./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.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_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/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_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/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_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/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 3747e65f01c1fbd6eb9d2ad39b0ceed8be631bde45acb074c0903963e660faab --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:11:22,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:11:22,647 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 20:11:22,651 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:11:22,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:11:22,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:11:22,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:11:22,675 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:11:22,676 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:11:22,676 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:11:22,677 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:11:22,677 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:11:22,678 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:11:22,678 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 20:11:22,679 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:11:22,679 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:11:22,679 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 20:11:22,680 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 20:11:22,680 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:11:22,681 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 20:11:22,681 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 20:11:22,688 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 20:11:22,689 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 20:11:22,689 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 20:11:22,690 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:11:22,690 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:11:22,690 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:11:22,691 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:11:22,691 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:11:22,692 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 20:11:22,692 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 20:11:22,692 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 20:11:22,693 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:11:22,693 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 20:11:22,693 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 20:11:22,693 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:11:22,694 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:11:22,694 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:11:22,694 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:11:22,694 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:11:22,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:11:22,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:11:22,695 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:11:22,695 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 20:11:22,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:11:22,696 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:11:22,696 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:11:22,696 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:11:22,696 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_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3747e65f01c1fbd6eb9d2ad39b0ceed8be631bde45acb074c0903963e660faab [2023-12-02 20:11:22,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:11:22,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:11:22,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:11:22,948 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:11:22,949 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:11:22,950 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2023-12-02 20:11:25,660 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:11:25,867 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:11:25,868 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2023-12-02 20:11:25,882 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/data/30760652d/440482e310bf4a8380d9689299e1facf/FLAG0d11bb343 [2023-12-02 20:11:25,896 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/data/30760652d/440482e310bf4a8380d9689299e1facf [2023-12-02 20:11:25,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:11:25,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:11:25,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:11:25,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:11:25,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:11:25,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:11:25" (1/1) ... [2023-12-02 20:11:25,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@702963d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:25, skipping insertion in model container [2023-12-02 20:11:25,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:11:25" (1/1) ... [2023-12-02 20:11:25,954 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:11:26,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:11:26,222 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:11:26,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:11:26,285 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:11:26,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26 WrapperNode [2023-12-02 20:11:26,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:11:26,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:11:26,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:11:26,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:11:26,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,306 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,331 INFO L138 Inliner]: procedures = 119, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-12-02 20:11:26,331 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:11:26,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:11:26,332 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:11:26,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:11:26,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,342 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,351 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,357 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,359 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:11:26,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:11:26,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:11:26,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:11:26,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (1/1) ... [2023-12-02 20:11:26,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:11:26,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:26,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:11:26,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:11:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-12-02 20:11:26,421 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-12-02 20:11:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 20:11:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 20:11:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 20:11:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:11:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 20:11:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 20:11:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 20:11:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:11:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:11:26,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:11:26,512 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:11:26,514 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:11:26,554 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-12-02 20:11:26,825 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:11:26,863 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:11:26,864 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 20:11:26,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:11:26 BoogieIcfgContainer [2023-12-02 20:11:26,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:11:26,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:11:26,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:11:26,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:11:26,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:11:25" (1/3) ... [2023-12-02 20:11:26,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac847c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:11:26, skipping insertion in model container [2023-12-02 20:11:26,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:11:26" (2/3) ... [2023-12-02 20:11:26,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac847c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:11:26, skipping insertion in model container [2023-12-02 20:11:26,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:11:26" (3/3) ... [2023-12-02 20:11:26,872 INFO L112 eAbstractionObserver]: Analyzing ICFG list-ext_flag.i [2023-12-02 20:11:26,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:11:26,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2023-12-02 20:11:26,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:11:26,928 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;@485548f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:11:26,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-12-02 20:11:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 96 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 20:11:26,936 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:26,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 20:11:26,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:26,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash 227215, now seen corresponding path program 1 times [2023-12-02 20:11:26,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:26,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356682081] [2023-12-02 20:11:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:26,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:27,135 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 20:11:27,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356682081] [2023-12-02 20:11:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356682081] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:27,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:27,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 20:11:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411195823] [2023-12-02 20:11:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:11:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:11:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:27,175 INFO L87 Difference]: Start difference. First operand has 98 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 96 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:27,286 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2023-12-02 20:11:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:11:27,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 20:11:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:27,294 INFO L225 Difference]: With dead ends: 115 [2023-12-02 20:11:27,294 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 20:11:27,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:27,299 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 92 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:27,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 74 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 20:11:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2023-12-02 20:11:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 46 states have (on average 2.108695652173913) internal successors, (97), 89 states have internal predecessors, (97), 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 20:11:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2023-12-02 20:11:27,331 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 3 [2023-12-02 20:11:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:27,332 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2023-12-02 20:11:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2023-12-02 20:11:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 20:11:27,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:27,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 20:11:27,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 20:11:27,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:27,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash 227216, now seen corresponding path program 1 times [2023-12-02 20:11:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:27,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224170045] [2023-12-02 20:11:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:27,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:27,425 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 20:11:27,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224170045] [2023-12-02 20:11:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224170045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:27,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:27,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 20:11:27,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965669343] [2023-12-02 20:11:27,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:27,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:11:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:11:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:27,430 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:27,553 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2023-12-02 20:11:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:11:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 20:11:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:27,556 INFO L225 Difference]: With dead ends: 168 [2023-12-02 20:11:27,556 INFO L226 Difference]: Without dead ends: 168 [2023-12-02 20:11:27,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:27,558 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 86 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:27,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 119 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-12-02 20:11:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 89. [2023-12-02 20:11:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2023-12-02 20:11:27,570 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 3 [2023-12-02 20:11:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:27,571 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2023-12-02 20:11:27,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2023-12-02 20:11:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 20:11:27,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:27,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 20:11:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 20:11:27,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:27,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1815048819, now seen corresponding path program 1 times [2023-12-02 20:11:27,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:27,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286207240] [2023-12-02 20:11:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:27,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:27,642 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 20:11:27,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286207240] [2023-12-02 20:11:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286207240] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:27,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:27,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206294281] [2023-12-02 20:11:27,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:27,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:11:27,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:27,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:11:27,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:27,646 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:27,751 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2023-12-02 20:11:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:11:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 20:11:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:27,753 INFO L225 Difference]: With dead ends: 83 [2023-12-02 20:11:27,753 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 20:11:27,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:27,755 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:27,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 45 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 20:11:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2023-12-02 20:11:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 79 states have internal predecessors, (91), 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 20:11:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-12-02 20:11:27,764 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 6 [2023-12-02 20:11:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:27,764 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-12-02 20:11:27,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-12-02 20:11:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 20:11:27,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:27,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 20:11:27,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 20:11:27,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:27,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1815048818, now seen corresponding path program 1 times [2023-12-02 20:11:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564843031] [2023-12-02 20:11:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:27,898 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 20:11:27,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:27,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564843031] [2023-12-02 20:11:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564843031] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:27,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:27,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087865806] [2023-12-02 20:11:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:27,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:11:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:11:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:11:27,901 INFO L87 Difference]: Start difference. First operand 80 states and 91 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 20:11:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:28,119 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2023-12-02 20:11:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:11:28,119 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 20:11:28,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:28,121 INFO L225 Difference]: With dead ends: 167 [2023-12-02 20:11:28,121 INFO L226 Difference]: Without dead ends: 167 [2023-12-02 20:11:28,122 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 20:11:28,123 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 149 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:28,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 104 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:11:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-02 20:11:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 111. [2023-12-02 20:11:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.7195121951219512) internal successors, (141), 110 states have internal predecessors, (141), 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 20:11:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2023-12-02 20:11:28,134 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 6 [2023-12-02 20:11:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:28,134 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2023-12-02 20:11:28,134 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 20:11:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2023-12-02 20:11:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 20:11:28,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:28,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:28,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 20:11:28,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:28,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash -431934337, now seen corresponding path program 1 times [2023-12-02 20:11:28,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:28,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704712384] [2023-12-02 20:11:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:28,196 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 20:11:28,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:28,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704712384] [2023-12-02 20:11:28,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704712384] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:28,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:28,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:11:28,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575155023] [2023-12-02 20:11:28,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:28,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:11:28,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:28,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:11:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:11:28,199 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:28,333 INFO L93 Difference]: Finished difference Result 162 states and 195 transitions. [2023-12-02 20:11:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 20:11:28,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 20:11:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:28,336 INFO L225 Difference]: With dead ends: 162 [2023-12-02 20:11:28,336 INFO L226 Difference]: Without dead ends: 162 [2023-12-02 20:11:28,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 20:11:28,338 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 164 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:28,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 70 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-02 20:11:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 120. [2023-12-02 20:11:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 119 states have internal predecessors, (156), 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 20:11:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2023-12-02 20:11:28,348 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 7 [2023-12-02 20:11:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:28,348 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2023-12-02 20:11:28,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2023-12-02 20:11:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 20:11:28,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:28,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:28,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 20:11:28,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:28,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1531243839, now seen corresponding path program 1 times [2023-12-02 20:11:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833267904] [2023-12-02 20:11:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:28,559 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 20:11:28,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:28,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833267904] [2023-12-02 20:11:28,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833267904] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:28,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:28,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 20:11:28,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223866409] [2023-12-02 20:11:28,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:28,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:28,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:11:28,561 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 6 states, 5 states have (on average 2.4) 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 20:11:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:28,775 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2023-12-02 20:11:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:11:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) 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 20:11:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:28,777 INFO L225 Difference]: With dead ends: 171 [2023-12-02 20:11:28,777 INFO L226 Difference]: Without dead ends: 171 [2023-12-02 20:11:28,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-02 20:11:28,778 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 194 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:28,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 99 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:11:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-02 20:11:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2023-12-02 20:11:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 123 states have internal predecessors, (160), 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 20:11:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2023-12-02 20:11:28,787 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 12 [2023-12-02 20:11:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:28,787 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2023-12-02 20:11:28,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) 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 20:11:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2023-12-02 20:11:28,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 20:11:28,788 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:28,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:28,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 20:11:28,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:28,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:28,789 INFO L85 PathProgramCache]: Analyzing trace with hash -692198341, now seen corresponding path program 1 times [2023-12-02 20:11:28,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:28,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944619057] [2023-12-02 20:11:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:28,887 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 20:11:28,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944619057] [2023-12-02 20:11:28,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944619057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:28,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:28,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:11:28,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803000547] [2023-12-02 20:11:28,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:28,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:28,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:11:28,889 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:28,977 INFO L93 Difference]: Finished difference Result 156 states and 192 transitions. [2023-12-02 20:11:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:11:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 20:11:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:28,979 INFO L225 Difference]: With dead ends: 156 [2023-12-02 20:11:28,979 INFO L226 Difference]: Without dead ends: 156 [2023-12-02 20:11:28,979 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 20:11:28,980 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:28,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 213 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-02 20:11:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2023-12-02 20:11:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 123 states have internal predecessors, (159), 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 20:11:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2023-12-02 20:11:28,987 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 13 [2023-12-02 20:11:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:28,988 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2023-12-02 20:11:28,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2023-12-02 20:11:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:11:28,989 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:28,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 20:11:28,989 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:28,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash 17022880, now seen corresponding path program 1 times [2023-12-02 20:11:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:28,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606401082] [2023-12-02 20:11:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:29,048 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 20:11:29,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606401082] [2023-12-02 20:11:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606401082] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:29,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:29,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:29,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161309252] [2023-12-02 20:11:29,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:29,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:11:29,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:29,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:11:29,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:11:29,051 INFO L87 Difference]: Start difference. First operand 124 states and 159 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 20:11:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:29,143 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2023-12-02 20:11:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:11:29,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2023-12-02 20:11:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:29,145 INFO L225 Difference]: With dead ends: 147 [2023-12-02 20:11:29,145 INFO L226 Difference]: Without dead ends: 147 [2023-12-02 20:11:29,145 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 20:11:29,146 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 161 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:29,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 81 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-02 20:11:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 127. [2023-12-02 20:11:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.6565656565656566) internal successors, (164), 126 states have internal predecessors, (164), 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 20:11:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2023-12-02 20:11:29,152 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 14 [2023-12-02 20:11:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:29,153 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2023-12-02 20:11:29,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 20:11:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2023-12-02 20:11:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:11:29,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:29,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:29,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 20:11:29,154 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:29,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash 852848975, now seen corresponding path program 1 times [2023-12-02 20:11:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:29,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012611744] [2023-12-02 20:11:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:29,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:29,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012611744] [2023-12-02 20:11:29,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012611744] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:29,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:29,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 20:11:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180577137] [2023-12-02 20:11:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:29,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:11:29,329 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 20:11:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:29,551 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2023-12-02 20:11:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:11:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2023-12-02 20:11:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:29,552 INFO L225 Difference]: With dead ends: 136 [2023-12-02 20:11:29,553 INFO L226 Difference]: Without dead ends: 136 [2023-12-02 20:11:29,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-02 20:11:29,554 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 199 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:29,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 114 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:11:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-02 20:11:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 107. [2023-12-02 20:11:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.6075949367088607) internal successors, (127), 106 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2023-12-02 20:11:29,558 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 14 [2023-12-02 20:11:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:29,559 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2023-12-02 20:11:29,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 20:11:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2023-12-02 20:11:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 20:11:29,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:29,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 20:11:29,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:29,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash 527709453, now seen corresponding path program 1 times [2023-12-02 20:11:29,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:29,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373654472] [2023-12-02 20:11:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:29,626 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 20:11:29,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373654472] [2023-12-02 20:11:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373654472] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:29,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:29,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311331829] [2023-12-02 20:11:29,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:29,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:11:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:11:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:11:29,628 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:29,737 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2023-12-02 20:11:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:11:29,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 20:11:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:29,739 INFO L225 Difference]: With dead ends: 131 [2023-12-02 20:11:29,739 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 20:11:29,739 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 20:11:29,740 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 166 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:29,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 67 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 20:11:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2023-12-02 20:11:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 81 states have (on average 1.5802469135802468) internal successors, (128), 107 states have internal predecessors, (128), 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 20:11:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2023-12-02 20:11:29,744 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 15 [2023-12-02 20:11:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:29,745 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2023-12-02 20:11:29,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2023-12-02 20:11:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 20:11:29,746 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:29,746 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 20:11:29,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:29,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 683794093, now seen corresponding path program 1 times [2023-12-02 20:11:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:29,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512063491] [2023-12-02 20:11:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:29,847 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 20:11:29,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:29,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512063491] [2023-12-02 20:11:29,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512063491] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:29,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:29,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 20:11:29,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545274893] [2023-12-02 20:11:29,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:29,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 20:11:29,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 20:11:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 20:11:29,849 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 20:11:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:30,007 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2023-12-02 20:11:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:11:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 20:11:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:30,008 INFO L225 Difference]: With dead ends: 114 [2023-12-02 20:11:30,008 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 20:11:30,008 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 20:11:30,009 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 116 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:30,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 101 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 20:11:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2023-12-02 20:11:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.5555555555555556) internal successors, (126), 105 states have internal predecessors, (126), 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 20:11:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2023-12-02 20:11:30,013 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 16 [2023-12-02 20:11:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:30,013 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2023-12-02 20:11:30,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 20:11:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2023-12-02 20:11:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 20:11:30,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:30,014 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 20:11:30,014 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:30,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash 683794094, now seen corresponding path program 1 times [2023-12-02 20:11:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:30,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544714101] [2023-12-02 20:11:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:30,173 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 20:11:30,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:30,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544714101] [2023-12-02 20:11:30,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544714101] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:30,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:30,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 20:11:30,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811862650] [2023-12-02 20:11:30,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:30,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 20:11:30,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 20:11:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 20:11:30,175 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 20:11:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:30,400 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2023-12-02 20:11:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:11:30,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 20:11:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:30,401 INFO L225 Difference]: With dead ends: 110 [2023-12-02 20:11:30,401 INFO L226 Difference]: Without dead ends: 110 [2023-12-02 20:11:30,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:11:30,402 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 66 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:30,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 161 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:11:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-02 20:11:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2023-12-02 20:11:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.5138888888888888) internal successors, (109), 89 states have internal predecessors, (109), 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 20:11:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2023-12-02 20:11:30,405 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 16 [2023-12-02 20:11:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:30,405 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2023-12-02 20:11:30,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 20:11:30,406 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2023-12-02 20:11:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 20:11:30,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:30,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:30,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 20:11:30,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:30,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash -277215393, now seen corresponding path program 1 times [2023-12-02 20:11:30,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:30,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663707837] [2023-12-02 20:11:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:30,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:30,479 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 20:11:30,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:30,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663707837] [2023-12-02 20:11:30,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663707837] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:11:30,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199759078] [2023-12-02 20:11:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:30,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:30,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:30,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:30,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 20:11:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:30,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 20:11:30,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:30,622 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 20:11:30,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:30,665 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 20:11:30,666 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 12 treesize of output 11 [2023-12-02 20:11:30,685 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 20:11:30,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199759078] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674648991] [2023-12-02 20:11:30,701 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 20:11:30,701 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:11:30,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:11:30,708 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:11:30,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:11:35,670 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:11:37,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3226#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_51| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_82| Int) (|v_#memory_$Pointer$.base_51| (Array Int (Array Int Int))) (|v_#memory_int_49| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_101| Int)) (and (= (store |v_#memory_$Pointer$.base_51| |v_ULTIMATE.start_main_~p~0#1.base_101| (store (select |v_#memory_$Pointer$.base_51| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82|))) |#memory_$Pointer$.base|) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_82|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_101|) 1) (= (store |v_#memory_int_49| |v_ULTIMATE.start_main_~p~0#1.base_101| (store (select |v_#memory_int_49| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82| 3)) |#memory_int|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_51| |v_ULTIMATE.start_main_~p~0#1.base_101| (store (select |v_#memory_$Pointer$.offset_51| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_101|) |v_ULTIMATE.start_main_~p~0#1.offset_82|)))) (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_82| 4) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_101|)))) (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0))' at error location [2023-12-02 20:11:37,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:11:37,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:11:37,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-12-02 20:11:37,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718286668] [2023-12-02 20:11:37,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:11:37,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:37,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:37,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:37,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=268, Unknown=2, NotChecked=0, Total=342 [2023-12-02 20:11:37,227 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 20:11:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:37,354 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2023-12-02 20:11:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:11:37,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 17 [2023-12-02 20:11:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:37,355 INFO L225 Difference]: With dead ends: 122 [2023-12-02 20:11:37,355 INFO L226 Difference]: Without dead ends: 122 [2023-12-02 20:11:37,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=77, Invalid=301, Unknown=2, NotChecked=0, Total=380 [2023-12-02 20:11:37,357 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:37,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 71 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-02 20:11:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2023-12-02 20:11:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.462686567164179) internal successors, (98), 83 states have internal predecessors, (98), 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 20:11:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2023-12-02 20:11:37,360 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 17 [2023-12-02 20:11:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:37,360 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2023-12-02 20:11:37,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 20:11:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2023-12-02 20:11:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 20:11:37,361 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:37,361 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:37,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:37,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 20:11:37,562 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:37,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:37,563 INFO L85 PathProgramCache]: Analyzing trace with hash -277215392, now seen corresponding path program 1 times [2023-12-02 20:11:37,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:37,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853478039] [2023-12-02 20:11:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:37,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:37,718 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 20:11:37,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853478039] [2023-12-02 20:11:37,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853478039] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:11:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445119223] [2023-12-02 20:11:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:37,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:37,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:37,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:37,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 20:11:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:37,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:11:37,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:37,933 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 20:11:37,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:37,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:11:37,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2023-12-02 20:11:38,113 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 20:11:38,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445119223] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:38,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30290489] [2023-12-02 20:11:38,116 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 20:11:38,116 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:11:38,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:11:38,116 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:11:38,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:11:42,849 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:11:44,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3559#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_main_~p~0#1.base|) 3) (<= 0 |ULTIMATE.start_main_~i~0#1|) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_109| Int) (|v_#memory_$Pointer$.base_70| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_90| Int) (|v_#memory_int_68| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_70| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_70| |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select |v_#memory_$Pointer$.base_70| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90|))) |#memory_$Pointer$.base|) (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_90| 4) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_109|)) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_109|) 1) (= (store |v_#memory_int_68| |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select |v_#memory_int_68| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90| 3)) |#memory_int|) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_90|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_70| |v_ULTIMATE.start_main_~p~0#1.base_109| (store (select |v_#memory_$Pointer$.offset_70| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_109|) |v_ULTIMATE.start_main_~p~0#1.offset_90|)))))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0))' at error location [2023-12-02 20:11:44,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:11:44,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:11:44,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-12-02 20:11:44,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704935370] [2023-12-02 20:11:44,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:11:44,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 20:11:44,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 20:11:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=665, Unknown=2, NotChecked=0, Total=812 [2023-12-02 20:11:44,290 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:44,549 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2023-12-02 20:11:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 20:11:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 20:11:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:44,551 INFO L225 Difference]: With dead ends: 108 [2023-12-02 20:11:44,551 INFO L226 Difference]: Without dead ends: 108 [2023-12-02 20:11:44,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=170, Invalid=758, Unknown=2, NotChecked=0, Total=930 [2023-12-02 20:11:44,552 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 292 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:44,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 190 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:11:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-02 20:11:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2023-12-02 20:11:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 81 states have internal predecessors, (95), 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 20:11:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-12-02 20:11:44,555 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 17 [2023-12-02 20:11:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:44,556 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-12-02 20:11:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:11:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-12-02 20:11:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:11:44,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:44,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:44,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 20:11:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 20:11:44,762 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:44,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1412185872, now seen corresponding path program 1 times [2023-12-02 20:11:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634722367] [2023-12-02 20:11:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:44,887 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 20:11:44,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:44,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634722367] [2023-12-02 20:11:44,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634722367] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:44,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:44,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:11:44,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784707701] [2023-12-02 20:11:44,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:44,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 20:11:44,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:44,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 20:11:44,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 20:11:44,889 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 20:11:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:45,032 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2023-12-02 20:11:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:11:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 18 [2023-12-02 20:11:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:45,034 INFO L225 Difference]: With dead ends: 123 [2023-12-02 20:11:45,034 INFO L226 Difference]: Without dead ends: 113 [2023-12-02 20:11:45,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:11:45,035 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 75 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:45,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 146 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-02 20:11:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2023-12-02 20:11:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 86 states have internal predecessors, (100), 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 20:11:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2023-12-02 20:11:45,039 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 18 [2023-12-02 20:11:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:45,039 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2023-12-02 20:11:45,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 20:11:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2023-12-02 20:11:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 20:11:45,040 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:45,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:45,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 20:11:45,041 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:45,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1648964890, now seen corresponding path program 1 times [2023-12-02 20:11:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691787543] [2023-12-02 20:11:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:45,260 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 20:11:45,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:45,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691787543] [2023-12-02 20:11:45,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691787543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:45,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:45,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 20:11:45,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82761916] [2023-12-02 20:11:45,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:45,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:45,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:11:45,263 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20:11:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:45,380 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2023-12-02 20:11:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 20:11:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20 [2023-12-02 20:11:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:45,381 INFO L225 Difference]: With dead ends: 93 [2023-12-02 20:11:45,381 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 20:11:45,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:11:45,382 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 22 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:45,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 171 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 20:11:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2023-12-02 20:11:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.390625) internal successors, (89), 76 states have internal predecessors, (89), 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 20:11:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2023-12-02 20:11:45,386 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 20 [2023-12-02 20:11:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:45,386 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2023-12-02 20:11:45,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20:11:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2023-12-02 20:11:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 20:11:45,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:45,387 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:45,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 20:11:45,387 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:45,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:45,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1006964507, now seen corresponding path program 1 times [2023-12-02 20:11:45,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:45,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983307485] [2023-12-02 20:11:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:45,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:45,488 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 20:11:45,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:45,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983307485] [2023-12-02 20:11:45,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983307485] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:11:45,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773091466] [2023-12-02 20:11:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:45,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:45,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:45,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:45,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 20:11:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:45,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:11:45,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:45,635 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 20:11:45,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:45,703 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 20:11:45,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773091466] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:45,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527950874] [2023-12-02 20:11:45,705 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:11:45,705 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:11:45,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:11:45,705 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:11:45,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:11:50,353 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:11:52,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4312#(and (<= 21 |ULTIMATE.start_main_~i~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_118| Int) (|v_#memory_$Pointer$.base_92| (Array Int (Array Int Int))) (|v_#memory_int_90| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_99| Int) (|v_#memory_$Pointer$.offset_92| (Array Int (Array Int Int)))) (and (<= (+ |v_ULTIMATE.start_main_~p~0#1.offset_99| 4) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_118|)) (= (store |v_#memory_$Pointer$.base_92| |v_ULTIMATE.start_main_~p~0#1.base_118| (store (select |v_#memory_$Pointer$.base_92| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99|))) |#memory_$Pointer$.base|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_118|) 1) (= |#memory_int| (store |v_#memory_int_90| |v_ULTIMATE.start_main_~p~0#1.base_118| (store (select |v_#memory_int_90| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99| 3))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_92| |v_ULTIMATE.start_main_~p~0#1.base_118| (store (select |v_#memory_$Pointer$.offset_92| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_118|) |v_ULTIMATE.start_main_~p~0#1.offset_99|)))) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_99|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3))' at error location [2023-12-02 20:11:52,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:11:52,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:11:52,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-12-02 20:11:52,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96568310] [2023-12-02 20:11:52,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:11:52,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 20:11:52,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:11:52,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 20:11:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=645, Unknown=2, NotChecked=0, Total=756 [2023-12-02 20:11:52,281 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 20:11:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:52,501 INFO L93 Difference]: Finished difference Result 248 states and 287 transitions. [2023-12-02 20:11:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 20:11:52,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) Word has length 23 [2023-12-02 20:11:52,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:52,503 INFO L225 Difference]: With dead ends: 248 [2023-12-02 20:11:52,503 INFO L226 Difference]: Without dead ends: 248 [2023-12-02 20:11:52,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=166, Invalid=954, Unknown=2, NotChecked=0, Total=1122 [2023-12-02 20:11:52,505 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 241 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:52,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 381 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-12-02 20:11:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 146. [2023-12-02 20:11:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 145 states have internal predecessors, (184), 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 20:11:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2023-12-02 20:11:52,511 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 23 [2023-12-02 20:11:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:52,512 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2023-12-02 20:11:52,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 20:11:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2023-12-02 20:11:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 20:11:52,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:52,513 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:52,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 20:11:52,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 20:11:52,718 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:11:52,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1987289711, now seen corresponding path program 1 times [2023-12-02 20:11:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:11:52,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607881493] [2023-12-02 20:11:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:52,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:11:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:52,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:11:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607881493] [2023-12-02 20:11:52,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607881493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:11:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390245045] [2023-12-02 20:11:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:52,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:52,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:52,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:52,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 20:11:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:53,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 20:11:53,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:53,248 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 20:11:53,248 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 20:11:53,312 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 20:11:53,462 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 20:11:53,462 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 42 treesize of output 41 [2023-12-02 20:11:53,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:11:53,600 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 31 treesize of output 13 [2023-12-02 20:11:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:53,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:53,645 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_474) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) 1)) is different from false [2023-12-02 20:11:53,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:11:53,691 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 20:11:53,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:11:53,701 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 20:11:53,716 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 5 [2023-12-02 20:11:54,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:11:54,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 150 treesize of output 748 [2023-12-02 20:14:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 20:14:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390245045] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610835890] [2023-12-02 20:14:31,047 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:14:31,047 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:14:31,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:14:31,047 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:14:31,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:14:35,769 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:14:37,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4895#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 20:14:37,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:14:37,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:14:37,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-12-02 20:14:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895664601] [2023-12-02 20:14:37,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:14:37,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 20:14:37,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:14:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 20:14:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1273, Unknown=8, NotChecked=74, Total=1560 [2023-12-02 20:14:37,414 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 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 20:14:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:38,180 INFO L93 Difference]: Finished difference Result 203 states and 237 transitions. [2023-12-02 20:14:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 20:14:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 20:14:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:38,182 INFO L225 Difference]: With dead ends: 203 [2023-12-02 20:14:38,182 INFO L226 Difference]: Without dead ends: 203 [2023-12-02 20:14:38,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=296, Invalid=1679, Unknown=9, NotChecked=86, Total=2070 [2023-12-02 20:14:38,184 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 503 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:38,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 394 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 652 Invalid, 0 Unknown, 191 Unchecked, 0.6s Time] [2023-12-02 20:14:38,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-12-02 20:14:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 158. [2023-12-02 20:14:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 145 states have (on average 1.3655172413793104) internal successors, (198), 157 states have internal predecessors, (198), 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 20:14:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 198 transitions. [2023-12-02 20:14:38,189 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 198 transitions. Word has length 24 [2023-12-02 20:14:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:38,189 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 198 transitions. [2023-12-02 20:14:38,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 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 20:14:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 198 transitions. [2023-12-02 20:14:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 20:14:38,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:38,191 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:38,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 20:14:38,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 20:14:38,396 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:14:38,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1987289712, now seen corresponding path program 1 times [2023-12-02 20:14:38,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:14:38,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934996976] [2023-12-02 20:14:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:14:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:38,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:14:38,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934996976] [2023-12-02 20:14:38,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934996976] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:14:38,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666364383] [2023-12-02 20:14:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:38,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:14:38,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:14:38,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:14:38,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 20:14:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:38,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 20:14:38,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:39,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 20:14:39,015 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:14:39,015 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 20:14:39,074 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 20:14:39,077 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 20:14:39,210 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:14:39,210 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 20:14:39,215 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 20:14:39,299 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 20:14:39,303 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 20:14:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:39,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:39,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:39,650 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 20:14:39,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:39,659 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 20:14:39,664 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 20:14:39,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:39,698 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 20:14:39,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:39,705 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 20:14:39,707 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:14:39,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:14:39,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:14:39,711 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 20:14:39,714 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:14:39,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:14:39,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:14:39,719 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 20:14:40,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:40,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 126 [2023-12-02 20:14:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:40,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666364383] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:40,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039446424] [2023-12-02 20:14:40,270 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:14:40,270 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:14:40,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:14:40,270 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:14:40,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:14:44,848 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:14:47,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5451#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 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 20:14:47,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:14:47,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:14:47,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 27 [2023-12-02 20:14:47,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963276988] [2023-12-02 20:14:47,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:14:47,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 20:14:47,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:14:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 20:14:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1688, Unknown=8, NotChecked=0, Total=1892 [2023-12-02 20:14:47,081 INFO L87 Difference]: Start difference. First operand 158 states and 198 transitions. Second operand has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 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 20:14:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:48,163 INFO L93 Difference]: Finished difference Result 223 states and 256 transitions. [2023-12-02 20:14:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 20:14:48,163 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 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) Word has length 24 [2023-12-02 20:14:48,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:48,164 INFO L225 Difference]: With dead ends: 223 [2023-12-02 20:14:48,164 INFO L226 Difference]: Without dead ends: 223 [2023-12-02 20:14:48,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=434, Invalid=2864, Unknown=8, NotChecked=0, Total=3306 [2023-12-02 20:14:48,166 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 762 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:48,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 398 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 20:14:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-12-02 20:14:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 155. [2023-12-02 20:14:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 142 states have (on average 1.3309859154929577) internal successors, (189), 154 states have internal predecessors, (189), 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 20:14:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 189 transitions. [2023-12-02 20:14:48,170 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 189 transitions. Word has length 24 [2023-12-02 20:14:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:48,170 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 189 transitions. [2023-12-02 20:14:48,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 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 20:14:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 189 transitions. [2023-12-02 20:14:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 20:14:48,171 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:48,171 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:48,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 20:14:48,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:14:48,372 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:14:48,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1476356842, now seen corresponding path program 1 times [2023-12-02 20:14:48,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:14:48,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745972080] [2023-12-02 20:14:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:48,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:14:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:48,765 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 20:14:48,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:14:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745972080] [2023-12-02 20:14:48,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745972080] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:14:48,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20402913] [2023-12-02 20:14:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:48,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:14:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:14:48,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:14:48,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 20:14:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:48,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 20:14:48,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:48,923 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 20:14:48,960 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:14:48,960 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 20:14:49,002 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 20:14:49,005 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 20:14:49,039 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 20:14:49,071 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 20:14:49,087 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 20:14:49,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:49,107 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_622) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-12-02 20:14:49,142 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int)) (v_ArrVal_619 (Array Int Int))) (or (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_619) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_622) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (= v_ArrVal_619 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_619 .cse0))))))) is different from false [2023-12-02 20:14:49,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:49,194 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 70 treesize of output 74 [2023-12-02 20:14:49,202 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 58 treesize of output 54 [2023-12-02 20:14:49,232 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 89 treesize of output 85 [2023-12-02 20:14:49,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:49,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 74 [2023-12-02 20:14:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 20:14:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20402913] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951900178] [2023-12-02 20:14:49,477 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 20:14:49,477 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:14:49,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:14:49,478 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:14:49,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:14:49,954 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:14:56,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6043#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 4) 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 2)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (<= 8 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~p~0#1.offset_132| Int) (|v_#memory_$Pointer$.offset_151| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_158| Int) (|v_#memory_int_150| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_154| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_150| |v_ULTIMATE.start_main_~p~0#1.base_158| (store (select |v_#memory_int_150| |v_ULTIMATE.start_main_~p~0#1.base_158|) |v_ULTIMATE.start_main_~p~0#1.offset_132| 3))) (or (and (= |ULTIMATE.start_main_~i~0#1| 0) (= |v_ULTIMATE.start_main_~p~0#1.offset_132| 0)) (= |ULTIMATE.start_main_~t~0#1.offset| 0)) (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_132|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_158|)) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_132|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_151| |v_ULTIMATE.start_main_~p~0#1.base_158| (store (select |v_#memory_$Pointer$.offset_151| |v_ULTIMATE.start_main_~p~0#1.base_158|) |v_ULTIMATE.start_main_~p~0#1.offset_132| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_158|) |v_ULTIMATE.start_main_~p~0#1.offset_132|)))) (= (store |v_#memory_$Pointer$.base_154| |v_ULTIMATE.start_main_~p~0#1.base_158| (store (select |v_#memory_$Pointer$.base_154| |v_ULTIMATE.start_main_~p~0#1.base_158|) |v_ULTIMATE.start_main_~p~0#1.offset_132| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_158|) |v_ULTIMATE.start_main_~p~0#1.offset_132|))) |#memory_$Pointer$.base|) (= 1 (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_158|)))))' at error location [2023-12-02 20:14:56,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:14:56,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:14:56,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2023-12-02 20:14:56,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376058554] [2023-12-02 20:14:56,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:14:56,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 20:14:56,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:14:56,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 20:14:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1383, Unknown=8, NotChecked=158, Total=1806 [2023-12-02 20:14:56,272 INFO L87 Difference]: Start difference. First operand 155 states and 189 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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 20:14:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:56,930 INFO L93 Difference]: Finished difference Result 246 states and 287 transitions. [2023-12-02 20:14:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 20:14:56,931 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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 25 [2023-12-02 20:14:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:56,932 INFO L225 Difference]: With dead ends: 246 [2023-12-02 20:14:56,932 INFO L226 Difference]: Without dead ends: 246 [2023-12-02 20:14:56,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=8, NotChecked=186, Total=2450 [2023-12-02 20:14:56,933 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 408 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:56,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 403 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 630 Invalid, 3 Unknown, 341 Unchecked, 0.4s Time] [2023-12-02 20:14:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-12-02 20:14:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 168. [2023-12-02 20:14:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 155 states have (on average 1.3225806451612903) internal successors, (205), 167 states have internal predecessors, (205), 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 20:14:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 205 transitions. [2023-12-02 20:14:56,943 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 205 transitions. Word has length 25 [2023-12-02 20:14:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:56,943 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 205 transitions. [2023-12-02 20:14:56,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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 20:14:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 205 transitions. [2023-12-02 20:14:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 20:14:56,944 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:56,944 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:56,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 20:14:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:14:57,145 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:14:57,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1180532212, now seen corresponding path program 1 times [2023-12-02 20:14:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:14:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497501451] [2023-12-02 20:14:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:14:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:57,543 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 20:14:57,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:14:57,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497501451] [2023-12-02 20:14:57,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497501451] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:14:57,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368119189] [2023-12-02 20:14:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:57,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:14:57,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:14:57,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:14:57,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 20:14:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:57,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 20:14:57,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:57,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:14:57,812 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 20:14:57,831 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:14:57,831 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 20:14:57,878 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 20:14:57,886 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 20:14:57,918 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 20:14:57,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 20:14:57,978 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 20:14:57,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:58,018 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_697 (Array Int Int))) (= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8)) v_ArrVal_697) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) is different from false [2023-12-02 20:14:58,028 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_695 (Array Int Int)) (v_ArrVal_697 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_695) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_697) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_695 .cse0))) v_ArrVal_695)))) is different from false [2023-12-02 20:14:58,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:14:58,267 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 85 treesize of output 89 [2023-12-02 20:14:58,276 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 71 treesize of output 63 [2023-12-02 20:14:58,288 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 20:14:58,288 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 20:14:58,318 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 242 treesize of output 234 [2023-12-02 20:14:58,361 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 20:14:58,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368119189] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:58,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359730871] [2023-12-02 20:14:58,363 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 20:14:58,363 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:14:58,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:14:58,363 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:14:58,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:14:58,837 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:15:03,450 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6664#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 4) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 1)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (<= 8 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (exists ((|v_#memory_$Pointer$.base_174| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_140| Int) (|v_#memory_$Pointer$.offset_170| (Array Int (Array Int Int))) (|v_#memory_int_173| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_168| Int)) (and (= (store |v_#memory_int_173| |v_ULTIMATE.start_main_~p~0#1.base_168| (store (select |v_#memory_int_173| |v_ULTIMATE.start_main_~p~0#1.base_168|) |v_ULTIMATE.start_main_~p~0#1.offset_140| 3)) |#memory_int|) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_140|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_174| |v_ULTIMATE.start_main_~p~0#1.base_168| (store (select |v_#memory_$Pointer$.base_174| |v_ULTIMATE.start_main_~p~0#1.base_168|) |v_ULTIMATE.start_main_~p~0#1.offset_140| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_168|) |v_ULTIMATE.start_main_~p~0#1.offset_140|)))) (or (and (= |ULTIMATE.start_main_~i~0#1| 0) (= |v_ULTIMATE.start_main_~p~0#1.offset_140| 0)) (= |ULTIMATE.start_main_~t~0#1.offset| 0)) (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_140|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_168|)) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_170| |v_ULTIMATE.start_main_~p~0#1.base_168| (store (select |v_#memory_$Pointer$.offset_170| |v_ULTIMATE.start_main_~p~0#1.base_168|) |v_ULTIMATE.start_main_~p~0#1.offset_140| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_168|) |v_ULTIMATE.start_main_~p~0#1.offset_140|)))) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_168|) 1))))' at error location [2023-12-02 20:15:03,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:15:03,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:15:03,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 31 [2023-12-02 20:15:03,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13640706] [2023-12-02 20:15:03,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:15:03,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 20:15:03,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:15:03,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 20:15:03,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1767, Unknown=12, NotChecked=178, Total=2256 [2023-12-02 20:15:03,453 INFO L87 Difference]: Start difference. First operand 168 states and 205 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 20:15:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:04,406 INFO L93 Difference]: Finished difference Result 224 states and 264 transitions. [2023-12-02 20:15:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 20:15:04,407 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) Word has length 25 [2023-12-02 20:15:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:04,408 INFO L225 Difference]: With dead ends: 224 [2023-12-02 20:15:04,408 INFO L226 Difference]: Without dead ends: 224 [2023-12-02 20:15:04,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=410, Invalid=2238, Unknown=12, NotChecked=202, Total=2862 [2023-12-02 20:15:04,410 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 440 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 60 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:04,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 365 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 633 Invalid, 4 Unknown, 313 Unchecked, 0.7s Time] [2023-12-02 20:15:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-12-02 20:15:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2023-12-02 20:15:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 155 states have (on average 1.3161290322580645) internal successors, (204), 167 states have internal predecessors, (204), 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 20:15:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions. [2023-12-02 20:15:04,416 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 25 [2023-12-02 20:15:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:04,416 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 204 transitions. [2023-12-02 20:15:04,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 20:15:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions. [2023-12-02 20:15:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 20:15:04,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:04,417 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:04,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 20:15:04,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 20:15:04,617 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:15:04,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash -304829878, now seen corresponding path program 1 times [2023-12-02 20:15:04,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:15:04,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755839741] [2023-12-02 20:15:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:04,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:15:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:05,086 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 20:15:05,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:15:05,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755839741] [2023-12-02 20:15:05,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755839741] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:15:05,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141685208] [2023-12-02 20:15:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:05,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:05,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:15:05,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:15:05,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 20:15:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:05,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 20:15:05,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:05,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:15:05,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 20:15:05,397 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:15:05,397 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 20:15:05,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 20:15:05,449 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 20:15:05,488 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 20:15:05,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-12-02 20:15:05,551 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 20:15:05,553 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 20:15:05,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:05,561 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_772 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_772) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0))) is different from false [2023-12-02 20:15:05,602 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int)) (v_ArrVal_772 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_769) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_772) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) (not (= v_ArrVal_769 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_769 .cse0))))))) is different from false [2023-12-02 20:15:05,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:15:05,813 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 94 treesize of output 98 [2023-12-02 20:15:05,820 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 62 treesize of output 54 [2023-12-02 20:15:05,842 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 20:15:05,842 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 20:15:05,880 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 514 treesize of output 498 [2023-12-02 20:15:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 20:15:05,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141685208] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:05,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250701926] [2023-12-02 20:15:05,937 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 20:15:05,937 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:15:05,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:15:05,937 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:15:05,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:15:10,453 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:15:13,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7260#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 4) 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_194| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_178| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_148| Int) (|v_#memory_$Pointer$.offset_189| (Array Int (Array Int Int))) (|v_#memory_int_196| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_196| |v_ULTIMATE.start_main_~p~0#1.base_178| (store (select |v_#memory_int_196| |v_ULTIMATE.start_main_~p~0#1.base_178|) |v_ULTIMATE.start_main_~p~0#1.offset_148| 3))) (= (store |v_#memory_$Pointer$.base_194| |v_ULTIMATE.start_main_~p~0#1.base_178| (store (select |v_#memory_$Pointer$.base_194| |v_ULTIMATE.start_main_~p~0#1.base_178|) |v_ULTIMATE.start_main_~p~0#1.offset_148| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_178|) |v_ULTIMATE.start_main_~p~0#1.offset_148|))) |#memory_$Pointer$.base|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_178|) 1) (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_148|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_178|)) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_148|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_189| |v_ULTIMATE.start_main_~p~0#1.base_178| (store (select |v_#memory_$Pointer$.offset_189| |v_ULTIMATE.start_main_~p~0#1.base_178|) |v_ULTIMATE.start_main_~p~0#1.offset_148| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_178|) |v_ULTIMATE.start_main_~p~0#1.offset_148|)))))) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 2)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (<= 8 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)))' at error location [2023-12-02 20:15:13,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:15:13,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:15:13,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 31 [2023-12-02 20:15:13,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899742425] [2023-12-02 20:15:13,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:15:13,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 20:15:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:15:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 20:15:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1845, Unknown=12, NotChecked=182, Total=2352 [2023-12-02 20:15:13,596 INFO L87 Difference]: Start difference. First operand 168 states and 204 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 20:15:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:14,623 INFO L93 Difference]: Finished difference Result 226 states and 263 transitions. [2023-12-02 20:15:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 20:15:14,624 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) Word has length 25 [2023-12-02 20:15:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:14,625 INFO L225 Difference]: With dead ends: 226 [2023-12-02 20:15:14,625 INFO L226 Difference]: Without dead ends: 226 [2023-12-02 20:15:14,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=434, Invalid=2422, Unknown=14, NotChecked=210, Total=3080 [2023-12-02 20:15:14,627 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 343 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 36 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:14,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 498 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 871 Invalid, 4 Unknown, 319 Unchecked, 0.8s Time] [2023-12-02 20:15:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-02 20:15:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 166. [2023-12-02 20:15:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 153 states have (on average 1.3071895424836601) internal successors, (200), 165 states have internal predecessors, (200), 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 20:15:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2023-12-02 20:15:14,632 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 25 [2023-12-02 20:15:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:14,633 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2023-12-02 20:15:14,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 20:15:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2023-12-02 20:15:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 20:15:14,633 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:14,633 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:14,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 20:15:14,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 20:15:14,834 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:15:14,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:14,834 INFO L85 PathProgramCache]: Analyzing trace with hash -600654508, now seen corresponding path program 1 times [2023-12-02 20:15:14,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:15:14,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484212842] [2023-12-02 20:15:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:15:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:15,172 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 20:15:15,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:15:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484212842] [2023-12-02 20:15:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484212842] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:15:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418847977] [2023-12-02 20:15:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:15,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:15,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:15:15,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:15:15,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 20:15:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:15,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 20:15:15,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:15,389 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 20:15:15,434 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:15:15,434 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 20:15:15,485 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 20:15:15,496 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 20:15:15,532 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 20:15:15,570 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 20:15:15,593 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 20:15:15,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:15,619 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array Int Int))) (= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_846) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-12-02 20:15:15,629 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array Int Int))) (= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8)) v_ArrVal_846) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2023-12-02 20:15:15,639 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_843 (Array Int Int)) (v_ArrVal_846 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_843) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_846) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= v_ArrVal_843 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_843 .cse0))))))) is different from false [2023-12-02 20:15:15,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:15:15,705 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 70 treesize of output 74 [2023-12-02 20:15:15,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2023-12-02 20:15:15,751 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 143 treesize of output 137 [2023-12-02 20:15:15,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:15:15,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 74 [2023-12-02 20:15:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 20:15:15,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418847977] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:15,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819230806] [2023-12-02 20:15:15,978 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 20:15:15,978 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:15:15,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:15:15,979 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:15:15,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:15:20,501 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:15:23,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7854#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 4) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 1)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (<= 8 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (exists ((|v_#memory_int_218| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_208| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_156| Int) (|v_#memory_$Pointer$.base_214| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_188| Int)) (and (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_156|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_188|)) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_214| |v_ULTIMATE.start_main_~p~0#1.base_188| (store (select |v_#memory_$Pointer$.base_214| |v_ULTIMATE.start_main_~p~0#1.base_188|) |v_ULTIMATE.start_main_~p~0#1.offset_156| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_188|) |v_ULTIMATE.start_main_~p~0#1.offset_156|)))) (= (store |v_#memory_int_218| |v_ULTIMATE.start_main_~p~0#1.base_188| (store (select |v_#memory_int_218| |v_ULTIMATE.start_main_~p~0#1.base_188|) |v_ULTIMATE.start_main_~p~0#1.offset_156| 3)) |#memory_int|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_208| |v_ULTIMATE.start_main_~p~0#1.base_188| (store (select |v_#memory_$Pointer$.offset_208| |v_ULTIMATE.start_main_~p~0#1.base_188|) |v_ULTIMATE.start_main_~p~0#1.offset_156| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_188|) |v_ULTIMATE.start_main_~p~0#1.offset_156|)))) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_156|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_188|) 1))))' at error location [2023-12-02 20:15:23,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:15:23,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:15:23,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2023-12-02 20:15:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529535496] [2023-12-02 20:15:23,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:15:23,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 20:15:23,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:15:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 20:15:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1376, Unknown=6, NotChecked=240, Total=1892 [2023-12-02 20:15:23,357 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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 20:15:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:24,085 INFO L93 Difference]: Finished difference Result 238 states and 275 transitions. [2023-12-02 20:15:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 20:15:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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 25 [2023-12-02 20:15:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:24,087 INFO L225 Difference]: With dead ends: 238 [2023-12-02 20:15:24,087 INFO L226 Difference]: Without dead ends: 238 [2023-12-02 20:15:24,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=372, Invalid=1890, Unknown=6, NotChecked=282, Total=2550 [2023-12-02 20:15:24,089 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 223 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 30 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:24,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 554 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 849 Invalid, 3 Unknown, 492 Unchecked, 0.5s Time] [2023-12-02 20:15:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-02 20:15:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2023-12-02 20:15:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 153 states have (on average 1.3006535947712419) internal successors, (199), 165 states have internal predecessors, (199), 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 20:15:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 199 transitions. [2023-12-02 20:15:24,094 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 199 transitions. Word has length 25 [2023-12-02 20:15:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:24,094 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 199 transitions. [2023-12-02 20:15:24,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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 20:15:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 199 transitions. [2023-12-02 20:15:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 20:15:24,095 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:24,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:24,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 20:15:24,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 20:15:24,296 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:15:24,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1292689456, now seen corresponding path program 1 times [2023-12-02 20:15:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:15:24,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495214260] [2023-12-02 20:15:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:24,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:15:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:24,528 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 20:15:24,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:15:24,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495214260] [2023-12-02 20:15:24,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495214260] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:15:24,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160676228] [2023-12-02 20:15:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:24,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:15:24,529 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:15:24,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 20:15:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:24,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 20:15:24,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:24,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:15:24,736 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:15:24,737 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 20:15:24,784 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 20:15:24,791 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 20:15:24,819 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 20:15:24,846 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 20:15:24,861 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 15 treesize of output 7 [2023-12-02 20:15:24,874 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 20:15:24,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:24,904 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_922 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_922) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) is different from false [2023-12-02 20:15:24,957 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_920 (Array Int Int)) (v_ArrVal_922 (Array Int Int))) (or (not (= v_ArrVal_920 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_920 .cse0))))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_920) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_922) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3))) is different from false [2023-12-02 20:15:25,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:15:25,015 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 72 treesize of output 76 [2023-12-02 20:15:25,019 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 50 treesize of output 46 [2023-12-02 20:15:25,050 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 93 treesize of output 89 [2023-12-02 20:15:25,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:15:25,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 74 [2023-12-02 20:15:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 20:15:25,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160676228] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:25,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277846717] [2023-12-02 20:15:25,250 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 20:15:25,250 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:15:25,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:15:25,250 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:15:25,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:15:30,779 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:16:19,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8479#(and (= 3 (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0)) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~p~0#1.offset_165| Int) (|v_#valid_130| (Array Int Int)) (|v_#memory_int_237| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_199| Int) (|v_#memory_$Pointer$.base_231| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_224| (Array Int (Array Int Int)))) (and (= (select |v_#valid_130| |v_ULTIMATE.start_main_~p~0#1.base_199|) 1) (= (select |v_#valid_130| |ULTIMATE.start_main_~a~0#1.base|) 1) (= (store |v_#valid_130| |ULTIMATE.start_main_~a~0#1.base| 0) |#valid|) (= |#memory_int| (store |v_#memory_int_237| |v_ULTIMATE.start_main_~p~0#1.base_199| (store (select |v_#memory_int_237| |v_ULTIMATE.start_main_~p~0#1.base_199|) |v_ULTIMATE.start_main_~p~0#1.offset_165| 3))) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_165|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_231| |v_ULTIMATE.start_main_~p~0#1.base_199| (store (select |v_#memory_$Pointer$.base_231| |v_ULTIMATE.start_main_~p~0#1.base_199|) |v_ULTIMATE.start_main_~p~0#1.offset_165| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_199|) |v_ULTIMATE.start_main_~p~0#1.offset_165|)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_224| |v_ULTIMATE.start_main_~p~0#1.base_199| (store (select |v_#memory_$Pointer$.offset_224| |v_ULTIMATE.start_main_~p~0#1.base_199|) |v_ULTIMATE.start_main_~p~0#1.offset_165| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_199|) |v_ULTIMATE.start_main_~p~0#1.offset_165|)))) (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_165|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_199|)))) (= 0 |ULTIMATE.start_main_~p~0#1.base|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 12 (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (not (= |ULTIMATE.start_main_~a~0#1.base| 0)) (<= |ULTIMATE.start_main_~i~0#1| 20) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~a~0#1.base|) 8) 0) (<= (+ |ULTIMATE.start_main_~a~0#1.base| 1) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~a~0#1.base|) 8) 0) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 20:16:19,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:16:19,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:16:19,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-12-02 20:16:19,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378401937] [2023-12-02 20:16:19,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:16:19,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 20:16:19,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:16:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 20:16:19,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1920, Unknown=27, NotChecked=182, Total=2352 [2023-12-02 20:16:19,883 INFO L87 Difference]: Start difference. First operand 166 states and 199 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 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 20:16:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:16:22,817 INFO L93 Difference]: Finished difference Result 245 states and 284 transitions. [2023-12-02 20:16:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 20:16:22,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 20:16:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:16:22,819 INFO L225 Difference]: With dead ends: 245 [2023-12-02 20:16:22,819 INFO L226 Difference]: Without dead ends: 245 [2023-12-02 20:16:22,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=405, Invalid=3235, Unknown=28, NotChecked=238, Total=3906 [2023-12-02 20:16:22,821 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 537 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 49 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:16:22,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 541 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 778 Invalid, 3 Unknown, 389 Unchecked, 1.6s Time] [2023-12-02 20:16:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-12-02 20:16:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 191. [2023-12-02 20:16:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 178 states have (on average 1.3258426966292134) internal successors, (236), 190 states have internal predecessors, (236), 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 20:16:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 236 transitions. [2023-12-02 20:16:22,825 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 236 transitions. Word has length 28 [2023-12-02 20:16:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:16:22,826 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 236 transitions. [2023-12-02 20:16:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 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 20:16:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 236 transitions. [2023-12-02 20:16:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 20:16:22,826 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:16:22,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:16:22,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 20:16:23,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 20:16:23,027 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:16:23,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:16:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1449626273, now seen corresponding path program 2 times [2023-12-02 20:16:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:16:23,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710601338] [2023-12-02 20:16:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:23,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:16:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:23,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:16:23,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710601338] [2023-12-02 20:16:23,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710601338] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:16:23,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939273210] [2023-12-02 20:16:23,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:16:23,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:16:23,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:16:23,678 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:16:23,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 20:16:23,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:16:23,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:16:23,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 20:16:23,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:24,116 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:16:24,116 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 20:16:24,127 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 20:16:24,273 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 20:16:24,279 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 20:16:24,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-12-02 20:16:24,553 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 20:16:24,553 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 65 treesize of output 60 [2023-12-02 20:16:24,559 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 23 treesize of output 13 [2023-12-02 20:16:24,945 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:16:24,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:24,950 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 44 treesize of output 23 [2023-12-02 20:16:25,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:25,075 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 15 treesize of output 15 [2023-12-02 20:16:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:25,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:25,897 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 34 treesize of output 21 [2023-12-02 20:16:26,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:26,631 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 20:16:26,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:26,651 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 20:16:26,660 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 29 treesize of output 21 [2023-12-02 20:16:26,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:26,828 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 20:16:26,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:26,859 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 20:16:26,868 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 20:16:26,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:26,995 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 20:16:27,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:27,027 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 20:16:27,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-02 20:16:28,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:28,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 225 treesize of output 434 [2023-12-02 20:16:40,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:40,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 129 [2023-12-02 20:16:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:41,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939273210] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:41,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279332323] [2023-12-02 20:16:41,375 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:16:41,375 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:16:41,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:16:41,376 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:16:41,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:16:41,939 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:16:47,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9181#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 20:16:47,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:16:47,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:16:47,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 35 [2023-12-02 20:16:47,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618187977] [2023-12-02 20:16:47,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:16:47,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 20:16:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:16:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 20:16:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2354, Unknown=2, NotChecked=0, Total=2550 [2023-12-02 20:16:47,798 INFO L87 Difference]: Start difference. First operand 191 states and 236 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 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 20:16:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:16:53,044 INFO L93 Difference]: Finished difference Result 228 states and 269 transitions. [2023-12-02 20:16:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 20:16:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-02 20:16:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:16:53,046 INFO L225 Difference]: With dead ends: 228 [2023-12-02 20:16:53,046 INFO L226 Difference]: Without dead ends: 228 [2023-12-02 20:16:53,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=510, Invalid=4318, Unknown=2, NotChecked=0, Total=4830 [2023-12-02 20:16:53,048 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 609 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 20:16:53,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 699 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 20:16:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-12-02 20:16:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 191. [2023-12-02 20:16:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 178 states have (on average 1.3202247191011236) internal successors, (235), 190 states have internal predecessors, (235), 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 20:16:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2023-12-02 20:16:53,052 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 31 [2023-12-02 20:16:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:16:53,052 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2023-12-02 20:16:53,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 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 20:16:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2023-12-02 20:16:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 20:16:53,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:16:53,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:16:53,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 20:16:53,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 20:16:53,253 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:16:53,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:16:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1459169003, now seen corresponding path program 1 times [2023-12-02 20:16:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:16:53,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487181662] [2023-12-02 20:16:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:16:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:53,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:16:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487181662] [2023-12-02 20:16:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487181662] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:16:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433124181] [2023-12-02 20:16:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:53,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:16:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:16:53,688 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:16:53,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 20:16:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:53,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 20:16:53,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:54,132 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:16:54,132 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 20:16:54,227 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 19 treesize of output 1 [2023-12-02 20:16:54,238 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 20:16:54,499 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 20:16:54,499 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 80 treesize of output 73 [2023-12-02 20:16:54,506 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 29 treesize of output 19 [2023-12-02 20:16:54,512 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 40 treesize of output 23 [2023-12-02 20:16:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:16:54,771 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 39 treesize of output 21 [2023-12-02 20:16:54,778 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:16:54,779 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 20:16:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:54,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:55,071 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 52 treesize of output 30 [2023-12-02 20:16:55,247 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 27 treesize of output 21 [2023-12-02 20:16:55,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:16:55,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:16:55,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:16:55,612 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 28 treesize of output 46 [2023-12-02 20:16:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:55,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433124181] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:55,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327082969] [2023-12-02 20:16:55,761 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 20:16:55,761 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:16:55,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:16:55,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:16:55,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:17:00,433 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:17:03,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9860#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 20:17:03,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:17:03,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:17:03,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-12-02 20:17:03,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615521407] [2023-12-02 20:17:03,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:17:03,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 20:17:03,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:17:03,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 20:17:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1619, Unknown=2, NotChecked=0, Total=1806 [2023-12-02 20:17:03,838 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 20:17:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:17:06,382 INFO L93 Difference]: Finished difference Result 206 states and 235 transitions. [2023-12-02 20:17:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 20:17:06,383 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-02 20:17:06,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:17:06,384 INFO L225 Difference]: With dead ends: 206 [2023-12-02 20:17:06,385 INFO L226 Difference]: Without dead ends: 206 [2023-12-02 20:17:06,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=390, Invalid=2800, Unknown=2, NotChecked=0, Total=3192 [2023-12-02 20:17:06,387 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 565 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:17:06,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 464 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 20:17:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-12-02 20:17:06,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 166. [2023-12-02 20:17:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 165 states have internal predecessors, (195), 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 20:17:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 195 transitions. [2023-12-02 20:17:06,392 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 195 transitions. Word has length 31 [2023-12-02 20:17:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:17:06,393 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 195 transitions. [2023-12-02 20:17:06,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 20:17:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 195 transitions. [2023-12-02 20:17:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 20:17:06,394 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:17:06,394 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:17:06,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 20:17:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 20:17:06,595 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:17:06,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:17:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1352733809, now seen corresponding path program 3 times [2023-12-02 20:17:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:17:06,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968514242] [2023-12-02 20:17:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:17:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:17:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:17:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:17:07,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:17:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968514242] [2023-12-02 20:17:07,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968514242] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:17:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714741405] [2023-12-02 20:17:07,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:17:07,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:17:07,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:17:07,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:17:07,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 20:17:07,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:17:07,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:17:07,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 20:17:07,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:17:07,557 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:17:07,557 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 20:17:07,660 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 20:17:07,861 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 20:17:07,861 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 24 treesize of output 17 [2023-12-02 20:17:07,931 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 20:17:07,932 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 24 treesize of output 17 [2023-12-02 20:17:07,972 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:17:07,972 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 20:17:08,108 INFO L349 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2023-12-02 20:17:08,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-12-02 20:17:08,402 INFO L349 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2023-12-02 20:17:08,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 59 [2023-12-02 20:17:08,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 20:17:08,582 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 20:17:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:17:08,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:17:08,901 INFO L349 Elim1Store]: treesize reduction 5, result has 81.5 percent of original size [2023-12-02 20:17:08,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-12-02 20:17:09,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:09,179 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 20 treesize of output 24 [2023-12-02 20:17:09,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:09,478 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 29 treesize of output 30 [2023-12-02 20:17:09,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:09,501 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 164 treesize of output 157 [2023-12-02 20:17:09,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2023-12-02 20:17:09,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:09,531 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 64 treesize of output 56 [2023-12-02 20:17:09,557 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 20:17:09,557 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 20:17:09,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:09,882 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 28 treesize of output 46 [2023-12-02 20:17:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:17:09,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714741405] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:17:09,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780766111] [2023-12-02 20:17:09,930 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:17:09,930 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:17:09,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:17:09,930 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:17:09,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:17:14,561 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:17:17,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10504#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 20:17:17,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:17:17,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:17:17,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 28 [2023-12-02 20:17:17,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760480278] [2023-12-02 20:17:17,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:17:17,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 20:17:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:17:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 20:17:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1668, Unknown=26, NotChecked=0, Total=1892 [2023-12-02 20:17:17,996 INFO L87 Difference]: Start difference. First operand 166 states and 195 transitions. Second operand has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 29 states have internal predecessors, (87), 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 20:17:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:17:20,965 INFO L93 Difference]: Finished difference Result 241 states and 269 transitions. [2023-12-02 20:17:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 20:17:20,966 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 29 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 20:17:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:17:20,967 INFO L225 Difference]: With dead ends: 241 [2023-12-02 20:17:20,967 INFO L226 Difference]: Without dead ends: 241 [2023-12-02 20:17:20,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=380, Invalid=2784, Unknown=28, NotChecked=0, Total=3192 [2023-12-02 20:17:20,969 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 783 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:17:20,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 614 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 20:17:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-12-02 20:17:20,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 166. [2023-12-02 20:17:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 153 states have (on average 1.2679738562091503) internal successors, (194), 165 states have internal predecessors, (194), 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 20:17:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 194 transitions. [2023-12-02 20:17:20,975 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 194 transitions. Word has length 34 [2023-12-02 20:17:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:17:20,975 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 194 transitions. [2023-12-02 20:17:20,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 29 states have internal predecessors, (87), 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 20:17:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 194 transitions. [2023-12-02 20:17:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 20:17:20,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:17:20,976 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:17:20,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 20:17:21,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 20:17:21,177 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:17:21,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:17:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1352733808, now seen corresponding path program 2 times [2023-12-02 20:17:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:17:21,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570283662] [2023-12-02 20:17:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:17:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:17:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:17:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:17:22,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:17:22,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570283662] [2023-12-02 20:17:22,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570283662] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:17:22,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006288742] [2023-12-02 20:17:22,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:17:22,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:17:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:17:22,116 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:17:22,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 20:17:22,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:17:22,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:17:22,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 20:17:22,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:17:22,592 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 20:17:22,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 20:17:22,622 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 20:17:22,760 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 20:17:22,766 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 20:17:23,059 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:17:23,059 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 16 treesize of output 15 [2023-12-02 20:17:23,102 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 20:17:23,102 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 20:17:23,323 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:17:23,324 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 16 treesize of output 15 [2023-12-02 20:17:23,363 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 20:17:23,364 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 20:17:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:17:23,442 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 20:17:23,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 20:17:23,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 20:17:23,644 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:17:23,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 20:17:23,699 INFO L349 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2023-12-02 20:17:23,699 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 1 case distinctions, treesize of input 44 treesize of output 20 [2023-12-02 20:17:24,078 INFO L349 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2023-12-02 20:17:24,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 81 [2023-12-02 20:17:24,092 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 36 treesize of output 11 [2023-12-02 20:17:24,393 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:17:24,393 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 24 [2023-12-02 20:17:24,403 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 20:17:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:17:24,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:17:24,634 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (forall ((v_ArrVal_1310 (Array Int Int)) (v_ArrVal_1309 (Array Int Int))) (<= (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1309) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1310) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)))) (forall ((v_ArrVal_1309 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1309) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))))) is different from false [2023-12-02 20:17:24,676 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (forall ((v_ArrVal_1310 (Array Int Int)) (v_ArrVal_1309 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1310) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)))) (forall ((v_ArrVal_1309 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))))) is different from false [2023-12-02 20:17:25,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:25,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2023-12-02 20:17:25,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:25,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 20:17:25,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:25,705 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 156 treesize of output 149 [2023-12-02 20:17:25,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-02 20:17:25,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-12-02 20:17:25,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:25,822 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 66 treesize of output 67 [2023-12-02 20:17:25,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:25,835 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 56 treesize of output 57 [2023-12-02 20:17:25,842 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:17:25,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:25,866 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 90 treesize of output 89 [2023-12-02 20:17:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:17:25,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:25,903 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 124 treesize of output 117 [2023-12-02 20:17:25,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:25,925 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 56 treesize of output 48 [2023-12-02 20:17:25,934 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 18 treesize of output 14 [2023-12-02 20:17:28,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:17:28,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 132 treesize of output 726 [2023-12-02 20:17:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-12-02 20:17:59,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006288742] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:17:59,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129958963] [2023-12-02 20:17:59,243 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:17:59,243 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:17:59,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:17:59,243 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:17:59,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:18:03,899 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:18:07,510 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11184#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 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 20:18:07,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:18:07,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:18:07,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 33 [2023-12-02 20:18:07,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091569658] [2023-12-02 20:18:07,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:18:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 20:18:07,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:18:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 20:18:07,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=8, NotChecked=186, Total=2450 [2023-12-02 20:18:07,513 INFO L87 Difference]: Start difference. First operand 166 states and 194 transitions. Second operand has 34 states, 33 states have (on average 2.909090909090909) internal successors, (96), 34 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:18:10,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:18:12,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:18:19,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:18:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:18:23,714 INFO L93 Difference]: Finished difference Result 314 states and 353 transitions. [2023-12-02 20:18:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-02 20:18:23,715 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.909090909090909) internal successors, (96), 34 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 20:18:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:18:23,717 INFO L225 Difference]: With dead ends: 314 [2023-12-02 20:18:23,717 INFO L226 Difference]: Without dead ends: 314 [2023-12-02 20:18:23,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=771, Invalid=6341, Unknown=36, NotChecked=334, Total=7482 [2023-12-02 20:18:23,719 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 994 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 132 mSolverCounterUnsat, 45 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 45 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:18:23,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1004 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1724 Invalid, 45 Unknown, 618 Unchecked, 11.5s Time] [2023-12-02 20:18:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-02 20:18:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 195. [2023-12-02 20:18:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 182 states have (on average 1.2692307692307692) internal successors, (231), 194 states have internal predecessors, (231), 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 20:18:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 231 transitions. [2023-12-02 20:18:23,725 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 231 transitions. Word has length 34 [2023-12-02 20:18:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:18:23,725 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 231 transitions. [2023-12-02 20:18:23,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.909090909090909) internal successors, (96), 34 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:18:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 231 transitions. [2023-12-02 20:18:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 20:18:23,726 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:18:23,726 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:18:23,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 20:18:23,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:18:23,927 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:18:23,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:18:23,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1014842826, now seen corresponding path program 2 times [2023-12-02 20:18:23,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:18:23,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330586718] [2023-12-02 20:18:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:18:23,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:18:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:18:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:18:24,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:18:24,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330586718] [2023-12-02 20:18:24,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330586718] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:18:24,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353936444] [2023-12-02 20:18:24,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:18:24,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:18:24,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:18:24,788 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:18:24,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 20:18:24,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:18:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:18:24,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 20:18:24,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:18:25,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 20:18:25,321 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 20:18:25,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 20:18:25,463 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 20:18:25,470 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 20:18:25,596 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 20:18:25,730 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 20:18:25,868 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 20:18:25,932 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 20:18:25,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 20:18:26,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 20:18:26,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 20:18:26,168 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 30 treesize of output 12 [2023-12-02 20:18:26,269 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 20:18:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:18:26,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:18:26,396 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1430 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1430) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2)) is different from false [2023-12-02 20:18:27,225 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1422 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_35| Int) (|v_ULTIMATE.start_main_~t~0#1.base_34| Int) (v_ArrVal_1430 (Array Int Int)) (v_ArrVal_1429 (Array Int Int))) (or (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_35| 1) |v_ULTIMATE.start_main_~t~0#1.base_34|) 0)) (not (= v_ArrVal_1422 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_1422 .cse0))))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_35|) 0)) (= 2 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1422) |v_ULTIMATE.start_main_~t~0#1.base_35| v_ArrVal_1429) |v_ULTIMATE.start_main_~t~0#1.base_34| v_ArrVal_1430) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2023-12-02 20:18:27,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:18:27,253 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 984 treesize of output 974 [2023-12-02 20:18:27,274 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 63 treesize of output 59 [2023-12-02 20:18:27,284 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 54 treesize of output 46 [2023-12-02 20:18:27,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 20:18:27,346 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 48 treesize of output 46 [2023-12-02 20:18:28,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:18:28,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 284 [2023-12-02 20:18:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-12-02 20:18:29,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353936444] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:18:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1797710051] [2023-12-02 20:18:29,605 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 20:18:29,606 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:18:29,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:18:29,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:18:29,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:18:30,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:18:37,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12026#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 4) 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 2)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (<= 8 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (exists ((|v_#memory_$Pointer$.offset_338| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_236| Int) (|v_ULTIMATE.start_main_~p~0#1.base_279| Int) (|v_#memory_$Pointer$.base_353| (Array Int (Array Int Int))) (|v_#memory_int_351| (Array Int (Array Int Int)))) (and (or (and (= |ULTIMATE.start_main_~i~0#1| 0) (= |v_ULTIMATE.start_main_~p~0#1.offset_236| 0)) (= |ULTIMATE.start_main_~t~0#1.offset| 0)) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_236|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_353| |v_ULTIMATE.start_main_~p~0#1.base_279| (store (select |v_#memory_$Pointer$.base_353| |v_ULTIMATE.start_main_~p~0#1.base_279|) |v_ULTIMATE.start_main_~p~0#1.offset_236| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_279|) |v_ULTIMATE.start_main_~p~0#1.offset_236|)))) (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_236|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_279|)) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_279|) 1) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_338| |v_ULTIMATE.start_main_~p~0#1.base_279| (store (select |v_#memory_$Pointer$.offset_338| |v_ULTIMATE.start_main_~p~0#1.base_279|) |v_ULTIMATE.start_main_~p~0#1.offset_236| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_279|) |v_ULTIMATE.start_main_~p~0#1.offset_236|)))) (= |#memory_int| (store |v_#memory_int_351| |v_ULTIMATE.start_main_~p~0#1.base_279| (store (select |v_#memory_int_351| |v_ULTIMATE.start_main_~p~0#1.base_279|) |v_ULTIMATE.start_main_~p~0#1.offset_236| 3))))))' at error location [2023-12-02 20:18:37,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:18:37,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:18:37,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 38 [2023-12-02 20:18:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096930849] [2023-12-02 20:18:37,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:18:37,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 20:18:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:18:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 20:18:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2423, Unknown=10, NotChecked=206, Total=2970 [2023-12-02 20:18:37,967 INFO L87 Difference]: Start difference. First operand 195 states and 231 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 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 20:18:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:18:41,136 INFO L93 Difference]: Finished difference Result 349 states and 407 transitions. [2023-12-02 20:18:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 20:18:41,137 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 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 35 [2023-12-02 20:18:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:18:41,138 INFO L225 Difference]: With dead ends: 349 [2023-12-02 20:18:41,139 INFO L226 Difference]: Without dead ends: 349 [2023-12-02 20:18:41,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=564, Invalid=3724, Unknown=10, NotChecked=258, Total=4556 [2023-12-02 20:18:41,140 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 453 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:18:41,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 515 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 998 Invalid, 0 Unknown, 346 Unchecked, 2.0s Time] [2023-12-02 20:18:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-12-02 20:18:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 258. [2023-12-02 20:18:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 245 states have (on average 1.2571428571428571) internal successors, (308), 257 states have internal predecessors, (308), 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 20:18:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 308 transitions. [2023-12-02 20:18:41,147 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 308 transitions. Word has length 35 [2023-12-02 20:18:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:18:41,148 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 308 transitions. [2023-12-02 20:18:41,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 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 20:18:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 308 transitions. [2023-12-02 20:18:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 20:18:41,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:18:41,149 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:18:41,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 20:18:41,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 20:18:41,349 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:18:41,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:18:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash 719018196, now seen corresponding path program 2 times [2023-12-02 20:18:41,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:18:41,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947426689] [2023-12-02 20:18:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:18:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:18:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:18:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:18:42,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:18:42,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947426689] [2023-12-02 20:18:42,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947426689] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:18:42,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954436573] [2023-12-02 20:18:42,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:18:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:18:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:18:42,308 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:18:42,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 20:18:42,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:18:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:18:42,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-02 20:18:42,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:18:42,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:18:42,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 20:18:42,940 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 20:18:42,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 20:18:43,079 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 20:18:43,088 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 20:18:43,099 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 20:18:43,216 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 20:18:43,221 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 20:18:43,350 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 20:18:43,505 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 20:18:43,573 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 20:18:43,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 20:18:43,735 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 20:18:43,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 20:18:43,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 20:18:43,864 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 24 treesize of output 12 [2023-12-02 20:18:43,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-12-02 20:18:43,971 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 20:18:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:18:44,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:18:44,070 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1553 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1553) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) is different from false [2023-12-02 20:18:44,162 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1553 (Array Int Int)) (v_ArrVal_1552 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1552) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_1553) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)) is different from false [2023-12-02 20:18:45,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:18:45,481 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 2223 treesize of output 2197 [2023-12-02 20:18:45,502 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 76 treesize of output 68 [2023-12-02 20:18:45,558 INFO L349 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-12-02 20:18:45,558 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 22 treesize of output 22 [2023-12-02 20:18:45,573 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 62 treesize of output 46 [2023-12-02 20:18:45,631 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 259 treesize of output 247 [2023-12-02 20:18:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 20:18:45,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954436573] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:18:45,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950424225] [2023-12-02 20:18:45,810 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 20:18:45,810 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:18:45,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:18:45,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:18:45,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:18:46,304 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:18:55,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12925#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_291| Int) (|v_#memory_int_380| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_362| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_247| Int) (|v_#memory_$Pointer$.base_377| (Array Int (Array Int Int)))) (and (or (and (= |ULTIMATE.start_main_~i~0#1| 0) (= |v_ULTIMATE.start_main_~p~0#1.offset_247| 0)) (= |ULTIMATE.start_main_~t~0#1.offset| 0)) (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_247|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_291|)) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_247|) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_291|) 1) (= (store |v_#memory_int_380| |v_ULTIMATE.start_main_~p~0#1.base_291| (store (select |v_#memory_int_380| |v_ULTIMATE.start_main_~p~0#1.base_291|) |v_ULTIMATE.start_main_~p~0#1.offset_247| 3)) |#memory_int|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_362| |v_ULTIMATE.start_main_~p~0#1.base_291| (store (select |v_#memory_$Pointer$.offset_362| |v_ULTIMATE.start_main_~p~0#1.base_291|) |v_ULTIMATE.start_main_~p~0#1.offset_247| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_291|) |v_ULTIMATE.start_main_~p~0#1.offset_247|)))) (= (store |v_#memory_$Pointer$.base_377| |v_ULTIMATE.start_main_~p~0#1.base_291| (store (select |v_#memory_$Pointer$.base_377| |v_ULTIMATE.start_main_~p~0#1.base_291|) |v_ULTIMATE.start_main_~p~0#1.offset_247| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_291|) |v_ULTIMATE.start_main_~p~0#1.offset_247|))) |#memory_$Pointer$.base|))) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 4) 0)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 1)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (<= 8 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)))' at error location [2023-12-02 20:18:55,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:18:55,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:18:55,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 43 [2023-12-02 20:18:55,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521415388] [2023-12-02 20:18:55,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:18:55,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 20:18:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:18:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 20:18:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2903, Unknown=19, NotChecked=226, Total=3540 [2023-12-02 20:18:55,523 INFO L87 Difference]: Start difference. First operand 258 states and 308 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 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 20:18:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:18:59,017 INFO L93 Difference]: Finished difference Result 327 states and 379 transitions. [2023-12-02 20:18:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 20:18:59,018 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 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 35 [2023-12-02 20:18:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:18:59,020 INFO L225 Difference]: With dead ends: 327 [2023-12-02 20:18:59,020 INFO L226 Difference]: Without dead ends: 327 [2023-12-02 20:18:59,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=579, Invalid=3962, Unknown=23, NotChecked=266, Total=4830 [2023-12-02 20:18:59,021 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 486 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:18:59,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 625 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1271 Invalid, 0 Unknown, 322 Unchecked, 2.5s Time] [2023-12-02 20:18:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-12-02 20:18:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 258. [2023-12-02 20:18:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 245 states have (on average 1.2448979591836735) internal successors, (305), 257 states have internal predecessors, (305), 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 20:18:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 305 transitions. [2023-12-02 20:18:59,028 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 305 transitions. Word has length 35 [2023-12-02 20:18:59,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:18:59,028 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 305 transitions. [2023-12-02 20:18:59,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 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 20:18:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 305 transitions. [2023-12-02 20:18:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 20:18:59,029 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:18:59,029 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:18:59,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 20:18:59,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:18:59,230 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:18:59,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:18:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1775422762, now seen corresponding path program 1 times [2023-12-02 20:18:59,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:18:59,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946808490] [2023-12-02 20:18:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:18:59,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:18:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:19:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:19:00,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:19:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946808490] [2023-12-02 20:19:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946808490] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:19:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739129878] [2023-12-02 20:19:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:19:00,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:19:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:19:00,320 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:19:00,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 20:19:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:19:00,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 20:19:00,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:19:00,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:19:00,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 20:19:00,914 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:19:00,915 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 20:19:01,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 20:19:01,044 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 20:19:01,154 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 20:19:01,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-12-02 20:19:01,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-12-02 20:19:01,368 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:19:01,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 20:19:01,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 20:19:01,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-12-02 20:19:01,544 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 20 treesize of output 8 [2023-12-02 20:19:01,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-12-02 20:19:01,701 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 20:19:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:19:01,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:19:01,731 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1673 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1673) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0))) is different from false [2023-12-02 20:19:02,309 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 20:19:02,310 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 20:19:02,330 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_38| Int) (v_ArrVal_1673 (Array Int Int)) (v_ArrVal_1671 (Array Int Int))) (or (not (= v_ArrVal_1666 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_1666 .cse0))))) (= |v_ULTIMATE.start_main_~t~0#1.base_38| |c_ULTIMATE.start_main_~p~0#1.base|) (not (= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_1671) |v_ULTIMATE.start_main_~t~0#1.base_38| v_ArrVal_1673) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 0)))) is different from false [2023-12-02 20:19:03,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:19:03,017 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 604 treesize of output 602 [2023-12-02 20:19:03,042 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 147 treesize of output 139 [2023-12-02 20:19:03,052 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 139 treesize of output 123 [2023-12-02 20:19:03,079 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 20:19:03,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-12-02 20:19:03,177 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 278 treesize of output 270 [2023-12-02 20:19:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 20:19:03,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739129878] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:19:03,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763353232] [2023-12-02 20:19:03,314 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 20:19:03,314 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:19:03,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:19:03,314 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:19:03,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:19:26,696 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:19:36,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13793#(and (<= 0 |ULTIMATE.start_main_~p~0#1.offset|) (<= (+ |ULTIMATE.start_main_~p~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (exists ((|v_#memory_$Pointer$.base_428| (Array Int (Array Int Int))) (|v_#memory_int_436| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_265| Int) (|v_ULTIMATE.start_main_~p~0#1.base_312| Int) (|v_#memory_$Pointer$.offset_411| (Array Int (Array Int Int)))) (and (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_265|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_312|)) (= |#memory_int| (store |v_#memory_int_436| |v_ULTIMATE.start_main_~p~0#1.base_312| (store (select |v_#memory_int_436| |v_ULTIMATE.start_main_~p~0#1.base_312|) |v_ULTIMATE.start_main_~p~0#1.offset_265| 3))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_428| |v_ULTIMATE.start_main_~p~0#1.base_312| (store (select |v_#memory_$Pointer$.base_428| |v_ULTIMATE.start_main_~p~0#1.base_312|) |v_ULTIMATE.start_main_~p~0#1.offset_265| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_312|) |v_ULTIMATE.start_main_~p~0#1.offset_265|)))) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_265|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_411| |v_ULTIMATE.start_main_~p~0#1.base_312| (store (select |v_#memory_$Pointer$.offset_411| |v_ULTIMATE.start_main_~p~0#1.base_312|) |v_ULTIMATE.start_main_~p~0#1.offset_265| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_312|) |v_ULTIMATE.start_main_~p~0#1.offset_265|)))) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_312|) 1))) (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) (+ |ULTIMATE.start_main_~p~0#1.offset| 4)) 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 2)) (= |ULTIMATE.start_main_~a~0#1.offset| |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|) 3)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1))' at error location [2023-12-02 20:19:36,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:19:36,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:19:36,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 41 [2023-12-02 20:19:36,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531180186] [2023-12-02 20:19:36,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:19:36,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 20:19:36,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:19:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 20:19:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2767, Unknown=28, NotChecked=218, Total=3306 [2023-12-02 20:19:36,102 INFO L87 Difference]: Start difference. First operand 258 states and 305 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 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 20:19:39,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:19:39,678 INFO L93 Difference]: Finished difference Result 318 states and 365 transitions. [2023-12-02 20:19:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 20:19:39,679 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 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 35 [2023-12-02 20:19:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:19:39,681 INFO L225 Difference]: With dead ends: 318 [2023-12-02 20:19:39,681 INFO L226 Difference]: Without dead ends: 318 [2023-12-02 20:19:39,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=398, Invalid=3242, Unknown=28, NotChecked=238, Total=3906 [2023-12-02 20:19:39,682 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 470 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:19:39,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 724 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1542 Invalid, 0 Unknown, 310 Unchecked, 3.1s Time] [2023-12-02 20:19:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-12-02 20:19:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 257. [2023-12-02 20:19:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 244 states have (on average 1.2336065573770492) internal successors, (301), 256 states have internal predecessors, (301), 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 20:19:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 301 transitions. [2023-12-02 20:19:39,689 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 301 transitions. Word has length 35 [2023-12-02 20:19:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:19:39,689 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 301 transitions. [2023-12-02 20:19:39,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 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 20:19:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 301 transitions. [2023-12-02 20:19:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 20:19:39,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:19:39,690 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:19:39,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 20:19:39,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:19:39,891 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:19:39,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:19:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1479598132, now seen corresponding path program 1 times [2023-12-02 20:19:39,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:19:39,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362836032] [2023-12-02 20:19:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:19:39,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:19:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:19:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:19:40,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:19:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362836032] [2023-12-02 20:19:40,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362836032] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:19:40,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594996850] [2023-12-02 20:19:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:19:40,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:19:40,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:19:40,755 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:19:40,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 20:19:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:19:40,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 20:19:40,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:19:41,125 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 20:19:41,257 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 20:19:41,257 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 20:19:41,398 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 20:19:41,409 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 20:19:41,519 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 20:19:41,657 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 20:19:41,732 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 20:19:41,787 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 20:19:41,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 20:19:41,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 20:19:41,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 20:19:42,006 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 30 treesize of output 12 [2023-12-02 20:19:42,099 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 20:19:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:19:42,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:19:42,218 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1793 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1793) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2023-12-02 20:19:42,239 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1793 (Array Int Int))) (= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8)) v_ArrVal_1793) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2023-12-02 20:19:42,724 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1786 (Array Int Int)) (v_ArrVal_1793 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_48| Int) (v_ArrVal_1791 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_48|) 0)) (= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1786) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_1791) |v_ULTIMATE.start_main_~t~0#1.base_48| v_ArrVal_1793) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_1786 .cse0))) v_ArrVal_1786)))) is different from false [2023-12-02 20:19:42,772 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1786 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_49| Int) (v_ArrVal_1793 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_48| Int) (v_ArrVal_1791 (Array Int Int))) (or (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_49| 1) |v_ULTIMATE.start_main_~t~0#1.base_48|) 0)) (= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1786) |v_ULTIMATE.start_main_~t~0#1.base_49| v_ArrVal_1791) |v_ULTIMATE.start_main_~t~0#1.base_48| v_ArrVal_1793) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_49|) 0)) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_1786 .cse0))) v_ArrVal_1786)))) is different from false [2023-12-02 20:19:42,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:19:42,806 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 984 treesize of output 974 [2023-12-02 20:19:42,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2023-12-02 20:19:42,843 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 50 treesize of output 46 [2023-12-02 20:19:42,912 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 63 treesize of output 59 [2023-12-02 20:19:42,982 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-02 20:19:43,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:19:43,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 284 [2023-12-02 20:19:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-12-02 20:19:46,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594996850] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:19:46,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225738708] [2023-12-02 20:19:46,244 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 20:19:46,244 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:19:46,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:19:46,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:19:46,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:20:10,306 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:20:19,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14637#(and (<= 0 |ULTIMATE.start_main_~p~0#1.offset|) (<= (+ |ULTIMATE.start_main_~p~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) (+ |ULTIMATE.start_main_~p~0#1.offset| 4)) 0)) (= |ULTIMATE.start_main_~a~0#1.offset| |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|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1) (exists ((|v_#memory_$Pointer$.base_481| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_283| Int) (|v_#memory_$Pointer$.offset_462| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_333| Int) (|v_#memory_int_493| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_493| |v_ULTIMATE.start_main_~p~0#1.base_333| (store (select |v_#memory_int_493| |v_ULTIMATE.start_main_~p~0#1.base_333|) |v_ULTIMATE.start_main_~p~0#1.offset_283| 3))) (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_283|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_333|)) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_481| |v_ULTIMATE.start_main_~p~0#1.base_333| (store (select |v_#memory_$Pointer$.base_481| |v_ULTIMATE.start_main_~p~0#1.base_333|) |v_ULTIMATE.start_main_~p~0#1.offset_283| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_333|) |v_ULTIMATE.start_main_~p~0#1.offset_283|)))) (= (select |#valid| |v_ULTIMATE.start_main_~p~0#1.base_333|) 1) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_283|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_462| |v_ULTIMATE.start_main_~p~0#1.base_333| (store (select |v_#memory_$Pointer$.offset_462| |v_ULTIMATE.start_main_~p~0#1.base_333|) |v_ULTIMATE.start_main_~p~0#1.offset_283| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_333|) |v_ULTIMATE.start_main_~p~0#1.offset_283|)))))))' at error location [2023-12-02 20:20:19,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:20:19,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:20:19,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 36 [2023-12-02 20:20:19,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587430728] [2023-12-02 20:20:19,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:20:19,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 20:20:19,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:20:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 20:20:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2104, Unknown=11, NotChecked=388, Total=2756 [2023-12-02 20:20:19,286 INFO L87 Difference]: Start difference. First operand 257 states and 301 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 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 20:20:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:20:22,958 INFO L93 Difference]: Finished difference Result 334 states and 378 transitions. [2023-12-02 20:20:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 20:20:22,958 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 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 35 [2023-12-02 20:20:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:20:22,961 INFO L225 Difference]: With dead ends: 334 [2023-12-02 20:20:22,961 INFO L226 Difference]: Without dead ends: 334 [2023-12-02 20:20:22,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=458, Invalid=3207, Unknown=11, NotChecked=484, Total=4160 [2023-12-02 20:20:22,962 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 321 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:20:22,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 706 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1270 Invalid, 0 Unknown, 671 Unchecked, 2.4s Time] [2023-12-02 20:20:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-12-02 20:20:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 259. [2023-12-02 20:20:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 246 states have (on average 1.2235772357723578) internal successors, (301), 258 states have internal predecessors, (301), 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 20:20:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 301 transitions. [2023-12-02 20:20:22,968 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 301 transitions. Word has length 35 [2023-12-02 20:20:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:20:22,968 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 301 transitions. [2023-12-02 20:20:22,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 36 states have internal predecessors, (93), 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 20:20:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 301 transitions. [2023-12-02 20:20:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 20:20:22,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:20:22,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:20:22,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 20:20:23,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 20:20:23,170 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:20:23,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:20:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1739262732, now seen corresponding path program 1 times [2023-12-02 20:20:23,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:20:23,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009741057] [2023-12-02 20:20:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:20:23,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:20:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:20:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 20:20:23,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:20:23,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009741057] [2023-12-02 20:20:23,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009741057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:20:23,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:20:23,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 20:20:23,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872489771] [2023-12-02 20:20:23,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:20:23,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 20:20:23,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:20:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 20:20:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 20:20:23,279 INFO L87 Difference]: Start difference. First operand 259 states and 301 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 20:20:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:20:23,555 INFO L93 Difference]: Finished difference Result 258 states and 297 transitions. [2023-12-02 20:20:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 20:20:23,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 37 [2023-12-02 20:20:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:20:23,557 INFO L225 Difference]: With dead ends: 258 [2023-12-02 20:20:23,557 INFO L226 Difference]: Without dead ends: 258 [2023-12-02 20:20:23,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:20:23,557 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:20:23,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 146 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:20:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-02 20:20:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2023-12-02 20:20:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 244 states have (on average 1.2131147540983607) internal successors, (296), 256 states have internal predecessors, (296), 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 20:20:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 296 transitions. [2023-12-02 20:20:23,563 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 296 transitions. Word has length 37 [2023-12-02 20:20:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:20:23,563 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 296 transitions. [2023-12-02 20:20:23,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 20:20:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 296 transitions. [2023-12-02 20:20:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 20:20:23,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:20:23,564 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:20:23,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-02 20:20:23,564 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:20:23,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:20:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash 518953296, now seen corresponding path program 2 times [2023-12-02 20:20:23,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:20:23,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059874266] [2023-12-02 20:20:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:20:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:20:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:20:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:20:24,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:20:24,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059874266] [2023-12-02 20:20:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059874266] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:20:24,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511442574] [2023-12-02 20:20:24,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:20:24,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:20:24,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:20:24,500 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:20:24,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 20:20:24,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:20:24,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:20:24,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-02 20:20:24,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:20:24,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:20:25,049 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:20:25,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 20:20:25,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:20:25,247 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 20:20:25,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:20:25,367 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 15 treesize of output 7 [2023-12-02 20:20:25,377 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 21 treesize of output 13 [2023-12-02 20:20:25,562 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:20:25,562 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 16 treesize of output 15 [2023-12-02 20:20:25,835 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:20:25,835 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 20 treesize of output 19 [2023-12-02 20:20:25,987 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-02 20:20:25,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 20:20:26,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 20:20:26,162 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:20:26,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2023-12-02 20:20:26,587 INFO L349 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2023-12-02 20:20:26,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 65 [2023-12-02 20:20:26,616 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 20:20:26,616 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 65 treesize of output 60 [2023-12-02 20:20:26,752 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 58 treesize of output 50 [2023-12-02 20:20:27,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:20:27,081 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 26 treesize of output 20 [2023-12-02 20:20:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:20:27,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:20:27,500 WARN L854 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1951 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (forall ((v_ArrVal_1952 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1952) |c_ULTIMATE.start_main_~a~0#1.base|) 8) 0)))) is different from false [2023-12-02 20:20:27,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:20:27,695 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 21 treesize of output 22 [2023-12-02 20:20:27,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:20:27,714 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 35 treesize of output 36 [2023-12-02 20:20:27,719 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 20 treesize of output 18 [2023-12-02 20:20:27,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 20:20:29,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:20:29,770 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 159 treesize of output 164 [2023-12-02 20:20:29,780 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 95 treesize of output 91 [2023-12-02 20:20:30,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 20:20:30,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-12-02 20:20:30,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 20:20:30,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:20:30,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 129 [2023-12-02 20:20:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 20:20:31,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511442574] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:20:31,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113970873] [2023-12-02 20:20:31,079 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 20:20:31,079 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:20:31,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:20:31,080 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:20:31,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:20:35,477 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:21:28,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16066#(and (= 3 (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0)) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= 0 |ULTIMATE.start_main_~p~0#1.base|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 12 (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (exists ((|v_#memory_$Pointer$.base_508| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_295| Int) (|v_#memory_int_523| (Array Int (Array Int Int))) (|v_#valid_219| (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_347| Int) (|v_#memory_$Pointer$.offset_487| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_508| |v_ULTIMATE.start_main_~p~0#1.base_347| (store (select |v_#memory_$Pointer$.base_508| |v_ULTIMATE.start_main_~p~0#1.base_347|) |v_ULTIMATE.start_main_~p~0#1.offset_295| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_347|) |v_ULTIMATE.start_main_~p~0#1.offset_295|))) |#memory_$Pointer$.base|) (= (store |v_#valid_219| |ULTIMATE.start_main_~a~0#1.base| 0) |#valid|) (= (select |v_#valid_219| |v_ULTIMATE.start_main_~p~0#1.base_347|) 1) (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_295|) (= (select |v_#valid_219| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= (+ 4 |v_ULTIMATE.start_main_~p~0#1.offset_295|) (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_347|)) (= |#memory_int| (store |v_#memory_int_523| |v_ULTIMATE.start_main_~p~0#1.base_347| (store (select |v_#memory_int_523| |v_ULTIMATE.start_main_~p~0#1.base_347|) |v_ULTIMATE.start_main_~p~0#1.offset_295| 3))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_487| |v_ULTIMATE.start_main_~p~0#1.base_347| (store (select |v_#memory_$Pointer$.offset_487| |v_ULTIMATE.start_main_~p~0#1.base_347|) |v_ULTIMATE.start_main_~p~0#1.offset_295| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_347|) |v_ULTIMATE.start_main_~p~0#1.offset_295|)))))) (not (= |ULTIMATE.start_main_~a~0#1.base| 0)) (<= |ULTIMATE.start_main_~i~0#1| 20) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~a~0#1.base|) 8) 0) (<= (+ |ULTIMATE.start_main_~a~0#1.base| 1) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~a~0#1.base|) 8) 0) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 20:21:28,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:21:28,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:21:28,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 19] total 48 [2023-12-02 20:21:28,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443377252] [2023-12-02 20:21:28,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:21:28,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 20:21:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:21:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 20:21:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=4565, Unknown=24, NotChecked=138, Total=5112 [2023-12-02 20:21:28,423 INFO L87 Difference]: Start difference. First operand 257 states and 296 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:21:30,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:21:32,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:21:35,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:21:37,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:21:57,986 WARN L854 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1951 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (forall ((v_ArrVal_1952 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1952) |c_ULTIMATE.start_main_~a~0#1.base|) 8) 0)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from false [2023-12-02 20:22:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:22:02,695 INFO L93 Difference]: Finished difference Result 529 states and 588 transitions. [2023-12-02 20:22:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-12-02 20:22:02,696 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 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 38 [2023-12-02 20:22:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:22:02,699 INFO L225 Difference]: With dead ends: 529 [2023-12-02 20:22:02,699 INFO L226 Difference]: Without dead ends: 528 [2023-12-02 20:22:02,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 7124 ImplicationChecksByTransitivity, 76.4s TimeCoverageRelationStatistics Valid=2924, Invalid=18750, Unknown=90, NotChecked=586, Total=22350 [2023-12-02 20:22:02,701 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2092 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 553 mSolverCounterUnsat, 89 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2092 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 89 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:22:02,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2092 Valid, 1072 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 1995 Invalid, 89 Unknown, 597 Unchecked, 14.3s Time] [2023-12-02 20:22:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-12-02 20:22:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 285. [2023-12-02 20:22:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 272 states have (on average 1.2316176470588236) internal successors, (335), 284 states have internal predecessors, (335), 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 20:22:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 335 transitions. [2023-12-02 20:22:02,707 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 335 transitions. Word has length 38 [2023-12-02 20:22:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:22:02,707 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 335 transitions. [2023-12-02 20:22:02,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 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 20:22:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 335 transitions. [2023-12-02 20:22:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 20:22:02,708 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:22:02,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:22:02,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 20:22:02,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 20:22:02,908 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:22:02,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:22:02,909 INFO L85 PathProgramCache]: Analyzing trace with hash 968884233, now seen corresponding path program 1 times [2023-12-02 20:22:02,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:22:02,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990933066] [2023-12-02 20:22:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:22:02,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:22:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:22:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:22:03,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:22:03,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990933066] [2023-12-02 20:22:03,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990933066] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:22:03,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712139100] [2023-12-02 20:22:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:22:03,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:22:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:22:03,505 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:22:03,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 20:22:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:22:03,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 20:22:03,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:22:03,974 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:22:03,975 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 20:22:04,066 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 20:22:04,266 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 20:22:04,266 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 20:22:04,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:22:04,525 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 27 treesize of output 21 [2023-12-02 20:22:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 20:22:04,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:22:04,889 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2025 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2025) |c_ULTIMATE.start_main_~a~0#1.base|) 8) |c_#StackHeapBarrier|)) is different from false [2023-12-02 20:22:04,912 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2025 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8)) v_ArrVal_2025) |c_ULTIMATE.start_main_~a~0#1.base|) 8) |c_#StackHeapBarrier|)) is different from false [2023-12-02 20:22:04,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:22:04,925 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 20 treesize of output 21 [2023-12-02 20:22:04,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:22:04,945 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 32 treesize of output 33 [2023-12-02 20:22:04,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 20:22:05,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:22:05,370 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 28 treesize of output 46 [2023-12-02 20:22:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-12-02 20:22:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712139100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:22:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840342014] [2023-12-02 20:22:05,537 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 20:22:05,538 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:22:05,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:22:05,538 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:22:05,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:22:08,818 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:22:56,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17325#(and (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= |#StackHeapBarrier| |ULTIMATE.start_main_~p~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 20) (= |ULTIMATE.start_main_~p~0#1.offset| 0))' at error location [2023-12-02 20:22:56,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:22:56,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:22:56,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2023-12-02 20:22:56,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573913221] [2023-12-02 20:22:56,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:22:56,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 20:22:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:22:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 20:22:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2933, Unknown=25, NotChecked=222, Total=3422 [2023-12-02 20:22:56,393 INFO L87 Difference]: Start difference. First operand 285 states and 335 transitions. Second operand has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 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 20:23:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:23:01,622 INFO L93 Difference]: Finished difference Result 348 states and 399 transitions. [2023-12-02 20:23:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 20:23:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 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 40 [2023-12-02 20:23:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:23:01,624 INFO L225 Difference]: With dead ends: 348 [2023-12-02 20:23:01,624 INFO L226 Difference]: Without dead ends: 348 [2023-12-02 20:23:01,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=653, Invalid=5810, Unknown=25, NotChecked=318, Total=6806 [2023-12-02 20:23:01,625 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 814 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:23:01,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 533 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 856 Invalid, 0 Unknown, 364 Unchecked, 2.0s Time] [2023-12-02 20:23:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-12-02 20:23:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 288. [2023-12-02 20:23:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 275 states have (on average 1.2327272727272727) internal successors, (339), 287 states have internal predecessors, (339), 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 20:23:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 339 transitions. [2023-12-02 20:23:01,631 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 339 transitions. Word has length 40 [2023-12-02 20:23:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:23:01,631 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 339 transitions. [2023-12-02 20:23:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 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 20:23:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 339 transitions. [2023-12-02 20:23:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 20:23:01,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:23:01,632 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:23:01,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 20:23:01,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:23:01,833 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:23:01,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:23:01,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1557943866, now seen corresponding path program 1 times [2023-12-02 20:23:01,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:23:01,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102033748] [2023-12-02 20:23:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:23:01,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:23:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:23:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:23:02,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:23:02,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102033748] [2023-12-02 20:23:02,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102033748] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:23:02,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031001843] [2023-12-02 20:23:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:23:02,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:23:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:23:02,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:23:02,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 20:23:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:23:02,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 20:23:02,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:23:03,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:23:03,318 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:23:03,319 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 20:23:03,469 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 20:23:03,476 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 20:23:03,602 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 20:23:03,736 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 20:23:03,796 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 20:23:03,822 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:23:03,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 20:23:03,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 20:23:03,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 20:23:04,067 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 20 treesize of output 8 [2023-12-02 20:23:04,200 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 20:23:04,275 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 15 treesize of output 7 [2023-12-02 20:23:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:23:04,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:23:05,598 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 20:23:05,599 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 20:23:05,621 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2139 (Array Int Int)) (v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (< (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2139) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3) (not (= v_ArrVal_2139 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_2139 .cse0))))) (= |v_ULTIMATE.start_main_~t~0#1.base_69| |c_ULTIMATE.start_main_~p~0#1.base|))) is different from false [2023-12-02 20:23:05,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:23:05,871 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 132 treesize of output 136 [2023-12-02 20:23:05,887 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 110 treesize of output 102 [2023-12-02 20:23:05,899 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 102 treesize of output 98 [2023-12-02 20:23:06,001 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 119 treesize of output 115 [2023-12-02 20:23:06,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:23:06,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 74 [2023-12-02 20:23:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 20:23:06,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031001843] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:23:06,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [925563200] [2023-12-02 20:23:06,731 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 20:23:06,731 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:23:06,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:23:06,731 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:23:06,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:23:32,132 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:23:43,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18312#(and (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 20) (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)))' at error location [2023-12-02 20:23:43,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:23:43,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:23:43,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 38 [2023-12-02 20:23:43,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614612978] [2023-12-02 20:23:43,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:23:43,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 20:23:43,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:23:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 20:23:43,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3226, Unknown=37, NotChecked=116, Total=3660 [2023-12-02 20:23:43,083 INFO L87 Difference]: Start difference. First operand 288 states and 339 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 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 20:23:48,054 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (and (= (select |c_#valid| .cse0) 1) (= (select |c_#valid| |c_ULTIMATE.start_main_~p~0#1.base|) 1) (forall ((|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)))) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (forall ((v_ArrVal_2146 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= .cse0 |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3))))) is different from false [2023-12-02 20:23:50,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 20:23:53,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 20:23:55,086 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8))) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (and (= (select |c_#valid| .cse0) 1) (= (select |c_#valid| .cse1) 1) (= (select |c_#valid| |c_ULTIMATE.start_main_~p~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_main_~t~0#1.base|) 1) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (< (select (select (store (store |c_#memory_int| .cse1 v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3))) (forall ((|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)))) (not (= .cse1 |c_ULTIMATE.start_main_~p~0#1.base|)) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (forall ((v_ArrVal_2146 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) 3) (forall ((v_ArrVal_2146 (Array Int Int))) (< (select (select (store |c_#memory_int| .cse1 v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (not (= .cse0 |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3))))) is different from false [2023-12-02 20:23:55,610 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2146 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)))) is different from false [2023-12-02 20:23:59,019 WARN L854 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_main_~p~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_main_~t~0#1.base|) 1) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) 3) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)))) is different from false [2023-12-02 20:23:59,732 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (forall ((v_ArrVal_2146 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from false [2023-12-02 20:24:02,896 WARN L854 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_main_~p~0#1.base|) 1) (forall ((v_ArrVal_2146 (Array Int Int))) (< (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8)) v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3))) is different from false [2023-12-02 20:24:02,976 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 8)))) (and (= (select |c_#valid| .cse0) 1) (= (select |c_#valid| |c_ULTIMATE.start_main_~p~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_main_~t~0#1.base|) 1) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (< (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3))) (not (= .cse0 |c_ULTIMATE.start_main_~p~0#1.base|)) (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) 3) (forall ((v_ArrVal_2146 (Array Int Int))) (< (select (select (store |c_#memory_int| .cse0 v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3)) (forall ((v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2144 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_69| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_69|) 0)) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_2144) |v_ULTIMATE.start_main_~t~0#1.base_69| v_ArrVal_2146) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 3))))) is different from false [2023-12-02 20:24:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:24:06,317 INFO L93 Difference]: Finished difference Result 510 states and 577 transitions. [2023-12-02 20:24:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-02 20:24:06,318 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 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 40 [2023-12-02 20:24:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:24:06,321 INFO L225 Difference]: With dead ends: 510 [2023-12-02 20:24:06,321 INFO L226 Difference]: Without dead ends: 510 [2023-12-02 20:24:06,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 4242 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=1449, Invalid=11624, Unknown=69, NotChecked=1864, Total=15006 [2023-12-02 20:24:06,322 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 964 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 223 mSolverCounterUnsat, 82 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 82 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:24:06,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 1263 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2566 Invalid, 82 Unknown, 692 Unchecked, 12.2s Time] [2023-12-02 20:24:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-12-02 20:24:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 292. [2023-12-02 20:24:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 279 states have (on average 1.2437275985663083) internal successors, (347), 291 states have internal predecessors, (347), 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 20:24:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 347 transitions. [2023-12-02 20:24:06,329 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 347 transitions. Word has length 40 [2023-12-02 20:24:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:24:06,330 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 347 transitions. [2023-12-02 20:24:06,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 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 20:24:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 347 transitions. [2023-12-02 20:24:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 20:24:06,331 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:24:06,331 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 20:24:06,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 20:24:06,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 20:24:06,531 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-02 20:24:06,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:24:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash -734091201, now seen corresponding path program 4 times [2023-12-02 20:24:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:24:06,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353869311] [2023-12-02 20:24:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:24:06,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:24:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:24:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:24:07,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:24:07,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353869311] [2023-12-02 20:24:07,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353869311] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:24:07,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775442961] [2023-12-02 20:24:07,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 20:24:07,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:24:07,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:24:07,889 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:24:07,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18459b6d-5594-43ed-b4e9-f0d7a27f8ca3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 20:24:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:24:08,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 20:24:08,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:24:08,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 20:24:08,386 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 20:24:08,386 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 20:24:08,543 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 20:24:08,874 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 20:24:08,874 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 42 treesize of output 31 [2023-12-02 20:24:08,997 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 20:24:08,997 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 42 treesize of output 31 [2023-12-02 20:24:09,211 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-12-02 20:24:09,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-12-02 20:24:09,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 20:24:09,483 INFO L349 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2023-12-02 20:24:09,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 35 [2023-12-02 20:24:09,983 INFO L349 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2023-12-02 20:24:09,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 84 [2023-12-02 20:24:11,136 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-12-02 20:24:11,136 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 101 treesize of output 51 [2023-12-02 20:24:11,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-12-02 20:24:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:24:11,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:24:12,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:24:12,376 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 70 treesize of output 63 [2023-12-02 20:24:13,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:24:13,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 85 [2023-12-02 20:24:13,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:24:13,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1199 treesize of output 1216 [2023-12-02 20:24:13,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:24:13,351 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 713 treesize of output 517 [2023-12-02 20:24:13,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:24:13,394 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 489 treesize of output 393