 [2023-12-02 15:10:13,206 INFO L226 Difference]: Without dead ends: 372 [2023-12-02 15:10:13,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:10:13,206 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 113 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:13,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 759 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:10:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-12-02 15:10:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 347. [2023-12-02 15:10:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 260 states have (on average 1.4307692307692308) internal successors, (372), 344 states have internal predecessors, (372), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:10:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 383 transitions. [2023-12-02 15:10:13,212 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 383 transitions. Word has length 54 [2023-12-02 15:10:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:13,213 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 383 transitions. [2023-12-02 15:10:13,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 383 transitions. [2023-12-02 15:10:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 15:10:13,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:13,214 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:10:13,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-12-02 15:10:13,214 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:10:13,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1801576304, now seen corresponding path program 1 times [2023-12-02 15:10:13,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607684578] [2023-12-02 15:10:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:10:14,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:14,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607684578] [2023-12-02 15:10:14,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607684578] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:10:14,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464303810] [2023-12-02 15:10:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:14,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:14,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:10:14,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:10:14,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 15:10:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:14,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-02 15:10:14,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:10:14,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:10:14,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:10:14,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:10:14,974 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 15:10:14,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 15:10:14,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 15:10:14,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 15:10:15,045 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 27 treesize of output 15 [2023-12-02 15:10:15,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 15:10:15,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-12-02 15:10:15,138 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:10:15,138 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 37 [2023-12-02 15:10:15,248 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-12-02 15:10:15,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-12-02 15:10:15,347 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-12-02 15:10:15,347 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 49 [2023-12-02 15:10:15,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-12-02 15:10:15,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-12-02 15:10:15,411 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-12-02 15:10:15,412 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 49 [2023-12-02 15:10:15,438 INFO L349 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2023-12-02 15:10:15,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2023-12-02 15:10:15,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-12-02 15:10:15,522 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-12-02 15:10:15,523 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 42 [2023-12-02 15:10:15,550 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 15:10:15,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 44 [2023-12-02 15:10:15,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2023-12-02 15:10:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:10:16,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:10:16,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:16,930 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2023-12-02 15:10:16,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:16,935 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 15:10:16,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:16,945 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2023-12-02 15:10:16,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:16,950 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-12-02 15:10:23,139 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base|)) (.cse7 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~node~1#1.offset| 4))) (and (forall ((v_ArrVal_2517 (Array Int Int)) (v_ArrVal_2516 (Array Int Int)) (v_ArrVal_2526 (Array Int Int)) (|ULTIMATE.start_main_~data~0#1.offset| Int) (|v_ULTIMATE.start_main_~node~1#1.base_95| Int) (v_ArrVal_2525 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_109| Int) (v_arrayElimArr_28 (Array Int Int)) (|ULTIMATE.start_main_~data~0#1.base| Int) (v_arrayElimArr_29 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_28 4))) (let ((.cse1 (store |c_#valid| .cse0 1))) (or (not (= (select |c_#valid| .cse0) 0)) (not (= 0 (select .cse1 |v_ULTIMATE.start_main_~node~1#1.base_95|))) (not (= v_ArrVal_2517 (store .cse2 .cse3 (select v_ArrVal_2517 .cse3)))) (= (select (let ((.cse4 (store (store (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_2517))) (store .cse5 .cse0 (store (store (select .cse5 .cse0) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |ULTIMATE.start_main_~data~0#1.base|))) |v_ULTIMATE.start_main_~node~1#1.base_95| v_ArrVal_2526) |v_ULTIMATE.start_main_~item~0#1.base_109| v_arrayElimArr_28))) (select .cse4 (select (select .cse4 .cse0) 0))) (select (select (store (store (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_2516))) (store .cse6 .cse0 (store (store (select .cse6 .cse0) 0 |c_ULTIMATE.start_main_~node~1#1.offset|) 4 |ULTIMATE.start_main_~data~0#1.offset|))) |v_ULTIMATE.start_main_~node~1#1.base_95| v_ArrVal_2525) |v_ULTIMATE.start_main_~item~0#1.base_109| v_arrayElimArr_29) .cse0) 0)) 0) (not (= (select (store .cse1 |v_ULTIMATE.start_main_~node~1#1.base_95| 1) |v_ULTIMATE.start_main_~item~0#1.base_109|) 0)) (not (= (store .cse7 .cse3 (select v_ArrVal_2516 .cse3)) v_ArrVal_2516)) (not (= (select v_arrayElimArr_29 4) 0)))))) (forall ((v_ArrVal_2517 (Array Int Int)) (v_ArrVal_2516 (Array Int Int)) (v_ArrVal_2526 (Array Int Int)) (|ULTIMATE.start_main_~data~0#1.offset| Int) (|v_ULTIMATE.start_main_~node~1#1.base_95| Int) (v_ArrVal_2525 (Array Int Int)) (v_arrayElimArr_26 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_109| Int) (v_arrayElimArr_27 (Array Int Int)) (|ULTIMATE.start_main_~data~0#1.base| Int)) (let ((.cse11 (select v_arrayElimArr_26 4))) (let ((.cse8 (store |c_#valid| .cse11 1))) (or (not (= (select .cse8 |v_ULTIMATE.start_main_~node~1#1.base_95|) 0)) (= (let ((.cse9 (store (store (let ((.cse12 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_2516))) (store .cse12 .cse11 (store (store (select .cse12 .cse11) 0 |c_ULTIMATE.start_main_~node~1#1.offset|) 4 |ULTIMATE.start_main_~data~0#1.offset|))) |v_ULTIMATE.start_main_~node~1#1.base_95| v_ArrVal_2525) |v_ULTIMATE.start_main_~item~0#1.base_109| v_arrayElimArr_27))) (select (select .cse9 (select (select (store (store (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_2517))) (store .cse10 .cse11 (store (store (select .cse10 .cse11) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |ULTIMATE.start_main_~data~0#1.base|))) |v_ULTIMATE.start_main_~node~1#1.base_95| v_ArrVal_2526) |v_ULTIMATE.start_main_~item~0#1.base_109| v_arrayElimArr_26) .cse11) 0)) (select (select .cse9 .cse11) 0))) 0) (not (= (select (store .cse8 |v_ULTIMATE.start_main_~node~1#1.base_95| 1) |v_ULTIMATE.start_main_~item~0#1.base_109|) 0)) (not (= v_ArrVal_2517 (store .cse2 .cse3 (select v_ArrVal_2517 .cse3)))) (not (= 0 (select |c_#valid| .cse11))) (not (= (select v_arrayElimArr_27 4) 0)) (not (= (store .cse7 .cse3 (select v_ArrVal_2516 .cse3)) v_ArrVal_2516)))))))) is different from false [2023-12-02 15:10:23,162 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:10:23,163 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:10:23,202 INFO L349 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2023-12-02 15:10:23,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6675 treesize of output 6504 [2023-12-02 15:10:23,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:10:23,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:10:23,241 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 650 treesize of output 648 [2023-12-02 15:10:23,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:23,253 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 1 case distinctions, treesize of input 16 treesize of output 6 [2023-12-02 15:10:23,254 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 6 treesize of output 4 [2023-12-02 15:10:23,270 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 118 treesize of output 114 [2023-12-02 15:10:23,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:23,282 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 120 treesize of output 118 [2023-12-02 15:10:23,290 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 149 treesize of output 137 [2023-12-02 15:10:23,406 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:10:23,407 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:10:23,409 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 166 treesize of output 164 [2023-12-02 15:10:23,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:23,413 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 1 case distinctions, treesize of input 16 treesize of output 6 [2023-12-02 15:10:23,415 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 6 treesize of output 4 [2023-12-02 15:10:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:10:23,419 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:10:23,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:23,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9892 treesize of output 9644 [2023-12-02 15:10:23,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:10:23,464 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 161 treesize of output 149 [2023-12-02 15:10:23,472 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 106 treesize of output 102 [2023-12-02 15:10:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 17 refuted. 1 times theorem prover too weak. 2 trivial. 1 not checked. [2023-12-02 15:10:25,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464303810] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:10:25,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754294099] [2023-12-02 15:10:25,961 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 15:10:25,961 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:10:25,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:10:25,961 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:10:25,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:10:30,973 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 3 for LOIs [2023-12-02 15:10:30,975 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:10:36,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35976#(<= 1 |#StackHeapBarrier|)' at error location [2023-12-02 15:10:36,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:10:36,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:10:36,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 16] total 42 [2023-12-02 15:10:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099882741] [2023-12-02 15:10:36,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:10:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 15:10:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:10:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 15:10:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3271, Unknown=11, NotChecked=116, Total=3660 [2023-12-02 15:10:36,179 INFO L87 Difference]: Start difference. First operand 347 states and 383 transitions. Second operand has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 42 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:10:42,728 INFO L93 Difference]: Finished difference Result 425 states and 457 transitions. [2023-12-02 15:10:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 15:10:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 42 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-12-02 15:10:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:10:42,730 INFO L225 Difference]: With dead ends: 425 [2023-12-02 15:10:42,730 INFO L226 Difference]: Without dead ends: 425 [2023-12-02 15:10:42,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=540, Invalid=5153, Unknown=11, NotChecked=148, Total=5852 [2023-12-02 15:10:42,731 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 518 mSDsluCounter, 4580 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 4781 SdHoareTripleChecker+Invalid, 3609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:10:42,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 4781 Invalid, 3609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3299 Invalid, 0 Unknown, 296 Unchecked, 4.5s Time] [2023-12-02 15:10:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-12-02 15:10:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 348. [2023-12-02 15:10:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 261 states have (on average 1.4291187739463602) internal successors, (373), 345 states have internal predecessors, (373), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:10:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 384 transitions. [2023-12-02 15:10:42,737 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 384 transitions. Word has length 56 [2023-12-02 15:10:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:10:42,737 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 384 transitions. [2023-12-02 15:10:42,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 42 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:10:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 384 transitions. [2023-12-02 15:10:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 15:10:42,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:10:42,738 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 15:10:42,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 15:10:42,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 15:10:42,939 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-12-02 15:10:42,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:10:42,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1720426305, now seen corresponding path program 3 times [2023-12-02 15:10:42,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:10:42,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136086446] [2023-12-02 15:10:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:10:42,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:10:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:10:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:10:44,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:10:44,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136086446] [2023-12-02 15:10:44,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136086446] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:10:44,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331158603] [2023-12-02 15:10:44,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:10:44,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:10:44,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:10:44,098 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:10:44,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e361da9e-902f-434e-a2a7-237fee00e5a9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 15:10:44,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:10:44,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:10:44,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-02 15:10:44,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:10:44,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:10:44,396 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 15:10:44,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-02 15:10:44,412 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 15:10:44,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-02 15:10:44,429 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 15 treesize of output 1 [2023-12-02 15:10:44,453 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2023-12-02 15:10:44,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2023-12-02 15:10:44,508 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:10:44,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-12-02 15:10:44,512 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 7 treesize of output 5 [2023-12-02 15:10:44,601 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:10:44,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 27 [2023-12-02 15:10:44,672 INFO L349 Elim1Store]: treesize reduction 122, result has 32.6 percent of original size [2023-12-02 15:10:44,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 41 treesize of output 79 [2023-12-02 15:10:44,773 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 7 treesize of output 5 [2023-12-02 15:10:44,779 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 5 treesize of output 3 [2023-12-02 15:10:44,788 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 25 treesize of output 21 [2023-12-02 15:10:44,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:10:44,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 92 [2023-12-02 15:10:45,227 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 19 treesize of output 18 [2023-12-02 15:10:45,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 112 [2023-12-02 15:10:53,125 INFO L349 Elim1Store]: treesize reduction 8, result has 99.2 percent of original size [2023-12-02 15:10:53,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 1 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 559 treesize of output 1483