./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.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_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/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_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/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_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/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 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 --- 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 02:37:38,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:37:38,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:37:38,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:37:38,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:37:38,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:37:38,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:37:38,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:37:38,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:37:38,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:37:38,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:37:38,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:37:38,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:37:38,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:37:38,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:37:38,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:37:38,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:37:38,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:37:38,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:37:38,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:37:38,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:37:38,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:37:38,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:37:38,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:37:38,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:37:38,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:37:38,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:37:38,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:37:38,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:37:38,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:37:38,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:37:38,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:37:38,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:37:38,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:37:38,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:37:38,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:37:38,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:37:38,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:37:38,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:37:38,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:37:38,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:37:38,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-03 02:37:38,469 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:37:38,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:37:38,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:37:38,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:37:38,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:37:38,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:37:38,471 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:37:38,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:37:38,472 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:37:38,472 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:37:38,472 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:37:38,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:37:38,473 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:37:38,473 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:37:38,473 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:37:38,474 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:37:38,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:37:38,474 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:37:38,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:37:38,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:37:38,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:37:38,476 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:37:38,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:37:38,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:37:38,477 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:37:38,477 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:37:38,477 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:37:38,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:37:38,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:37:38,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:37:38,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:37:38,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:37:38,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:37:38,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:37:38,479 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:37:38,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:37:38,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:37:38,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:37:38,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:37:38,481 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_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2022-11-03 02:37:38,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:37:38,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:37:38,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:37:38,895 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:37:38,896 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:37:38,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2022-11-03 02:37:38,988 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/data/868cc5b81/29922d20ce0a41d48b1786ed20561a49/FLAG965637faf [2022-11-03 02:37:39,528 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:37:39,528 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2022-11-03 02:37:39,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/data/868cc5b81/29922d20ce0a41d48b1786ed20561a49/FLAG965637faf [2022-11-03 02:37:39,888 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/data/868cc5b81/29922d20ce0a41d48b1786ed20561a49 [2022-11-03 02:37:39,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:37:39,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:37:39,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:37:39,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:37:39,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:37:39,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:37:39" (1/1) ... [2022-11-03 02:37:39,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731e4543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:39, skipping insertion in model container [2022-11-03 02:37:39,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:37:39" (1/1) ... [2022-11-03 02:37:39,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:37:39,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:37:40,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:37:40,194 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:37:40,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:37:40,241 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:37:40,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40 WrapperNode [2022-11-03 02:37:40,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:37:40,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:37:40,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:37:40,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:37:40,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,284 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2022-11-03 02:37:40,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:37:40,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:37:40,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:37:40,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:37:40,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,312 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:37:40,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:37:40,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:37:40,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:37:40,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (1/1) ... [2022-11-03 02:37:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:37:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:40,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:37:40,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:37:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:37:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:37:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:37:40,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:37:40,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:37:40,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:37:40,521 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:37:40,523 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:37:40,714 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:37:40,747 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:37:40,747 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:37:40,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:37:40 BoogieIcfgContainer [2022-11-03 02:37:40,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:37:40,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:37:40,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:37:40,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:37:40,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:37:39" (1/3) ... [2022-11-03 02:37:40,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4697ee82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:37:40, skipping insertion in model container [2022-11-03 02:37:40,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:37:40" (2/3) ... [2022-11-03 02:37:40,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4697ee82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:37:40, skipping insertion in model container [2022-11-03 02:37:40,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:37:40" (3/3) ... [2022-11-03 02:37:40,770 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2022-11-03 02:37:40,802 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:37:40,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-03 02:37:40,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:37:40,864 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;@75c5f905, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:37:40,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-03 02:37:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 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 02:37:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:37:40,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:40,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:37:40,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash 92437, now seen corresponding path program 1 times [2022-11-03 02:37:40,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:40,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498853275] [2022-11-03 02:37:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:41,185 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 02:37:41,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:41,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498853275] [2022-11-03 02:37:41,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498853275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:41,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:41,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:37:41,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842903474] [2022-11-03 02:37:41,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:41,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:37:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:41,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:37:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:37:41,232 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 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, 3 states have (on average 1.0) 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 02:37:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:41,312 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-03 02:37:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:37:41,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 02:37:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:41,325 INFO L225 Difference]: With dead ends: 29 [2022-11-03 02:37:41,325 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 02:37:41,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:37:41,348 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:41,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:37:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 02:37:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-11-03 02:37:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 13 states have (on average 2.076923076923077) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 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 02:37:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-03 02:37:41,411 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 3 [2022-11-03 02:37:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:41,412 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-03 02:37:41,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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 02:37:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-03 02:37:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:37:41,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:41,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:37:41,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:37:41,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:41,416 INFO L85 PathProgramCache]: Analyzing trace with hash 90656, now seen corresponding path program 1 times [2022-11-03 02:37:41,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:41,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657406811] [2022-11-03 02:37:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:41,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:41,483 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 02:37:41,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:41,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657406811] [2022-11-03 02:37:41,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657406811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:41,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:41,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:37:41,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725937976] [2022-11-03 02:37:41,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:41,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:37:41,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:41,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:37:41,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:37:41,489 INFO L87 Difference]: Start difference. First operand 25 states and 27 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 02:37:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:41,532 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-11-03 02:37:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:37:41,533 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 02:37:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:41,534 INFO L225 Difference]: With dead ends: 23 [2022-11-03 02:37:41,534 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 02:37:41,535 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 02:37:41,537 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:41,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 02:37:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 02:37:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 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 02:37:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-03 02:37:41,543 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 3 [2022-11-03 02:37:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:41,543 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-03 02:37:41,543 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 02:37:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-03 02:37:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:37:41,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:41,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:37:41,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:37:41,545 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 02:37:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash 90657, now seen corresponding path program 1 times [2022-11-03 02:37:41,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:41,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474721311] [2022-11-03 02:37:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:41,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:41,688 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 02:37:41,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474721311] [2022-11-03 02:37:41,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474721311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:41,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:41,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:37:41,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378286520] [2022-11-03 02:37:41,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:41,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:37:41,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:37:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:37:41,692 INFO L87 Difference]: Start difference. First operand 23 states and 25 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 02:37:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:41,741 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-11-03 02:37:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:37:41,742 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 02:37:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:41,743 INFO L225 Difference]: With dead ends: 24 [2022-11-03 02:37:41,743 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 02:37:41,743 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 02:37:41,745 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:41,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 02:37:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-03 02:37:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 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 02:37:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-11-03 02:37:41,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 3 [2022-11-03 02:37:41,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:41,752 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-11-03 02:37:41,752 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 02:37:41,752 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-11-03 02:37:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:37:41,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:41,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:37:41,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:37:41,754 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 02:37:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash 87170569, now seen corresponding path program 1 times [2022-11-03 02:37:41,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:41,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568494941] [2022-11-03 02:37:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:41,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:41,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:41,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568494941] [2022-11-03 02:37:41,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568494941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:41,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605509127] [2022-11-03 02:37:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:41,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:41,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:41,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:41,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:37:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:37:41,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:42,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:42,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605509127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:42,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771377062] [2022-11-03 02:37:42,143 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-03 02:37:42,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:37:42,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:37:42,155 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:37:42,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:37:42,240 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 02:37:42,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:42,531 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:37:42,536 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 129 treesize of output 130 [2022-11-03 02:37:42,795 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 02:37:42,839 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 02:37:42,901 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:37:43,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [771377062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:43,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:43,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2022-11-03 02:37:43,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912797671] [2022-11-03 02:37:43,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:43,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:37:43,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:37:43,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:37:43,245 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:43,659 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-11-03 02:37:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:37:43,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:37:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:43,661 INFO L225 Difference]: With dead ends: 48 [2022-11-03 02:37:43,661 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:37:43,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:37:43,667 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:43,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 8 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:37:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:37:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2022-11-03 02:37:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-11-03 02:37:43,682 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 5 [2022-11-03 02:37:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:43,683 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-11-03 02:37:43,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-11-03 02:37:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:37:43,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:43,685 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-03 02:37:43,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:43,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:43,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash 87168789, now seen corresponding path program 1 times [2022-11-03 02:37:43,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:43,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521989309] [2022-11-03 02:37:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:44,096 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 02:37:44,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521989309] [2022-11-03 02:37:44,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521989309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:44,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648285955] [2022-11-03 02:37:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:44,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:44,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:44,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:37:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:44,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:37:44,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:44,180 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 02:37:44,243 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 02:37:44,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:44,338 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 02:37:44,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648285955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130756014] [2022-11-03 02:37:44,341 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-03 02:37:44,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:37:44,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:37:44,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:37:44,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:37:44,357 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 02:37:44,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:44,482 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:37:44,482 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 129 treesize of output 130 [2022-11-03 02:37:44,582 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 02:37:44,613 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 02:37:44,623 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:37:44,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '335#(and (<= |ULTIMATE.start_main_#t~nondet2#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet2#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (<= (+ |ULTIMATE.start_main_~p~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~p~0#1.base|))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:37:44,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:37:44,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:44,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-03 02:37:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957853551] [2022-11-03 02:37:44,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:37:44,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:37:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:37:44,863 INFO L87 Difference]: Start difference. First operand 33 states and 41 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 02:37:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:45,104 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2022-11-03 02:37:45,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:37:45,105 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 02:37:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:45,106 INFO L225 Difference]: With dead ends: 91 [2022-11-03 02:37:45,107 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 02:37:45,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:37:45,108 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 164 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:45,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 30 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:37:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 02:37:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 33. [2022-11-03 02:37:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-11-03 02:37:45,118 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 5 [2022-11-03 02:37:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:45,132 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-11-03 02:37:45,133 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 02:37:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-11-03 02:37:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:37:45,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:45,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:45,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:45,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:45,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:45,349 INFO L85 PathProgramCache]: Analyzing trace with hash 615744763, now seen corresponding path program 1 times [2022-11-03 02:37:45,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:45,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441747228] [2022-11-03 02:37:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:45,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:37:45,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441747228] [2022-11-03 02:37:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441747228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:45,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:45,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:37:45,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630382844] [2022-11-03 02:37:45,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:45,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:37:45,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:45,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:37:45,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:37:45,445 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 02:37:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:45,479 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-03 02:37:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:37:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:37:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:45,483 INFO L225 Difference]: With dead ends: 31 [2022-11-03 02:37:45,483 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:37:45,483 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 02:37:45,486 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:45,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:37:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-03 02:37:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 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 02:37:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-03 02:37:45,500 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 10 [2022-11-03 02:37:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:45,501 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-03 02:37:45,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 02:37:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-03 02:37:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:37:45,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:45,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:45,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:37:45,504 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:45,505 INFO L85 PathProgramCache]: Analyzing trace with hash 615744764, now seen corresponding path program 1 times [2022-11-03 02:37:45,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:45,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900835115] [2022-11-03 02:37:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:45,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:37:45,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:45,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900835115] [2022-11-03 02:37:45,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900835115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:45,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994023294] [2022-11-03 02:37:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:45,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:45,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:45,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:45,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:37:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:37:45,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:37:45,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:37:45,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994023294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:45,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448127224] [2022-11-03 02:37:45,764 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:37:45,765 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:37:45,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:37:45,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:37:45,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:37:45,797 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 02:37:45,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:45,914 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:37:45,914 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 129 treesize of output 130 [2022-11-03 02:37:46,009 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 02:37:46,028 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 02:37:46,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:37:46,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '595#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 02:37:46,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:37:46,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:46,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-03 02:37:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278948602] [2022-11-03 02:37:46,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:46,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:37:46,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:37:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:37:46,782 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:46,832 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-03 02:37:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:37:46,833 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:37:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:46,833 INFO L225 Difference]: With dead ends: 38 [2022-11-03 02:37:46,834 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 02:37:46,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:37:46,835 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:46,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 02:37:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-03 02:37:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.40625) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 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 02:37:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-11-03 02:37:46,839 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 10 [2022-11-03 02:37:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:46,839 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-11-03 02:37:46,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-11-03 02:37:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:37:46,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:46,840 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:46,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:47,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:47,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:47,041 INFO L85 PathProgramCache]: Analyzing trace with hash -966191828, now seen corresponding path program 2 times [2022-11-03 02:37:47,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:47,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918234046] [2022-11-03 02:37:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:47,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:37:47,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:47,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918234046] [2022-11-03 02:37:47,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918234046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380751021] [2022-11-03 02:37:47,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:37:47,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:47,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:47,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:47,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:37:47,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:37:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:37:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:37:47,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:37:47,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380751021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:47,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920616347] [2022-11-03 02:37:47,555 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:37:47,555 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:37:47,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:37:47,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:37:47,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:37:47,578 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 02:37:47,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:37:47,676 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 139 treesize of output 129 [2022-11-03 02:37:47,768 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 02:37:47,803 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 02:37:47,968 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:37:48,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '796#(and (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (or (and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.base| 0)) (and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |#NULL.offset| 0) (= |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 02:37:48,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:37:48,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:48,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 17 [2022-11-03 02:37:48,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830896233] [2022-11-03 02:37:48,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:48,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:37:48,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:37:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:37:48,512 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 02:37:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:48,920 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-11-03 02:37:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:37:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 18 [2022-11-03 02:37:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:48,922 INFO L225 Difference]: With dead ends: 80 [2022-11-03 02:37:48,922 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 02:37:48,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:37:48,924 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 202 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:48,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 22 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:37:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 02:37:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2022-11-03 02:37:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 55 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-11-03 02:37:48,930 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 18 [2022-11-03 02:37:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:48,930 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-11-03 02:37:48,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 02:37:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-11-03 02:37:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:37:48,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:48,932 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:48,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:49,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:49,153 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:49,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1245795391, now seen corresponding path program 1 times [2022-11-03 02:37:49,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:49,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777554904] [2022-11-03 02:37:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:49,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:37:49,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777554904] [2022-11-03 02:37:49,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777554904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:49,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:49,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:37:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314304426] [2022-11-03 02:37:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:49,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:37:49,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:37:49,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:37:49,200 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 02:37:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:49,213 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-11-03 02:37:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:37:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 02:37:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:49,216 INFO L225 Difference]: With dead ends: 55 [2022-11-03 02:37:49,217 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 02:37:49,217 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 02:37:49,218 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 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 02:37:49,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 02:37:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-03 02:37:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 54 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-11-03 02:37:49,224 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 20 [2022-11-03 02:37:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:49,225 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-11-03 02:37:49,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 02:37:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-11-03 02:37:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:37:49,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:49,226 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:37:49,227 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 02:37:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1086502110, now seen corresponding path program 1 times [2022-11-03 02:37:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017701073] [2022-11-03 02:37:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:49,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017701073] [2022-11-03 02:37:49,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017701073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389217774] [2022-11-03 02:37:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:49,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:49,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:49,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:49,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:37:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:37:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:49,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:49,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389217774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:49,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894525651] [2022-11-03 02:37:49,714 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:37:49,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:37:49,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:37:49,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:37:49,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:37:49,732 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 02:37:49,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:49,800 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:37:49,801 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 129 treesize of output 130 [2022-11-03 02:37:49,894 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 02:37:49,911 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 02:37:49,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:37:49,980 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:37:50,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1220#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (< |ULTIMATE.start_main_~p~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) (+ (- 4) |ULTIMATE.start_main_~p~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) (+ (- 4) |ULTIMATE.start_main_~p~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= (+ |ULTIMATE.start_main_~p~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (= |#NULL.offset| 0) (= |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) (< (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) |ULTIMATE.start_main_~q~0#1.offset|) 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:37:50,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:37:50,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:50,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-03 02:37:50,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663969628] [2022-11-03 02:37:50,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:50,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:37:50,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:50,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:37:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:37:50,730 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:50,806 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-11-03 02:37:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:37:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 02:37:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:50,808 INFO L225 Difference]: With dead ends: 73 [2022-11-03 02:37:50,808 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 02:37:50,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:37:50,809 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:50,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 55 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:37:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 02:37:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-03 02:37:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 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 02:37:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-11-03 02:37:50,814 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 22 [2022-11-03 02:37:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:50,815 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-11-03 02:37:50,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-11-03 02:37:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:37:50,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:50,816 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:50,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:37:51,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:51,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1369689586, now seen corresponding path program 2 times [2022-11-03 02:37:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429543670] [2022-11-03 02:37:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:51,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429543670] [2022-11-03 02:37:51,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429543670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010244675] [2022-11-03 02:37:51,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:37:51,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:51,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:51,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:51,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:37:51,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:37:51,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:37:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-11-03 02:37:51,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:51,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010244675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:51,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:37:51,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [18] total 20 [2022-11-03 02:37:51,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711203631] [2022-11-03 02:37:51,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:37:51,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:51,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:37:51,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:37:51,887 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:51,894 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-11-03 02:37:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:37:51,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:37:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:51,895 INFO L225 Difference]: With dead ends: 79 [2022-11-03 02:37:51,895 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 02:37:51,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:37:51,897 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:51,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-03 02:37:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 02:37:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-03 02:37:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 72 states have (on average 1.25) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 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 02:37:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-11-03 02:37:51,903 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 40 [2022-11-03 02:37:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:51,904 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-11-03 02:37:51,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-11-03 02:37:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:37:51,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:51,906 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:51,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:52,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:52,125 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash -887511168, now seen corresponding path program 1 times [2022-11-03 02:37:52,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:52,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17036424] [2022-11-03 02:37:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:52,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:52,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:52,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17036424] [2022-11-03 02:37:52,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17036424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:52,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256603773] [2022-11-03 02:37:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:52,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:52,604 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:52,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:37:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:37:52,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:52,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:53,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256603773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:53,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584249794] [2022-11-03 02:37:53,437 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:37:53,438 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:37:53,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:37:53,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:37:53,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:37:53,466 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 02:37:53,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:37:53,562 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 139 treesize of output 129 [2022-11-03 02:37:53,625 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 02:37:53,662 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 02:37:53,800 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 02:37:53,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:37:54,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1955#(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|)) (= (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 02:37:54,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:37:54,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:54,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2022-11-03 02:37:54,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728134087] [2022-11-03 02:37:54,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:54,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:37:54,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:54,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:37:54,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1368, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:37:54,414 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 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 02:37:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:54,596 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2022-11-03 02:37:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 02:37:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 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 43 [2022-11-03 02:37:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:54,598 INFO L225 Difference]: With dead ends: 111 [2022-11-03 02:37:54,598 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 02:37:54,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=702, Invalid=1368, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:37:54,600 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:54,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 55 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:37:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 02:37:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-03 02:37:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 110 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-11-03 02:37:54,621 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 43 [2022-11-03 02:37:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:54,622 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-11-03 02:37:54,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 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 02:37:54,622 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-11-03 02:37:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:37:54,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:54,630 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:54,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:54,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:37:54,857 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:54,858 INFO L85 PathProgramCache]: Analyzing trace with hash -455937112, now seen corresponding path program 2 times [2022-11-03 02:37:54,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:54,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785895688] [2022-11-03 02:37:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:54,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:56,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:56,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785895688] [2022-11-03 02:37:56,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785895688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:56,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392356786] [2022-11-03 02:37:56,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:37:56,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:56,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:56,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:56,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:37:56,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:37:56,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:37:56,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:37:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2022-11-03 02:37:57,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:57,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392356786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:57,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:37:57,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [36] total 38 [2022-11-03 02:37:57,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229309853] [2022-11-03 02:37:57,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:57,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:37:57,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:37:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:37:57,303 INFO L87 Difference]: Start difference. First operand 111 states and 126 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 02:37:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:57,310 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2022-11-03 02:37:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:37:57,311 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 79 [2022-11-03 02:37:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:57,312 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:37:57,312 INFO L226 Difference]: Without dead ends: 127 [2022-11-03 02:37:57,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:37:57,314 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:57,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-03 02:37:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-03 02:37:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2022-11-03 02:37:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 121 states have internal predecessors, (142), 0 states have call successors, (0), 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 02:37:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2022-11-03 02:37:57,321 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 79 [2022-11-03 02:37:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:57,322 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2022-11-03 02:37:57,322 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 02:37:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2022-11-03 02:37:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:37:57,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:57,325 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:57,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-03 02:37:57,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:37:57,539 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:37:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:57,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1312925323, now seen corresponding path program 1 times [2022-11-03 02:37:57,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:57,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967414630] [2022-11-03 02:37:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:57,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2022-11-03 02:37:57,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:57,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967414630] [2022-11-03 02:37:57,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967414630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:57,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:57,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:37:57,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235236468] [2022-11-03 02:37:57,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:57,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:37:57,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:37:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:37:57,675 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 02:37:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:57,688 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2022-11-03 02:37:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:37:57,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 81 [2022-11-03 02:37:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:57,690 INFO L225 Difference]: With dead ends: 121 [2022-11-03 02:37:57,690 INFO L226 Difference]: Without dead ends: 121 [2022-11-03 02:37:57,690 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 02:37:57,691 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:57,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-03 02:37:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2022-11-03 02:37:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 109 states have internal predecessors, (123), 0 states have call successors, (0), 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 02:37:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2022-11-03 02:37:57,697 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 81 [2022-11-03 02:37:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:57,698 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2022-11-03 02:37:57,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 02:37:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2022-11-03 02:37:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:37:57,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:57,700 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:57,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:37:57,701 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 02:37:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:57,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1727545523, now seen corresponding path program 1 times [2022-11-03 02:37:57,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:57,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658885148] [2022-11-03 02:37:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:57,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:59,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:59,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658885148] [2022-11-03 02:37:59,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658885148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:59,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844553009] [2022-11-03 02:37:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:59,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:59,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:59,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:59,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:37:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:37:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:59,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:38:02,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844553009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:02,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801052923] [2022-11-03 02:38:02,222 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 02:38:02,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:38:02,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:38:02,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:38:02,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:38:02,241 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 02:38:02,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:02,319 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:38:02,319 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 129 treesize of output 130 [2022-11-03 02:38:02,405 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 02:38:02,420 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 02:38:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:02,471 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 0 case distinctions, treesize of input 51 treesize of output 33 [2022-11-03 02:38:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:02,516 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 0 case distinctions, treesize of input 51 treesize of output 33 [2022-11-03 02:38:02,593 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 02:38:02,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:38:03,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3499#(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 02:38:03,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:38:03,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:38:03,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 72 [2022-11-03 02:38:03,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814430120] [2022-11-03 02:38:03,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:03,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-03 02:38:03,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:38:03,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-03 02:38:03,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2672, Invalid=4300, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 02:38:03,836 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 0 states have call successors, (0), 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 02:38:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:04,178 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2022-11-03 02:38:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-03 02:38:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 0 states have call successors, (0), 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 81 [2022-11-03 02:38:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:04,180 INFO L225 Difference]: With dead ends: 182 [2022-11-03 02:38:04,180 INFO L226 Difference]: Without dead ends: 182 [2022-11-03 02:38:04,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2672, Invalid=4300, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 02:38:04,187 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:04,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 20 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:38:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-03 02:38:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-11-03 02:38:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.0833333333333333) internal successors, (195), 181 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 195 transitions. [2022-11-03 02:38:04,202 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 195 transitions. Word has length 81 [2022-11-03 02:38:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:04,202 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 195 transitions. [2022-11-03 02:38:04,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 0 states have call successors, (0), 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 02:38:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 195 transitions. [2022-11-03 02:38:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:38:04,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:04,214 INFO L195 NwaCegarLoop]: trace histogram [70, 70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:04,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:04,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:38:04,441 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:38:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash -672159843, now seen corresponding path program 2 times [2022-11-03 02:38:04,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:04,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091350737] [2022-11-03 02:38:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:04,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:38:09,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091350737] [2022-11-03 02:38:09,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091350737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508814601] [2022-11-03 02:38:09,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:38:09,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:09,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:09,770 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:09,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:38:09,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:38:09,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:38:09,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:38:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4902 trivial. 0 not checked. [2022-11-03 02:38:10,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:10,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508814601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:10,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:38:10,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [72] total 74 [2022-11-03 02:38:10,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756953669] [2022-11-03 02:38:10,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:10,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:38:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:38:10,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:38:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:38:10,851 INFO L87 Difference]: Start difference. First operand 182 states and 195 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:10,854 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2022-11-03 02:38:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:38:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-11-03 02:38:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:10,856 INFO L225 Difference]: With dead ends: 181 [2022-11-03 02:38:10,856 INFO L226 Difference]: Without dead ends: 177 [2022-11-03 02:38:10,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:38:10,858 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:10,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-11-03 02:38:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-03 02:38:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2022-11-03 02:38:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0368098159509203) internal successors, (169), 163 states have internal predecessors, (169), 0 states have call successors, (0), 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 02:38:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 169 transitions. [2022-11-03 02:38:10,865 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 169 transitions. Word has length 153 [2022-11-03 02:38:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:10,866 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 169 transitions. [2022-11-03 02:38:10,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 169 transitions. [2022-11-03 02:38:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:38:10,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:10,869 INFO L195 NwaCegarLoop]: trace histogram [70, 70, 4, 4, 4, 1, 1, 1] [2022-11-03 02:38:10,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:11,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:11,089 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:38:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1926096718, now seen corresponding path program 3 times [2022-11-03 02:38:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:11,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665880337] [2022-11-03 02:38:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:38:15,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665880337] [2022-11-03 02:38:15,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665880337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:15,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966130206] [2022-11-03 02:38:15,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:38:15,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:15,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:15,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:39:37,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:39:37,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:39:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 02:39:37,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:39:37,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:39:44,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966130206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:44,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747402350] [2022-11-03 02:39:44,580 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:39:44,580 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:39:44,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:39:44,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:39:44,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:39:44,598 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 02:39:44,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:39:44,664 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 139 treesize of output 129 [2022-11-03 02:39:44,702 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 02:39:44,725 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 02:39:44,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:39:45,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5819#(and (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (or (and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.base| 0)) (and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |#NULL.offset| 0) (= |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 02:39:45,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:39:45,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:39:45,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 144 [2022-11-03 02:39:45,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881590341] [2022-11-03 02:39:45,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:45,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-03 02:39:45,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-03 02:39:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10459, Invalid=12191, Unknown=0, NotChecked=0, Total=22650 [2022-11-03 02:39:45,616 INFO L87 Difference]: Start difference. First operand 164 states and 169 transitions. Second operand has 145 states, 145 states have (on average 2.0068965517241377) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 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 02:39:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:46,423 INFO L93 Difference]: Finished difference Result 308 states and 313 transitions. [2022-11-03 02:39:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-03 02:39:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0068965517241377) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 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 155 [2022-11-03 02:39:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:46,425 INFO L225 Difference]: With dead ends: 308 [2022-11-03 02:39:46,426 INFO L226 Difference]: Without dead ends: 308 [2022-11-03 02:39:46,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=10459, Invalid=12191, Unknown=0, NotChecked=0, Total=22650 [2022-11-03 02:39:46,431 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 213 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:46,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 30 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:39:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-03 02:39:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-11-03 02:39:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.019543973941368) internal successors, (313), 307 states have internal predecessors, (313), 0 states have call successors, (0), 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 02:39:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 313 transitions. [2022-11-03 02:39:46,440 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 313 transitions. Word has length 155 [2022-11-03 02:39:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:46,440 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 313 transitions. [2022-11-03 02:39:46,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0068965517241377) internal successors, (291), 144 states have internal predecessors, (291), 0 states have call successors, (0), 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 02:39:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 313 transitions. [2022-11-03 02:39:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-11-03 02:39:46,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:46,443 INFO L195 NwaCegarLoop]: trace histogram [142, 142, 4, 4, 4, 1, 1, 1] [2022-11-03 02:39:46,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:46,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:39:46,644 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:39:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:46,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1401462766, now seen corresponding path program 4 times [2022-11-03 02:39:46,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:46,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551756840] [2022-11-03 02:39:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:46,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20186 backedges. 0 proven. 20164 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:40:02,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551756840] [2022-11-03 02:40:02,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551756840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:02,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058948486] [2022-11-03 02:40:02,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:40:02,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:02,257 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:02,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:40:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:02,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 144 conjunts are in the unsatisfiable core [2022-11-03 02:40:02,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20186 backedges. 0 proven. 20164 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:40:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20186 backedges. 0 proven. 20164 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:40:31,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058948486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:31,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137540480] [2022-11-03 02:40:31,166 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:40:31,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:40:31,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:40:31,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:40:31,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:40:31,179 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 02:40:31,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:31,245 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:31,246 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 129 treesize of output 130 [2022-11-03 02:40:31,323 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 02:40:31,343 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 02:40:31,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:40:33,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8518#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 02:40:33,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:40:33,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:40:33,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144, 144] total 288 [2022-11-03 02:40:33,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792709880] [2022-11-03 02:40:33,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:33,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 289 states [2022-11-03 02:40:33,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:33,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 289 interpolants. [2022-11-03 02:40:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41630, Invalid=45100, Unknown=0, NotChecked=0, Total=86730 [2022-11-03 02:40:33,226 INFO L87 Difference]: Start difference. First operand 308 states and 313 transitions. Second operand has 289 states, 289 states have (on average 2.0034602076124566) internal successors, (579), 288 states have internal predecessors, (579), 0 states have call successors, (0), 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 02:40:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:36,156 INFO L93 Difference]: Finished difference Result 596 states and 601 transitions. [2022-11-03 02:40:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2022-11-03 02:40:36,158 INFO L78 Accepts]: Start accepts. Automaton has has 289 states, 289 states have (on average 2.0034602076124566) internal successors, (579), 288 states have internal predecessors, (579), 0 states have call successors, (0), 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 299 [2022-11-03 02:40:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:36,161 INFO L225 Difference]: With dead ends: 596 [2022-11-03 02:40:36,161 INFO L226 Difference]: Without dead ends: 596 [2022-11-03 02:40:36,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=41630, Invalid=45100, Unknown=0, NotChecked=0, Total=86730 [2022-11-03 02:40:36,168 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 429 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:36,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 35 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:40:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-03 02:40:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-11-03 02:40:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 1.0100840336134453) internal successors, (601), 595 states have internal predecessors, (601), 0 states have call successors, (0), 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 02:40:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 601 transitions. [2022-11-03 02:40:36,183 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 601 transitions. Word has length 299 [2022-11-03 02:40:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:36,184 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 601 transitions. [2022-11-03 02:40:36,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 289 states, 289 states have (on average 2.0034602076124566) internal successors, (579), 288 states have internal predecessors, (579), 0 states have call successors, (0), 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 02:40:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 601 transitions. [2022-11-03 02:40:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-11-03 02:40:36,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:36,202 INFO L195 NwaCegarLoop]: trace histogram [286, 286, 4, 4, 4, 1, 1, 1] [2022-11-03 02:40:36,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:36,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:40:36,425 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:40:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1875881682, now seen corresponding path program 5 times [2022-11-03 02:40:36,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:36,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152826741] [2022-11-03 02:40:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:36,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 81818 backedges. 0 proven. 81796 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:41:40,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:40,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152826741] [2022-11-03 02:41:40,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152826741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:40,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060829916] [2022-11-03 02:41:40,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:41:40,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:40,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:40,681 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:40,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:41:41,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:41:41,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:41,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:41:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81818 backedges. 286 proven. 22 refuted. 0 times theorem prover too weak. 81510 trivial. 0 not checked. [2022-11-03 02:41:42,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:43,590 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-11-03 02:41:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 81818 backedges. 286 proven. 22 refuted. 0 times theorem prover too weak. 81510 trivial. 0 not checked. [2022-11-03 02:41:43,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060829916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:43,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533567422] [2022-11-03 02:41:43,609 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:41:43,609 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:41:43,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:41:43,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:41:43,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:41:43,618 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 02:41:43,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:41:43,672 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:41:43,673 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 129 treesize of output 130 [2022-11-03 02:41:43,732 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 02:41:43,744 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 02:41:43,858 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:41:46,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13537#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 02:41:46,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:41:46,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:41:46,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [288, 9, 9] total 305 [2022-11-03 02:41:46,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433589533] [2022-11-03 02:41:46,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:46,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 305 states [2022-11-03 02:41:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 305 interpolants. [2022-11-03 02:41:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41992, Invalid=54418, Unknown=0, NotChecked=0, Total=96410 [2022-11-03 02:41:46,390 INFO L87 Difference]: Start difference. First operand 596 states and 601 transitions. Second operand has 305 states, 305 states have (on average 2.00327868852459) internal successors, (611), 305 states have internal predecessors, (611), 0 states have call successors, (0), 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 02:42:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:36,507 INFO L93 Difference]: Finished difference Result 639 states and 649 transitions. [2022-11-03 02:42:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2022-11-03 02:42:36,509 INFO L78 Accepts]: Start accepts. Automaton has has 305 states, 305 states have (on average 2.00327868852459) internal successors, (611), 305 states have internal predecessors, (611), 0 states have call successors, (0), 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 587 [2022-11-03 02:42:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:36,513 INFO L225 Difference]: With dead ends: 639 [2022-11-03 02:42:36,513 INFO L226 Difference]: Without dead ends: 639 [2022-11-03 02:42:36,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2350 GetRequests, 1738 SyntacticMatches, 0 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53404 ImplicationChecksByTransitivity, 84.2s TimeCoverageRelationStatistics Valid=125791, Invalid=250591, Unknown=0, NotChecked=0, Total=376382 [2022-11-03 02:42:36,530 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1124 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:36,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 26 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:42:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-03 02:42:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 623. [2022-11-03 02:42:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.017684887459807) internal successors, (633), 622 states have internal predecessors, (633), 0 states have call successors, (0), 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 02:42:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 633 transitions. [2022-11-03 02:42:36,542 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 633 transitions. Word has length 587 [2022-11-03 02:42:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:36,543 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 633 transitions. [2022-11-03 02:42:36,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 305 states, 305 states have (on average 2.00327868852459) internal successors, (611), 305 states have internal predecessors, (611), 0 states have call successors, (0), 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 02:42:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 633 transitions. [2022-11-03 02:42:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2022-11-03 02:42:36,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:36,560 INFO L195 NwaCegarLoop]: trace histogram [287, 287, 9, 9, 9, 1, 1, 1] [2022-11-03 02:42:36,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 02:42:36,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:36,785 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-03 02:42:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1928274472, now seen corresponding path program 6 times [2022-11-03 02:42:36,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:36,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559008430] [2022-11-03 02:42:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:36,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 82486 backedges. 0 proven. 82369 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 02:43:35,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:35,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559008430] [2022-11-03 02:43:35,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559008430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:35,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786761920] [2022-11-03 02:43:35,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:43:35,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:35,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:35,157 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:35,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73efd4a4-bfb0-4a2e-8761-e7cbde68ac3d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process