./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/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_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/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_ec20403d-c04b-411e-9887-865cb827caf3/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 cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:06:04,769 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:06:04,830 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 14:06:04,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:06:04,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:06:04,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:06:04,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:06:04,860 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:06:04,861 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:06:04,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:06:04,862 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:06:04,863 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:06:04,863 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:06:04,864 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:06:04,864 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:06:04,865 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:06:04,865 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:06:04,866 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:06:04,866 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:06:04,867 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:06:04,867 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:06:04,868 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:06:04,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:06:04,869 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:06:04,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:06:04,870 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:06:04,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:06:04,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:06:04,871 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:06:04,872 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:06:04,872 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:06:04,873 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:06:04,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:06:04,873 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:06:04,873 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:06:04,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:06:04,874 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:06:04,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:06:04,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:06:04,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:06:04,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:06:04,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:06:04,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:06:04,875 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:06:04,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:06:04,876 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:06:04,876 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:06:04,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:06:04,876 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_ec20403d-c04b-411e-9887-865cb827caf3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c [2023-12-02 14:06:05,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:06:05,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:06:05,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:06:05,125 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:06:05,125 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:06:05,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2023-12-02 14:06:07,862 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:06:08,074 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:06:08,075 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2023-12-02 14:06:08,089 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/data/991698efc/53c216969fe340d19e6af0a2ca75c3b9/FLAG6ef75be3b [2023-12-02 14:06:08,103 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/data/991698efc/53c216969fe340d19e6af0a2ca75c3b9 [2023-12-02 14:06:08,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:06:08,107 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:06:08,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:06:08,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:06:08,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:06:08,115 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,116 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1072555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08, skipping insertion in model container [2023-12-02 14:06:08,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:06:08,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:06:08,463 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:06:08,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:06:08,527 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:06:08,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08 WrapperNode [2023-12-02 14:06:08,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:06:08,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:06:08,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:06:08,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:06:08,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,570 INFO L138 Inliner]: procedures = 124, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-12-02 14:06:08,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:06:08,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:06:08,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:06:08,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:06:08,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,585 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,585 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,592 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,597 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,598 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,601 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:06:08,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:06:08,602 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:06:08,602 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:06:08,603 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (1/1) ... [2023-12-02 14:06:08,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:06:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:08,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:06:08,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:06:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-12-02 14:06:08,672 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-12-02 14:06:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:06:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:06:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 14:06:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:06:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 14:06:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 14:06:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:06:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:06:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:06:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:06:08,789 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:06:08,792 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:06:08,819 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-12-02 14:06:08,987 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:06:09,039 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:06:09,039 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 14:06:09,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:06:09 BoogieIcfgContainer [2023-12-02 14:06:09,041 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:06:09,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:06:09,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:06:09,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:06:09,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:06:08" (1/3) ... [2023-12-02 14:06:09,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab30a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:06:09, skipping insertion in model container [2023-12-02 14:06:09,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:06:08" (2/3) ... [2023-12-02 14:06:09,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab30a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:06:09, skipping insertion in model container [2023-12-02 14:06:09,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:06:09" (3/3) ... [2023-12-02 14:06:09,050 INFO L112 eAbstractionObserver]: Analyzing ICFG simple-ext_1.i [2023-12-02 14:06:09,065 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:06:09,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-12-02 14:06:09,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:06:09,116 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;@26a23a76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:06:09,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-12-02 14:06:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 14:06:09,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:09,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 14:06:09,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:09,134 INFO L85 PathProgramCache]: Analyzing trace with hash 150937256, now seen corresponding path program 1 times [2023-12-02 14:06:09,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:09,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829851428] [2023-12-02 14:06:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:09,278 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 14:06:09,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:09,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829851428] [2023-12-02 14:06:09,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829851428] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:09,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:06:09,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:06:09,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73779037] [2023-12-02 14:06:09,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:09,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 14:06:09,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 14:06:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 14:06:09,319 INFO L87 Difference]: Start difference. First operand has 50 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:09,360 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-12-02 14:06:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 14:06:09,362 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 14:06:09,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:09,369 INFO L225 Difference]: With dead ends: 49 [2023-12-02 14:06:09,369 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 14:06:09,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 14:06:09,374 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:09,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:06:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 14:06:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-02 14:06:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 2.0) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-12-02 14:06:09,408 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 5 [2023-12-02 14:06:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:09,408 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-12-02 14:06:09,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-12-02 14:06:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:06:09,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:09,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:06:09,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:06:09,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:09,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:09,411 INFO L85 PathProgramCache]: Analyzing trace with hash 384171487, now seen corresponding path program 1 times [2023-12-02 14:06:09,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:09,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143810612] [2023-12-02 14:06:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:09,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:09,525 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 14:06:09,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143810612] [2023-12-02 14:06:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143810612] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:09,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:06:09,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:06:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809765948] [2023-12-02 14:06:09,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:09,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:06:09,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:06:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:06:09,530 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:09,652 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-12-02 14:06:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:06:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 14:06:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:09,654 INFO L225 Difference]: With dead ends: 58 [2023-12-02 14:06:09,654 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 14:06:09,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:06:09,656 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:09,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 15 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:06:09,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 14:06:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2023-12-02 14:06:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2023-12-02 14:06:09,664 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 6 [2023-12-02 14:06:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:09,665 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2023-12-02 14:06:09,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2023-12-02 14:06:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:06:09,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:09,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:06:09,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:06:09,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:09,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:09,667 INFO L85 PathProgramCache]: Analyzing trace with hash 384171488, now seen corresponding path program 1 times [2023-12-02 14:06:09,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:09,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047754211] [2023-12-02 14:06:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:09,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:09,800 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 14:06:09,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:09,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047754211] [2023-12-02 14:06:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047754211] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:09,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:06:09,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:06:09,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138297858] [2023-12-02 14:06:09,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:09,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:06:09,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:09,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:06:09,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:06:09,804 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:09,934 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2023-12-02 14:06:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:06:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 14:06:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:09,936 INFO L225 Difference]: With dead ends: 62 [2023-12-02 14:06:09,937 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 14:06:09,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:06:09,938 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:09,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 19 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:06:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 14:06:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2023-12-02 14:06:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-12-02 14:06:09,946 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 6 [2023-12-02 14:06:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:09,946 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-12-02 14:06:09,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-12-02 14:06:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 14:06:09,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:09,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:09,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:06:09,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:09,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash 370600693, now seen corresponding path program 1 times [2023-12-02 14:06:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:09,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237293882] [2023-12-02 14:06:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:10,087 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 14:06:10,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:10,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237293882] [2023-12-02 14:06:10,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237293882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:10,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:06:10,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:06:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657005519] [2023-12-02 14:06:10,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:06:10,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:06:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:06:10,091 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:10,160 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2023-12-02 14:06:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:06:10,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 14:06:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:10,161 INFO L225 Difference]: With dead ends: 60 [2023-12-02 14:06:10,161 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 14:06:10,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:06:10,163 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:10,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 30 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:06:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 14:06:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-12-02 14:06:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 53 states have internal predecessors, (58), 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 14:06:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-12-02 14:06:10,170 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 10 [2023-12-02 14:06:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:10,171 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-12-02 14:06:10,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-12-02 14:06:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 14:06:10,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:10,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:10,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:06:10,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:10,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash -404450213, now seen corresponding path program 1 times [2023-12-02 14:06:10,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:10,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010036801] [2023-12-02 14:06:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:10,356 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 14:06:10,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:10,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010036801] [2023-12-02 14:06:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010036801] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:10,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:06:10,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:06:10,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069605284] [2023-12-02 14:06:10,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:10,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:06:10,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:06:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:06:10,359 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:10,511 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2023-12-02 14:06:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:06:10,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 14:06:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:10,512 INFO L225 Difference]: With dead ends: 61 [2023-12-02 14:06:10,512 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 14:06:10,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:06:10,514 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:10,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 72 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:06:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 14:06:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-12-02 14:06:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 56 states have internal predecessors, (61), 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 14:06:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-12-02 14:06:10,520 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 12 [2023-12-02 14:06:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:10,521 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-12-02 14:06:10,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-12-02 14:06:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 14:06:10,522 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:10,522 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:10,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:06:10,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:10,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:10,523 INFO L85 PathProgramCache]: Analyzing trace with hash 158252498, now seen corresponding path program 1 times [2023-12-02 14:06:10,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:10,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001838106] [2023-12-02 14:06:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:10,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:10,618 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 14:06:10,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001838106] [2023-12-02 14:06:10,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001838106] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:10,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:06:10,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:06:10,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201322333] [2023-12-02 14:06:10,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:10,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:06:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:10,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:06:10,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:06:10,621 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:10,742 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2023-12-02 14:06:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:06:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 14:06:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:10,744 INFO L225 Difference]: With dead ends: 68 [2023-12-02 14:06:10,744 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 14:06:10,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:06:10,745 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:10,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 52 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:06:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 14:06:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2023-12-02 14:06:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 54 states have internal predecessors, (59), 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 14:06:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-12-02 14:06:10,751 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 12 [2023-12-02 14:06:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:10,751 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-12-02 14:06:10,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-12-02 14:06:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 14:06:10,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:10,753 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:10,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:06:10,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:10,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash 158252499, now seen corresponding path program 1 times [2023-12-02 14:06:10,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:10,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472600312] [2023-12-02 14:06:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:10,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:10,922 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 14:06:10,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:10,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472600312] [2023-12-02 14:06:10,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472600312] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:10,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:06:10,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:06:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966784510] [2023-12-02 14:06:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:10,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:06:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:06:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:06:10,925 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:11,088 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-12-02 14:06:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:06:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 14:06:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:11,089 INFO L225 Difference]: With dead ends: 63 [2023-12-02 14:06:11,089 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 14:06:11,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:06:11,090 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:11,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 67 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:06:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 14:06:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2023-12-02 14:06:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 states have internal predecessors, (50), 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 14:06:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-12-02 14:06:11,095 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 12 [2023-12-02 14:06:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:11,096 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-12-02 14:06:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-12-02 14:06:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 14:06:11,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:11,097 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 14:06:11,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:11,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash 345684089, now seen corresponding path program 1 times [2023-12-02 14:06:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605256443] [2023-12-02 14:06:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:11,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605256443] [2023-12-02 14:06:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605256443] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:06:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942513705] [2023-12-02 14:06:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:11,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:11,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:11,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:06:11,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:06:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:11,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 14:06:11,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:06:11,483 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 14:06:11,488 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 14:06:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:11,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:06:11,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-12-02 14:06:11,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2023-12-02 14:06:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:11,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942513705] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:06:11,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798260099] [2023-12-02 14:06:11,845 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 14:06:11,846 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:06:11,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:06:11,855 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:06:11,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:06:12,263 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:06:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [798260099] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:13,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:06:13,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7, 7] total 19 [2023-12-02 14:06:13,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037540490] [2023-12-02 14:06:13,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:13,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:06:13,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:06:13,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=269, Unknown=2, NotChecked=0, Total=380 [2023-12-02 14:06:13,782 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:14,197 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2023-12-02 14:06:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:06:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 14:06:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:14,198 INFO L225 Difference]: With dead ends: 58 [2023-12-02 14:06:14,199 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 14:06:14,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=109, Invalid=269, Unknown=2, NotChecked=0, Total=380 [2023-12-02 14:06:14,200 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:14,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 7 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:06:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 14:06:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2023-12-02 14:06:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-12-02 14:06:14,204 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 13 [2023-12-02 14:06:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:14,205 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-12-02 14:06:14,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-12-02 14:06:14,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 14:06:14,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:14,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:14,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:06:14,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 14:06:14,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:14,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash -988293169, now seen corresponding path program 1 times [2023-12-02 14:06:14,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794549881] [2023-12-02 14:06:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:06:14,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:14,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794549881] [2023-12-02 14:06:14,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794549881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:14,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:06:14,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:06:14,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004736281] [2023-12-02 14:06:14,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:14,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:06:14,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:06:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:06:14,463 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:14,519 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-12-02 14:06:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:06:14,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 14:06:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:14,520 INFO L225 Difference]: With dead ends: 59 [2023-12-02 14:06:14,520 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 14:06:14,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:06:14,521 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:14,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:06:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 14:06:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2023-12-02 14:06:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.35) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-12-02 14:06:14,525 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 16 [2023-12-02 14:06:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:14,526 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-12-02 14:06:14,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-12-02 14:06:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 14:06:14,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:14,527 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 14:06:14,527 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:14,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash -785624562, now seen corresponding path program 1 times [2023-12-02 14:06:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:14,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194743700] [2023-12-02 14:06:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:14,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:14,837 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 14:06:14,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:14,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194743700] [2023-12-02 14:06:14,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194743700] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:06:14,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202019823] [2023-12-02 14:06:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:14,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:14,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:14,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:06:14,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:06:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:14,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 14:06:14,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:06:15,003 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:06:15,003 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 14:06:15,013 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 14:06:15,059 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 14:06:15,067 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 14:06:15,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-02 14:06:15,144 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 14:06:15,160 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 16 treesize of output 11 [2023-12-02 14:06:15,206 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 14:06:15,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:06:15,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:15,482 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 23 treesize of output 29 [2023-12-02 14:06:15,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:15,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2023-12-02 14:06:15,511 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 14:06:15,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-12-02 14:06:15,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 14:06:15,669 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 14:06:15,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202019823] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:06:15,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225599819] [2023-12-02 14:06:15,673 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 14:06:15,673 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:06:15,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:06:15,673 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:06:15,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:06:17,229 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:06:20,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1317#(and (<= 0 |ULTIMATE.start_main_~p~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 0)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (<= (+ |ULTIMATE.start_main_~p~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (exists ((|v_#memory_int_41| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_84| Int) (|v_#memory_$Pointer$.base_44| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_44| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~i~0#1_47| Int) (|v_#memory_$Pointer$.offset_43| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_73| Int) (|v_#memory_$Pointer$.base_45| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_44| |v_ULTIMATE.start_main_~p~0#1.base_84| (store (select |v_#memory_$Pointer$.base_44| |v_ULTIMATE.start_main_~p~0#1.base_84|) |v_ULTIMATE.start_main_~p~0#1.offset_73| (select (select |v_#memory_$Pointer$.base_45| |v_ULTIMATE.start_main_~p~0#1.base_84|) |v_ULTIMATE.start_main_~p~0#1.offset_73|))) |v_#memory_$Pointer$.base_45|) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_73|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_84| (store (select |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_84|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 4) 0))) (= (store |v_#memory_$Pointer$.offset_43| |v_ULTIMATE.start_main_~p~0#1.base_84| (store (select |v_#memory_$Pointer$.offset_43| |v_ULTIMATE.start_main_~p~0#1.base_84|) |v_ULTIMATE.start_main_~p~0#1.offset_73| (select (select |v_#memory_$Pointer$.offset_44| |v_ULTIMATE.start_main_~p~0#1.base_84|) |v_ULTIMATE.start_main_~p~0#1.offset_73|))) |v_#memory_$Pointer$.offset_44|) (= (store |v_#memory_$Pointer$.base_45| |v_ULTIMATE.start_main_~p~0#1.base_84| (store (select |v_#memory_$Pointer$.base_45| |v_ULTIMATE.start_main_~p~0#1.base_84|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 4) 0)) |#memory_$Pointer$.base|) (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 8) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_84|)) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_84|) 1) (= (store |v_#memory_int_41| |v_ULTIMATE.start_main_~p~0#1.base_84| (store (store (select |v_#memory_int_41| |v_ULTIMATE.start_main_~p~0#1.base_84|) |v_ULTIMATE.start_main_~p~0#1.offset_73| |v_ULTIMATE.start_main_~i~0#1_47|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_84|) (+ |v_ULTIMATE.start_main_~p~0#1.offset_73| 4)))) |#memory_int|))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (or (not (= |ULTIMATE.start_main_~p~0#1.offset| 0)) (not (= 0 |ULTIMATE.start_main_~p~0#1.base|))) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1))' at error location [2023-12-02 14:06:20,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:06:20,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:06:20,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-12-02 14:06:20,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526054564] [2023-12-02 14:06:20,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:06:20,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 14:06:20,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 14:06:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=987, Unknown=7, NotChecked=0, Total=1122 [2023-12-02 14:06:20,122 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:20,877 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-12-02 14:06:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 14:06:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-02 14:06:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:20,879 INFO L225 Difference]: With dead ends: 66 [2023-12-02 14:06:20,879 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 14:06:20,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=300, Invalid=1762, Unknown=8, NotChecked=0, Total=2070 [2023-12-02 14:06:20,881 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 117 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 49 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:20,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 108 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 419 Invalid, 2 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:06:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 14:06:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2023-12-02 14:06:20,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.325) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-12-02 14:06:20,885 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 18 [2023-12-02 14:06:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:20,886 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-12-02 14:06:20,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-12-02 14:06:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:06:20,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:20,887 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:20,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:06:21,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 14:06:21,088 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:21,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash -240839931, now seen corresponding path program 1 times [2023-12-02 14:06:21,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:21,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992656395] [2023-12-02 14:06:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:21,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:06:21,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992656395] [2023-12-02 14:06:21,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992656395] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:06:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870968152] [2023-12-02 14:06:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:21,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:21,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:21,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:06:21,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:06:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:21,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 14:06:21,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:06:21,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:06:21,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:06:21,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:21,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-12-02 14:06:21,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:21,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-12-02 14:06:21,570 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 14:06:21,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:06:21,765 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 14:06:21,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 55 [2023-12-02 14:06:21,771 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:06:21,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2023-12-02 14:06:21,780 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:06:21,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:21,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 58 [2023-12-02 14:06:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:06:21,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2023-12-02 14:06:21,815 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 14:06:21,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870968152] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:06:21,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191903949] [2023-12-02 14:06:21,818 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 14:06:21,818 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:06:21,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:06:21,819 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:06:21,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:06:22,163 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:06:24,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [191903949] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:24,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:06:24,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 10, 9] total 28 [2023-12-02 14:06:24,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29286208] [2023-12-02 14:06:24,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:24,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 14:06:24,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:24,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 14:06:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=619, Unknown=2, NotChecked=0, Total=812 [2023-12-02 14:06:24,301 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:24,929 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-12-02 14:06:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:06:24,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 14:06:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:24,930 INFO L225 Difference]: With dead ends: 61 [2023-12-02 14:06:24,930 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 14:06:24,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=191, Invalid=619, Unknown=2, NotChecked=0, Total=812 [2023-12-02 14:06:24,931 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 6 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:24,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 266 Invalid, 8 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:06:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 14:06:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2023-12-02 14:06:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-12-02 14:06:24,936 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 19 [2023-12-02 14:06:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:24,936 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-12-02 14:06:24,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-12-02 14:06:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:06:24,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:24,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:24,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:06:25,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 14:06:25,138 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:25,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash -240838925, now seen corresponding path program 1 times [2023-12-02 14:06:25,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:25,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260448262] [2023-12-02 14:06:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:25,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:06:25,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:25,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260448262] [2023-12-02 14:06:25,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260448262] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:06:25,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190577382] [2023-12-02 14:06:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:25,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:25,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:06:25,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:06:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:25,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:06:25,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:06:25,335 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 13 treesize of output 9 [2023-12-02 14:06:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:06:25,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:06:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:06:25,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190577382] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:06:25,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1988976787] [2023-12-02 14:06:25,379 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 14:06:25,379 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:06:25,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:06:25,380 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:06:25,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:06:25,706 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:06:27,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1988976787] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:06:27,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:06:27,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 15 [2023-12-02 14:06:27,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259868550] [2023-12-02 14:06:27,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:06:27,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:06:27,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:06:27,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=195, Unknown=2, NotChecked=0, Total=272 [2023-12-02 14:06:27,896 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 14:06:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:28,273 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2023-12-02 14:06:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 14:06:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 19 [2023-12-02 14:06:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:28,275 INFO L225 Difference]: With dead ends: 57 [2023-12-02 14:06:28,275 INFO L226 Difference]: Without dead ends: 43 [2023-12-02 14:06:28,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=75, Invalid=195, Unknown=2, NotChecked=0, Total=272 [2023-12-02 14:06:28,276 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:28,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 10 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:06:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-02 14:06:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-12-02 14:06:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 41 states have internal predecessors, (44), 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 14:06:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-12-02 14:06:28,279 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 19 [2023-12-02 14:06:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:28,279 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-12-02 14:06:28,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 14:06:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-12-02 14:06:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:06:28,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:28,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:28,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:06:28,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:28,481 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:28,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1414181158, now seen corresponding path program 1 times [2023-12-02 14:06:28,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:28,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917790655] [2023-12-02 14:06:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:28,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:28,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917790655] [2023-12-02 14:06:28,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917790655] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:06:28,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697584931] [2023-12-02 14:06:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:28,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:28,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:28,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:06:28,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:06:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:28,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 14:06:28,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:06:28,908 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 14:06:28,908 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 14:06:28,968 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 19 treesize of output 1 [2023-12-02 14:06:29,094 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 14:06:29,095 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 39 treesize of output 30 [2023-12-02 14:06:29,123 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 14:06:29,124 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 14:06:29,184 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 14:06:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:29,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:06:29,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:29,378 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 24 treesize of output 25 [2023-12-02 14:06:29,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:29,387 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 40 treesize of output 39 [2023-12-02 14:06:29,393 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 13 treesize of output 9 [2023-12-02 14:06:29,655 INFO L349 Elim1Store]: treesize reduction 5, result has 95.9 percent of original size [2023-12-02 14:06:29,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 205 [2023-12-02 14:06:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:30,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697584931] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:06:30,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063282904] [2023-12-02 14:06:30,185 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 14:06:30,185 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:06:30,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:06:30,186 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:06:30,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:06:31,435 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:06:33,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2077#(and (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 14:06:33,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:06:33,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:06:33,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-12-02 14:06:33,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918063481] [2023-12-02 14:06:33,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:06:33,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 14:06:33,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 14:06:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1091, Unknown=4, NotChecked=0, Total=1260 [2023-12-02 14:06:33,927 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:34,390 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2023-12-02 14:06:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 14:06:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 14:06:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:34,391 INFO L225 Difference]: With dead ends: 83 [2023-12-02 14:06:34,391 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 14:06:34,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=227, Invalid=1409, Unknown=4, NotChecked=0, Total=1640 [2023-12-02 14:06:34,392 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 187 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:34,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 91 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:06:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 14:06:34,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2023-12-02 14:06:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 62 states have internal predecessors, (70), 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 14:06:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-12-02 14:06:34,395 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 19 [2023-12-02 14:06:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:34,396 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-12-02 14:06:34,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-12-02 14:06:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:06:34,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:34,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:34,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:06:34,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:34,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:34,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:34,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1414181159, now seen corresponding path program 1 times [2023-12-02 14:06:34,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:34,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243660243] [2023-12-02 14:06:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:34,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:35,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:35,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243660243] [2023-12-02 14:06:35,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243660243] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:06:35,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045894487] [2023-12-02 14:06:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:35,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:35,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:35,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:06:35,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:06:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:35,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 14:06:35,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:06:35,135 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:06:35,135 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 14:06:35,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-12-02 14:06:35,186 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 19 treesize of output 1 [2023-12-02 14:06:35,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 14:06:35,330 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 14:06:35,330 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 39 treesize of output 30 [2023-12-02 14:06:35,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:06:35,336 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 18 treesize of output 13 [2023-12-02 14:06:35,369 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 14:06:35,369 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 14:06:35,374 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 11 [2023-12-02 14:06:35,446 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 14:06:35,449 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 14:06:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:35,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:06:35,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:35,822 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 22 treesize of output 23 [2023-12-02 14:06:35,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:35,831 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 40 treesize of output 39 [2023-12-02 14:06:35,836 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 11 treesize of output 7 [2023-12-02 14:06:35,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:35,873 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 46 [2023-12-02 14:06:35,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:35,882 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 35 treesize of output 36 [2023-12-02 14:06:35,885 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:06:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:06:35,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:06:35,890 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-12-02 14:06:35,894 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:06:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:06:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:06:35,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 14:06:36,000 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 14:06:36,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-12-02 14:06:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:36,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045894487] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:06:36,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1481222210] [2023-12-02 14:06:36,091 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 14:06:36,091 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:06:36,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:06:36,091 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:06:36,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:06:37,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:06:39,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2378#(and (<= 0 |ULTIMATE.start_main_~i~0#1|) (or (< |ULTIMATE.start_main_~p~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~p~0#1.base|) (+ |ULTIMATE.start_main_~p~0#1.offset| 4))))' at error location [2023-12-02 14:06:39,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:06:39,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:06:39,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-12-02 14:06:39,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942401720] [2023-12-02 14:06:39,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:06:39,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 14:06:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 14:06:39,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1173, Unknown=7, NotChecked=0, Total=1332 [2023-12-02 14:06:39,816 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 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 14:06:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:40,460 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2023-12-02 14:06:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 14:06:40,461 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 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 19 [2023-12-02 14:06:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:40,461 INFO L225 Difference]: With dead ends: 79 [2023-12-02 14:06:40,461 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 14:06:40,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=270, Invalid=1790, Unknown=10, NotChecked=0, Total=2070 [2023-12-02 14:06:40,462 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 204 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:40,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 99 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:06:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 14:06:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2023-12-02 14:06:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-12-02 14:06:40,465 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 19 [2023-12-02 14:06:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:40,465 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-12-02 14:06:40,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 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 14:06:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-12-02 14:06:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 14:06:40,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:40,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:40,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:06:40,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:40,667 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:40,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash 536770207, now seen corresponding path program 1 times [2023-12-02 14:06:40,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:40,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950516826] [2023-12-02 14:06:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:40,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:41,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:41,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950516826] [2023-12-02 14:06:41,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950516826] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:06:41,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073013478] [2023-12-02 14:06:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:41,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:41,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:41,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:06:41,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:06:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:41,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 14:06:41,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:06:41,405 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:06:41,405 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 14:06:41,440 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 14:06:41,442 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 14:06:41,499 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 14:06:41,505 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 14:06:41,511 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 14:06:41,541 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 14:06:41,541 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 68 [2023-12-02 14:06:41,548 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 11 [2023-12-02 14:06:41,554 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 39 treesize of output 15 [2023-12-02 14:06:41,629 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 27 treesize of output 15 [2023-12-02 14:06:41,633 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 14:06:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:41,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:06:41,818 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 458 treesize of output 414 [2023-12-02 14:06:42,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:42,045 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 22 treesize of output 23 [2023-12-02 14:06:42,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:42,054 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 36 treesize of output 35 [2023-12-02 14:06:42,060 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 11 treesize of output 7 [2023-12-02 14:06:42,089 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-12-02 14:06:42,089 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 22 treesize of output 1 [2023-12-02 14:06:42,198 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 14:06:42,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-12-02 14:06:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073013478] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:06:42,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296584259] [2023-12-02 14:06:42,311 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 14:06:42,312 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:06:42,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:06:42,312 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:06:42,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:06:43,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:06:46,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2704#(and (<= 0 |ULTIMATE.start_main_~p~0#1.offset|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) |ULTIMATE.start_main_~i~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~p~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1))' at error location [2023-12-02 14:06:46,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:06:46,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:06:46,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2023-12-02 14:06:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625121919] [2023-12-02 14:06:46,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:06:46,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 14:06:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:06:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 14:06:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1248, Unknown=2, NotChecked=0, Total=1406 [2023-12-02 14:06:46,253 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:06:46,873 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2023-12-02 14:06:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:06:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 14:06:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:06:46,874 INFO L225 Difference]: With dead ends: 71 [2023-12-02 14:06:46,874 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 14:06:46,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=247, Invalid=1731, Unknown=2, NotChecked=0, Total=1980 [2023-12-02 14:06:46,875 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:06:46,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 136 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:06:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 14:06:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2023-12-02 14:06:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 62 states have internal predecessors, (68), 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 14:06:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-12-02 14:06:46,878 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 22 [2023-12-02 14:06:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:06:46,878 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-12-02 14:06:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:06:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-12-02 14:06:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 14:06:46,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:06:46,879 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:06:46,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:06:47,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:47,080 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 14:06:47,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:06:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -541253963, now seen corresponding path program 2 times [2023-12-02 14:06:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:06:47,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949490963] [2023-12-02 14:06:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:06:47,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:06:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:06:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:47,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:06:47,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949490963] [2023-12-02 14:06:47,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949490963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:06:47,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940721482] [2023-12-02 14:06:47,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:06:47,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:06:47,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:06:47,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:06:47,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec20403d-c04b-411e-9887-865cb827caf3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:06:47,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:06:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:06:47,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 14:06:47,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:06:47,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 14:06:47,786 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:06:47,786 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 14:06:47,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-12-02 14:06:47,844 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 14:06:47,852 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 14:06:47,891 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 14:06:47,943 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 14:06:47,943 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 33 treesize of output 24 [2023-12-02 14:06:47,965 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:06:47,965 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2023-12-02 14:06:47,974 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 19 treesize of output 11 [2023-12-02 14:06:48,184 INFO L349 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2023-12-02 14:06:48,184 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 45 [2023-12-02 14:06:48,191 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:06:48,192 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-12-02 14:06:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:06:48,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:06:48,483 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 164 treesize of output 142 [2023-12-02 14:06:48,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:48,684 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 53 treesize of output 46 [2023-12-02 14:06:48,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:48,702 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 37 treesize of output 35 [2023-12-02 14:06:48,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:48,716 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 19 treesize of output 23 [2023-12-02 14:06:48,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:48,731 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 41 treesize of output 39 [2023-12-02 14:06:49,090 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) .cse7))) (let ((.cse1 (+ .cse2 4)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse7))) (and (or (forall ((v_arrayElimArr_10 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_142| Int)) (or (< |c_ULTIMATE.start_main_~a~0#1.offset| |v_ULTIMATE.start_main_~p~0#1.offset_142|) (< (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_10) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_142|))) 8) (< |v_ULTIMATE.start_main_~p~0#1.offset_142| 0) (not (= (select v_arrayElimArr_10 .cse1) 0)))) (< .cse2 1)) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_142| Int) (v_arrayElimArr_9 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_9) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_142|)))) (or (< |c_ULTIMATE.start_main_~a~0#1.offset| |v_ULTIMATE.start_main_~p~0#1.offset_142|) (< |v_ULTIMATE.start_main_~p~0#1.offset_142| 0) (< (select |c_#length| .cse3) 8) (= .cse0 .cse3) (not (= (select v_arrayElimArr_9 .cse1) 0))))) (forall ((v_arrayElimArr_11 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_142| Int)) (let ((.cse4 (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_11) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_142|))))) (or (< |c_ULTIMATE.start_main_~a~0#1.offset| |v_ULTIMATE.start_main_~p~0#1.offset_142|) (< .cse4 8) (< |v_ULTIMATE.start_main_~p~0#1.offset_142| 0) (not (= (select v_arrayElimArr_11 .cse1) 0)) (< .cse4 (+ 9 .cse2))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_142| Int) (v_arrayElimArr_8 (Array Int Int)) (v_subst_2 Int)) (let ((.cse6 (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_8))) (let ((.cse5 (select (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_142|)))) (or (< |c_ULTIMATE.start_main_~a~0#1.offset| |v_ULTIMATE.start_main_~p~0#1.offset_142|) (< (select |c_#length| .cse5) (+ 8 v_subst_2)) (not (= (select v_arrayElimArr_8 .cse1) 0)) (< v_subst_2 0) (< |v_ULTIMATE.start_main_~p~0#1.offset_142| 0) (= (select (select .cse6 .cse5) (+ 4 v_subst_2)) 0))))))))) is different from false [2023-12-02 14:06:49,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:49,116 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 68 treesize of output 48 [2023-12-02 14:06:49,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:49,157 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 135 treesize of output 168 [2023-12-02 14:06:49,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:06:49,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 111 [2023-12-02 14:07:07,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:07,486 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 51 treesize of output 41 [2023-12-02 14:07:07,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:07,504 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 73 treesize of output 66 [2023-12-02 14:07:07,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:07,523 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 37 treesize of output 33 [2023-12-02 14:07:08,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:08,197 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 47 treesize of output 37 [2023-12-02 14:07:08,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:08,213 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 65 treesize of output 58 [2023-12-02 14:07:08,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:08,228 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 33 treesize of output 29 [2023-12-02 14:07:08,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:08,848 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 24 treesize of output 25 [2023-12-02 14:07:08,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:08,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-12-02 14:07:08,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:07:08,882 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 22 treesize of output 22 [2023-12-02 14:07:18,182 WARN L293 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 777 DAG size of output: 717 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)