./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a 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_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --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 64bit --witnessprinter.graph.data.programhash 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:00:37,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:00:37,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:00:37,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:00:37,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:00:37,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:00:37,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:00:37,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:00:37,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:00:37,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:00:37,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:00:37,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:00:37,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:00:37,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:00:37,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:00:37,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:00:37,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:00:37,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:00:37,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:00:37,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:00:37,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:00:37,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:00:37,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:00:37,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:00:37,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:00:37,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:00:37,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:00:37,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:00:37,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:00:37,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:00:37,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:00:37,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:00:37,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:00:37,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:00:37,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:00:37,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:00:37,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:00:37,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:00:37,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:00:37,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:00:37,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:00:37,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-03 02:00:37,197 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:00:37,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:00:37,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:00:37,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:00:37,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:00:37,198 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:00:37,198 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:00:37,199 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:00:37,199 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:00:37,199 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:00:37,199 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:00:37,199 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:00:37,199 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:00:37,200 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:00:37,200 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:00:37,200 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:00:37,200 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:00:37,200 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:00:37,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:00:37,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:00:37,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:00:37,202 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:00:37,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:00:37,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:00:37,202 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:00:37,202 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:00:37,203 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:00:37,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:00:37,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:00:37,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:00:37,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:00:37,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:00:37,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:00:37,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:00:37,204 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:00:37,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:00:37,205 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:00:37,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:00:37,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:00:37,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2022-11-03 02:00:37,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:00:37,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:00:37,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:00:37,542 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:00:37,545 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:00:37,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-11-03 02:00:37,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/data/820991f58/aa9e24db352045b4bd35058706f19690/FLAGcca56adf6 [2022-11-03 02:00:38,114 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:00:38,115 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-11-03 02:00:38,121 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/data/820991f58/aa9e24db352045b4bd35058706f19690/FLAGcca56adf6 [2022-11-03 02:00:38,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/data/820991f58/aa9e24db352045b4bd35058706f19690 [2022-11-03 02:00:38,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:00:38,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:00:38,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:00:38,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:00:38,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:00:38,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f86fda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38, skipping insertion in model container [2022-11-03 02:00:38,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:00:38,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:00:38,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:00:38,719 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:00:38,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:00:38,763 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:00:38,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38 WrapperNode [2022-11-03 02:00:38,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:00:38,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:00:38,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:00:38,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:00:38,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,814 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-03 02:00:38,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:00:38,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:00:38,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:00:38,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:00:38,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,845 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:00:38,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:00:38,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:00:38,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:00:38,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (1/1) ... [2022-11-03 02:00:38,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:00:38,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:38,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:00:38,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:00:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:00:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:00:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:00:38,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:00:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:00:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:00:39,041 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:00:39,044 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:00:39,259 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:00:39,321 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:00:39,321 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:00:39,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:00:39 BoogieIcfgContainer [2022-11-03 02:00:39,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:00:39,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:00:39,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:00:39,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:00:39,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:00:38" (1/3) ... [2022-11-03 02:00:39,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c90cadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:00:39, skipping insertion in model container [2022-11-03 02:00:39,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:38" (2/3) ... [2022-11-03 02:00:39,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c90cadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:00:39, skipping insertion in model container [2022-11-03 02:00:39,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:00:39" (3/3) ... [2022-11-03 02:00:39,353 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2022-11-03 02:00:39,374 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:00:39,374 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-03 02:00:39,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:00:39,426 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;@28b40e5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:00:39,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-03 02:00:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:00:39,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:39,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:00:39,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash 99305, now seen corresponding path program 1 times [2022-11-03 02:00:39,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:39,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473120772] [2022-11-03 02:00:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:39,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:39,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:39,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473120772] [2022-11-03 02:00:39,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473120772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:39,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:39,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:00:39,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319316109] [2022-11-03 02:00:39,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:39,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:39,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:00:39,756 INFO L87 Difference]: Start difference. First operand has 27 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-11-03 02:00:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:39,854 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-03 02:00:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:39,857 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 [2022-11-03 02:00:39,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:39,867 INFO L225 Difference]: With dead ends: 39 [2022-11-03 02:00:39,867 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 02:00:39,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:00:39,879 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:39,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 02:00:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-11-03 02:00:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.9) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-03 02:00:39,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 3 [2022-11-03 02:00:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:39,935 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-03 02:00:39,935 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) [2022-11-03 02:00:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-03 02:00:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:00:39,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:39,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:00:39,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:00:39,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash 99306, now seen corresponding path program 1 times [2022-11-03 02:00:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:39,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201433310] [2022-11-03 02:00:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:39,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:40,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201433310] [2022-11-03 02:00:40,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201433310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:40,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:40,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:00:40,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292889766] [2022-11-03 02:00:40,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:40,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:40,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:00:40,087 INFO L87 Difference]: Start difference. First operand 30 states and 38 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) [2022-11-03 02:00:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:40,124 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-03 02:00:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:40,125 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 [2022-11-03 02:00:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:40,126 INFO L225 Difference]: With dead ends: 32 [2022-11-03 02:00:40,126 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 02:00:40,126 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 [2022-11-03 02:00:40,134 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:40,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 02:00:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-03 02:00:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-03 02:00:40,140 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 3 [2022-11-03 02:00:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:40,141 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-03 02:00:40,141 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) [2022-11-03 02:00:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-03 02:00:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:00:40,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:40,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-03 02:00:40,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:00:40,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 95488166, now seen corresponding path program 1 times [2022-11-03 02:00:40,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:40,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242111080] [2022-11-03 02:00:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:40,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:40,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:40,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242111080] [2022-11-03 02:00:40,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242111080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:40,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42028330] [2022-11-03 02:00:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:40,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:40,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:40,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:40,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:00:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:00:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:40,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:00:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:40,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:40,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42028330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356925510] [2022-11-03 02:00:40,830 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-03 02:00:40,833 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:40,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:40,849 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:40,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:40,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:00:40,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:00:41,157 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:00:41,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 142 [2022-11-03 02:00:41,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:41,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:41,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:41,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '202#(and (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (<= |ULTIMATE.start_main_~q~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:41,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:41,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:41,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-03 02:00:41,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603277091] [2022-11-03 02:00:41,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:41,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:41,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:00:41,740 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-03 02:00:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:41,925 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-11-03 02:00:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:00:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 5 [2022-11-03 02:00:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:41,927 INFO L225 Difference]: With dead ends: 36 [2022-11-03 02:00:41,927 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 02:00:41,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:00:41,929 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:41,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 02:00:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-03 02:00:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 35 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) [2022-11-03 02:00:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-03 02:00:41,935 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 5 [2022-11-03 02:00:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:41,935 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-03 02:00:41,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-03 02:00:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-03 02:00:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:00:41,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:41,937 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-03 02:00:41,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:42,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:42,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1433174170, now seen corresponding path program 1 times [2022-11-03 02:00:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102845963] [2022-11-03 02:00:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:00:42,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102845963] [2022-11-03 02:00:42,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102845963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889560717] [2022-11-03 02:00:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:42,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:42,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:42,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:42,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:00:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:42,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:00:42,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:42,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889560717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178004754] [2022-11-03 02:00:42,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:42,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:42,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:42,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:42,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:42,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:00:42,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:00:42,700 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:00:42,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 142 [2022-11-03 02:00:42,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:42,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:42,960 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:43,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '369#(and (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_#t~short5#1| (exists ((|v_ULTIMATE.start_main_~q~0#1.base_32| Int) (|v_ULTIMATE.start_main_~q~0#1.offset_28| Int)) (and (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_32|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= |v_ULTIMATE.start_main_~q~0#1.offset_28| 0) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_28|) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_32|) 1) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_32|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)) (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_32|)))) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_~q~0#1.base|) 1)) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:43,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:43,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:43,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2022-11-03 02:00:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539555204] [2022-11-03 02:00:43,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:43,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:00:43,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:00:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:00:43,369 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:43,658 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-03 02:00:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:00:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:00:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:43,660 INFO L225 Difference]: With dead ends: 45 [2022-11-03 02:00:43,660 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 02:00:43,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:00:43,662 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 79 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:43,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 32 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 02:00:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-11-03 02:00:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-03 02:00:43,673 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2022-11-03 02:00:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:43,674 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-03 02:00:43,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-03 02:00:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:00:43,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:43,677 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-11-03 02:00:43,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:00:43,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:43,895 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:43,895 INFO L85 PathProgramCache]: Analyzing trace with hash 691325135, now seen corresponding path program 1 times [2022-11-03 02:00:43,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:43,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406766876] [2022-11-03 02:00:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:43,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:44,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406766876] [2022-11-03 02:00:44,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406766876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921233490] [2022-11-03 02:00:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:44,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:44,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:44,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:44,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:00:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:00:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:44,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:44,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921233490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:44,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042793353] [2022-11-03 02:00:44,666 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:44,666 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:44,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:44,667 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:44,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:44,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:00:44,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:00:44,777 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:00:44,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 142 [2022-11-03 02:00:44,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:44,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:44,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:45,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '647#(and (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_30| Int) (|v_ULTIMATE.start_main_~q~0#1.base_34| Int)) (and (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_34|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_34|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_34|) 1) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_34|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= |v_ULTIMATE.start_main_~q~0#1.offset_30| 0) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_30|))) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_#t~short5#1| (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:45,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:45,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:45,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 02:00:45,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860995905] [2022-11-03 02:00:45,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:45,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:00:45,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:00:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:00:45,367 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:45,466 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-11-03 02:00:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:00:45,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 02:00:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:45,467 INFO L225 Difference]: With dead ends: 63 [2022-11-03 02:00:45,467 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 02:00:45,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:00:45,469 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:45,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 80 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 02:00:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-03 02:00:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 62 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) [2022-11-03 02:00:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-03 02:00:45,475 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 25 [2022-11-03 02:00:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:45,475 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-03 02:00:45,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-03 02:00:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:00:45,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:45,477 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2022-11-03 02:00:45,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:45,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:45,683 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1705035679, now seen corresponding path program 2 times [2022-11-03 02:00:45,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183134884] [2022-11-03 02:00:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:46,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183134884] [2022-11-03 02:00:46,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183134884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839601138] [2022-11-03 02:00:46,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:46,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:46,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:46,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:00:46,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:00:46,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:00:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:46,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:00:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-03 02:00:46,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:46,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839601138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:46,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:46,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [24] total 26 [2022-11-03 02:00:46,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652653195] [2022-11-03 02:00:46,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:46,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:00:46,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:46,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:00:46,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:00:46,907 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-03 02:00:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:46,981 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-11-03 02:00:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:00:46,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 49 [2022-11-03 02:00:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:46,982 INFO L225 Difference]: With dead ends: 75 [2022-11-03 02:00:46,983 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 02:00:46,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:00:46,984 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:46,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 02:00:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-11-03 02:00:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.171875) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-11-03 02:00:46,990 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 49 [2022-11-03 02:00:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:46,991 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-11-03 02:00:46,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-03 02:00:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-11-03 02:00:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:00:46,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:46,993 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:47,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:47,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:47,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2138032191, now seen corresponding path program 1 times [2022-11-03 02:00:47,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:47,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532052371] [2022-11-03 02:00:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:47,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-03 02:00:47,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:47,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532052371] [2022-11-03 02:00:47,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532052371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:47,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:47,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:00:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034876359] [2022-11-03 02:00:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:47,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:00:47,302 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:47,321 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-11-03 02:00:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-03 02:00:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:47,323 INFO L225 Difference]: With dead ends: 68 [2022-11-03 02:00:47,326 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 02:00:47,326 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 [2022-11-03 02:00:47,327 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:47,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 02:00:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-03 02:00:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-03 02:00:47,340 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 51 [2022-11-03 02:00:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:47,341 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-03 02:00:47,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-03 02:00:47,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:00:47,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:47,347 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:47,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:00:47,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:47,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1654565084, now seen corresponding path program 1 times [2022-11-03 02:00:47,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:47,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173302036] [2022-11-03 02:00:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-03 02:00:47,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:47,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173302036] [2022-11-03 02:00:47,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173302036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:47,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:47,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:00:47,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925316218] [2022-11-03 02:00:47,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:47,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:00:47,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:00:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:00:47,540 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:47,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:47,581 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-11-03 02:00:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:00:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-03 02:00:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:47,583 INFO L225 Difference]: With dead ends: 73 [2022-11-03 02:00:47,583 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 02:00:47,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:00:47,584 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:47,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 02:00:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2022-11-03 02:00:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-03 02:00:47,606 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2022-11-03 02:00:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:47,608 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-03 02:00:47,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-03 02:00:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:00:47,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:47,610 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:47,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:00:47,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash 143341699, now seen corresponding path program 1 times [2022-11-03 02:00:47,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:47,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763622074] [2022-11-03 02:00:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:47,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:48,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763622074] [2022-11-03 02:00:48,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763622074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:48,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725307082] [2022-11-03 02:00:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:48,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:48,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:48,380 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:48,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:00:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:00:48,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:48,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:49,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725307082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:49,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895849075] [2022-11-03 02:00:49,463 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 02:00:49,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:49,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:49,463 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:49,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:49,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:00:49,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:49,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 151 treesize of output 141 [2022-11-03 02:00:49,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:49,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:00:49,734 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-03 02:00:49,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:00:49,792 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:50,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1748#(and (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|)) (< |ULTIMATE.start_main_~p~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (not (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) |ULTIMATE.start_main_~q~0#1.offset|))) (or (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_32| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_32|) (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~q~0#1.base|)) (<= |v_ULTIMATE.start_main_~q~0#1.offset_32| 0) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))))))) (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_32| Int)) (and (exists ((|v_ULTIMATE.start_main_~q~0#1.base_36| Int)) (and (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_36|)) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_36|) 1) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_36|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_36|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)))) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_32|) (<= |v_ULTIMATE.start_main_~q~0#1.offset_32| 0) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)))))) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~q~0#1.base|) 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:50,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:50,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:50,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-03 02:00:50,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336957334] [2022-11-03 02:00:50,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:50,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:00:50,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:50,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:00:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1200, Invalid=2106, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:00:50,894 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:51,115 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-11-03 02:00:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:00:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-03 02:00:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:51,117 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:00:51,117 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:00:51,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1200, Invalid=2106, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:00:51,120 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:51,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 42 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:00:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-03 02:00:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0803571428571428) internal successors, (121), 115 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-11-03 02:00:51,126 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 54 [2022-11-03 02:00:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:51,127 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-11-03 02:00:51,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-11-03 02:00:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:00:51,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:51,129 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:51,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:51,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:00:51,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:51,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1795092765, now seen corresponding path program 2 times [2022-11-03 02:00:51,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:51,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571905789] [2022-11-03 02:00:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:53,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571905789] [2022-11-03 02:00:53,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571905789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843538380] [2022-11-03 02:00:53,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:53,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:53,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:53,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:53,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:00:54,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:00:54,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:00:54,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-11-03 02:00:54,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:54,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843538380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:54,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:54,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [48] total 50 [2022-11-03 02:00:54,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331717347] [2022-11-03 02:00:54,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:54,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:00:54,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:54,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:00:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:00:54,534 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-03 02:00:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:54,545 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2022-11-03 02:00:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:00:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 102 [2022-11-03 02:00:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:54,549 INFO L225 Difference]: With dead ends: 134 [2022-11-03 02:00:54,549 INFO L226 Difference]: Without dead ends: 130 [2022-11-03 02:00:54,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:00:54,551 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:54,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-03 02:00:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-03 02:00:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2022-11-03 02:00:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 125 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2022-11-03 02:00:54,574 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 102 [2022-11-03 02:00:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:54,575 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2022-11-03 02:00:54,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-03 02:00:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2022-11-03 02:00:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:00:54,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:54,581 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:54,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:54,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:00:54,807 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:00:54,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1793758094, now seen corresponding path program 1 times [2022-11-03 02:00:54,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:54,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059168796] [2022-11-03 02:00:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:54,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:00:57,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059168796] [2022-11-03 02:00:57,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059168796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249228038] [2022-11-03 02:00:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:57,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:57,063 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:57,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:00:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:00:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:00:57,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:01:00,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249228038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:00,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303196666] [2022-11-03 02:01:00,578 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:01:00,578 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:00,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:00,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:00,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:00,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:01:00,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:01:00,670 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:01:00,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 142 [2022-11-03 02:01:00,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:01:00,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:01:01,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:02,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3306#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:02,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:02,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:02,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-03 02:01:02,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993448809] [2022-11-03 02:01:02,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:02,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-03 02:01:02,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-03 02:01:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2022-11-03 02:01:02,172 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:02,604 INFO L93 Difference]: Finished difference Result 222 states and 231 transitions. [2022-11-03 02:01:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-03 02:01:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 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 102 [2022-11-03 02:01:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:02,607 INFO L225 Difference]: With dead ends: 222 [2022-11-03 02:01:02,607 INFO L226 Difference]: Without dead ends: 222 [2022-11-03 02:01:02,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2022-11-03 02:01:02,610 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:02,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 84 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:01:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-03 02:01:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-11-03 02:01:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 218 states have (on average 1.0596330275229358) internal successors, (231), 221 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) [2022-11-03 02:01:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 231 transitions. [2022-11-03 02:01:02,620 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 231 transitions. Word has length 102 [2022-11-03 02:01:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:02,621 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 231 transitions. [2022-11-03 02:01:02,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 231 transitions. [2022-11-03 02:01:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-03 02:01:02,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:02,626 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:02,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:02,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:01:02,851 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:01:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:02,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1199417038, now seen corresponding path program 2 times [2022-11-03 02:01:02,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:02,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931539270] [2022-11-03 02:01:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:02,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:01:10,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:10,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931539270] [2022-11-03 02:01:10,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931539270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:10,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900573055] [2022-11-03 02:01:10,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:01:10,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:10,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:10,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:10,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:01:10,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:01:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:10,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:01:10,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:10,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:01:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2022-11-03 02:01:11,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2022-11-03 02:01:13,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900573055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:13,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396591613] [2022-11-03 02:01:13,237 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:01:13,237 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:13,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:13,238 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:13,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:13,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:01:13,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:01:13,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 151 treesize of output 141 [2022-11-03 02:01:13,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:01:13,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:01:13,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:15,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5049#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:15,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:15,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:15,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 6, 6] total 108 [2022-11-03 02:01:15,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548760240] [2022-11-03 02:01:15,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:15,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-11-03 02:01:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:15,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-11-03 02:01:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4728, Invalid=8844, Unknown=0, NotChecked=0, Total=13572 [2022-11-03 02:01:15,265 INFO L87 Difference]: Start difference. First operand 222 states and 231 transitions. Second operand has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:24,204 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2022-11-03 02:01:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-03 02:01:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 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 198 [2022-11-03 02:01:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:24,209 INFO L225 Difference]: With dead ends: 278 [2022-11-03 02:01:24,210 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 02:01:24,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 575 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7365 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=15033, Invalid=31839, Unknown=0, NotChecked=0, Total=46872 [2022-11-03 02:01:24,216 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 384 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:24,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 171 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 446 Invalid, 0 Unknown, 45 Unchecked, 0.6s Time] [2022-11-03 02:01:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 02:01:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 246. [2022-11-03 02:01:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 243 states have (on average 1.0905349794238683) internal successors, (265), 245 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 265 transitions. [2022-11-03 02:01:24,223 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 265 transitions. Word has length 198 [2022-11-03 02:01:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:24,224 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 265 transitions. [2022-11-03 02:01:24,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 265 transitions. [2022-11-03 02:01:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-03 02:01:24,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:24,227 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:24,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-03 02:01:24,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:24,435 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:01:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash 248342300, now seen corresponding path program 1 times [2022-11-03 02:01:24,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:24,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198494341] [2022-11-03 02:01:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:24,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9029 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9027 trivial. 0 not checked. [2022-11-03 02:01:24,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:24,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198494341] [2022-11-03 02:01:24,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198494341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:24,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:24,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:01:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070598331] [2022-11-03 02:01:24,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:24,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:01:24,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:24,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:01:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:01:24,649 INFO L87 Difference]: Start difference. First operand 246 states and 265 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-03 02:01:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:24,663 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2022-11-03 02:01:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:01:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 202 [2022-11-03 02:01:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:24,665 INFO L225 Difference]: With dead ends: 242 [2022-11-03 02:01:24,666 INFO L226 Difference]: Without dead ends: 241 [2022-11-03 02:01:24,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:01:24,667 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:24,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:01:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-03 02:01:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-11-03 02:01:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 239 states have (on average 1.0627615062761506) internal successors, (254), 240 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 254 transitions. [2022-11-03 02:01:24,675 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 254 transitions. Word has length 202 [2022-11-03 02:01:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:24,676 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 254 transitions. [2022-11-03 02:01:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-03 02:01:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 254 transitions. [2022-11-03 02:01:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-03 02:01:24,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:24,680 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:24,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:01:24,681 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:01:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:24,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1762626610, now seen corresponding path program 1 times [2022-11-03 02:01:24,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:24,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347773605] [2022-11-03 02:01:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:24,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9029 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:01:31,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:31,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347773605] [2022-11-03 02:01:31,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347773605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:31,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968456332] [2022-11-03 02:01:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:31,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:31,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:31,878 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:01:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-03 02:01:32,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9029 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:01:32,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9029 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:01:43,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968456332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:43,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362402927] [2022-11-03 02:01:43,661 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:01:43,661 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:43,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:43,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:43,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:43,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 02:01:43,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:01:43,733 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:01:43,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 142 [2022-11-03 02:01:43,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:01:43,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 02:01:43,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:43,910 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:43,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 33 [2022-11-03 02:01:43,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:44,002 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:44,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 33 [2022-11-03 02:01:44,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-03 02:01:44,128 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:46,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7701#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (< |ULTIMATE.start_main_~p~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_main_~q~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:46,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:46,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:46,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 194 [2022-11-03 02:01:46,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286612357] [2022-11-03 02:01:46,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-11-03 02:01:46,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-11-03 02:01:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18958, Invalid=23684, Unknown=0, NotChecked=0, Total=42642 [2022-11-03 02:01:46,823 INFO L87 Difference]: Start difference. First operand 241 states and 254 transitions. Second operand has 195 states, 195 states have (on average 2.046153846153846) internal successors, (399), 194 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:48,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:48,009 INFO L93 Difference]: Finished difference Result 435 states and 448 transitions. [2022-11-03 02:01:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-11-03 02:01:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.046153846153846) internal successors, (399), 194 states have internal predecessors, (399), 0 states have call successors, (0), 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 207 [2022-11-03 02:01:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:48,013 INFO L225 Difference]: With dead ends: 435 [2022-11-03 02:01:48,013 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 02:01:48,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 509 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4437 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=18958, Invalid=23684, Unknown=0, NotChecked=0, Total=42642 [2022-11-03 02:01:48,017 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 288 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:48,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 84 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:01:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 02:01:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2022-11-03 02:01:48,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 433 states have (on average 1.0346420323325636) internal successors, (448), 434 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 448 transitions. [2022-11-03 02:01:48,029 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 448 transitions. Word has length 207 [2022-11-03 02:01:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:48,029 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 448 transitions. [2022-11-03 02:01:48,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.046153846153846) internal successors, (399), 194 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 448 transitions. [2022-11-03 02:01:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-03 02:01:48,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:48,039 INFO L195 NwaCegarLoop]: trace histogram [192, 192, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:48,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:48,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:48,263 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:01:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:48,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1256690322, now seen corresponding path program 2 times [2022-11-03 02:01:48,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:48,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379352671] [2022-11-03 02:01:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:48,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36868 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:02:14,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:14,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379352671] [2022-11-03 02:02:14,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379352671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:14,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081175101] [2022-11-03 02:02:14,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:02:14,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:14,259 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:14,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:02:14,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:02:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:14,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:02:14,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36868 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36868 trivial. 0 not checked. [2022-11-03 02:02:16,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:16,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081175101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:16,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:02:16,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [194] total 196 [2022-11-03 02:02:16,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723939518] [2022-11-03 02:02:16,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:16,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:16,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:16,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:16,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18919, Invalid=19693, Unknown=0, NotChecked=0, Total=38612 [2022-11-03 02:02:16,396 INFO L87 Difference]: Start difference. First operand 435 states and 448 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:16,408 INFO L93 Difference]: Finished difference Result 434 states and 447 transitions. [2022-11-03 02:02:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 401 [2022-11-03 02:02:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:16,414 INFO L225 Difference]: With dead ends: 434 [2022-11-03 02:02:16,414 INFO L226 Difference]: Without dead ends: 429 [2022-11-03 02:02:16,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=18919, Invalid=19693, Unknown=0, NotChecked=0, Total=38612 [2022-11-03 02:02:16,420 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:16,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-11-03 02:02:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-03 02:02:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 411. [2022-11-03 02:02:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.0121951219512195) internal successors, (415), 410 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 415 transitions. [2022-11-03 02:02:16,439 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 415 transitions. Word has length 401 [2022-11-03 02:02:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:16,440 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 415 transitions. [2022-11-03 02:02:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 415 transitions. [2022-11-03 02:02:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-11-03 02:02:16,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:16,448 INFO L195 NwaCegarLoop]: trace histogram [192, 192, 4, 4, 3, 3, 3, 1, 1, 1] [2022-11-03 02:02:16,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:16,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:02:16,663 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:02:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:16,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2018820262, now seen corresponding path program 3 times [2022-11-03 02:02:16,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:16,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5036203] [2022-11-03 02:02:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:16,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36888 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:02:41,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:41,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5036203] [2022-11-03 02:02:41,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5036203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:41,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020144561] [2022-11-03 02:02:41,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:02:41,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:41,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:41,646 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:41,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc3b777-a514-4caf-93e0-414b48849113/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process