./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta --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 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- 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-dbf71c6-m [2022-10-17 17:23:00,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:23:00,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:23:00,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:23:00,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:23:00,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:23:00,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:23:00,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:23:00,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:23:00,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:23:00,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:23:00,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:23:00,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:23:00,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:23:00,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:23:00,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:23:00,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:23:00,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:23:00,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:23:00,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:23:00,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:23:00,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:23:00,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:23:00,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:23:00,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:23:00,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:23:00,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:23:00,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:23:00,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:23:00,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:23:00,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:23:00,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:23:00,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:23:00,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:23:00,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:23:00,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:23:00,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:23:00,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:23:00,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:23:00,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:23:00,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:23:00,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-10-17 17:23:00,423 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:23:00,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:23:00,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:23:00,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:23:00,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:23:00,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:23:00,425 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:23:00,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:23:00,425 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:23:00,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:23:00,427 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:23:00,427 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:23:00,427 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:23:00,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 17:23:00,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 17:23:00,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:23:00,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:23:00,429 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 17:23:00,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:23:00,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:23:00,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:23:00,430 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 17:23:00,430 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 17:23:00,430 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 17:23:00,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:23:00,431 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:23:00,431 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:23:00,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:23:00,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:23:00,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:23:00,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:00,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:23:00,432 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:23:00,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:23:00,433 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:23:00,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:23:00,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:23:00,434 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_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-10-17 17:23:00,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:23:00,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:23:00,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:23:00,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:23:00,729 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:23:00,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-10-17 17:23:00,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/data/e560f9105/8a3c67b9b0c64c2d894a19f5a4f2852b/FLAGee8963729 [2022-10-17 17:23:01,304 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:23:01,304 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-10-17 17:23:01,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/data/e560f9105/8a3c67b9b0c64c2d894a19f5a4f2852b/FLAGee8963729 [2022-10-17 17:23:01,643 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/data/e560f9105/8a3c67b9b0c64c2d894a19f5a4f2852b [2022-10-17 17:23:01,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:23:01,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:23:01,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:01,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:23:01,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:23:01,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:01" (1/1) ... [2022-10-17 17:23:01,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1174c032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:01, skipping insertion in model container [2022-10-17 17:23:01,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:01" (1/1) ... [2022-10-17 17:23:01,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:23:01,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:23:02,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:02,191 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:23:02,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:02,315 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:23:02,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02 WrapperNode [2022-10-17 17:23:02,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:02,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:02,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:23:02,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:23:02,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,400 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-10-17 17:23:02,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:02,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:23:02,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:23:02,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:23:02,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,446 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:23:02,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:23:02,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:23:02,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:23:02,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:02,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:02,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:23:02,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:23:02,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:23:02,551 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-10-17 17:23:02,551 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-10-17 17:23:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:23:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:23:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:23:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:23:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:23:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:23:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:23:02,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:23:02,667 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:23:02,670 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:23:03,030 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:03,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:03,074 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:23:03,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:03 BoogieIcfgContainer [2022-10-17 17:23:03,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:03,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:03,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:03,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:03,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:23:01" (1/3) ... [2022-10-17 17:23:03,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce46f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:03, skipping insertion in model container [2022-10-17 17:23:03,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02" (2/3) ... [2022-10-17 17:23:03,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce46f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:03, skipping insertion in model container [2022-10-17 17:23:03,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:03" (3/3) ... [2022-10-17 17:23:03,086 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-10-17 17:23:03,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:03,108 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-10-17 17:23:03,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:03,169 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;@63273c18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:03,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-10-17 17:23:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 17:23:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 17:23:03,191 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:03,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 17:23:03,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2022-10-17 17:23:03,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:03,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619523375] [2022-10-17 17:23:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:03,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:03,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:03,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619523375] [2022-10-17 17:23:03,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619523375] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:03,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:03,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:23:03,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328860030] [2022-10-17 17:23:03,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:03,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:23:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:23:03,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:23:03,666 INFO L87 Difference]: Start difference. First operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:03,829 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2022-10-17 17:23:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:23:03,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-17 17:23:03,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:03,844 INFO L225 Difference]: With dead ends: 118 [2022-10-17 17:23:03,844 INFO L226 Difference]: Without dead ends: 115 [2022-10-17 17:23:03,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:23:03,850 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:03,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 112 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-10-17 17:23:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2022-10-17 17:23:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 79 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-10-17 17:23:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-10-17 17:23:03,906 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 5 [2022-10-17 17:23:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:03,907 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-10-17 17:23:03,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-10-17 17:23:03,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 17:23:03,908 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:03,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 17:23:03,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:23:03,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2022-10-17 17:23:03,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:03,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653490807] [2022-10-17 17:23:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:03,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:04,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653490807] [2022-10-17 17:23:04,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653490807] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:04,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:04,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:04,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512335421] [2022-10-17 17:23:04,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:04,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:04,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:04,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:04,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:04,243 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:04,414 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-10-17 17:23:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:23:04,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-17 17:23:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:04,423 INFO L225 Difference]: With dead ends: 214 [2022-10-17 17:23:04,425 INFO L226 Difference]: Without dead ends: 214 [2022-10-17 17:23:04,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:04,428 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 116 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:04,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 197 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-10-17 17:23:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2022-10-17 17:23:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.6484375) internal successors, (211), 145 states have internal predecessors, (211), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-10-17 17:23:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 256 transitions. [2022-10-17 17:23:04,470 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 256 transitions. Word has length 5 [2022-10-17 17:23:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:04,471 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 256 transitions. [2022-10-17 17:23:04,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 256 transitions. [2022-10-17 17:23:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:23:04,491 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:04,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 17:23:04,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:23:04,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2022-10-17 17:23:04,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:04,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643048281] [2022-10-17 17:23:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:04,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:04,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643048281] [2022-10-17 17:23:04,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643048281] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:04,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:04,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:04,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809879612] [2022-10-17 17:23:04,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:04,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:04,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:04,769 INFO L87 Difference]: Start difference. First operand 163 states and 256 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:04,980 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2022-10-17 17:23:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:04,981 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 17:23:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:04,988 INFO L225 Difference]: With dead ends: 237 [2022-10-17 17:23:04,989 INFO L226 Difference]: Without dead ends: 237 [2022-10-17 17:23:04,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:04,997 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 133 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:04,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 154 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-10-17 17:23:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 166. [2022-10-17 17:23:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.633587786259542) internal successors, (214), 148 states have internal predecessors, (214), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-10-17 17:23:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 259 transitions. [2022-10-17 17:23:05,042 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 259 transitions. Word has length 6 [2022-10-17 17:23:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:05,043 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 259 transitions. [2022-10-17 17:23:05,044 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 259 transitions. [2022-10-17 17:23:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:23:05,045 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:05,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:05,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:23:05,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2022-10-17 17:23:05,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:05,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093565735] [2022-10-17 17:23:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:05,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:05,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093565735] [2022-10-17 17:23:05,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093565735] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:05,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:05,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:05,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158527277] [2022-10-17 17:23:05,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:05,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:05,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:05,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:05,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:05,414 INFO L87 Difference]: Start difference. First operand 166 states and 259 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:05,571 INFO L93 Difference]: Finished difference Result 216 states and 302 transitions. [2022-10-17 17:23:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:05,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:23:05,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:05,574 INFO L225 Difference]: With dead ends: 216 [2022-10-17 17:23:05,574 INFO L226 Difference]: Without dead ends: 216 [2022-10-17 17:23:05,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:05,576 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 118 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:05,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 175 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-10-17 17:23:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2022-10-17 17:23:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.618320610687023) internal successors, (212), 148 states have internal predecessors, (212), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-10-17 17:23:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 257 transitions. [2022-10-17 17:23:05,592 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 257 transitions. Word has length 7 [2022-10-17 17:23:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:05,593 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 257 transitions. [2022-10-17 17:23:05,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 257 transitions. [2022-10-17 17:23:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:23:05,594 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:05,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:05,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:23:05,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2022-10-17 17:23:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:05,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052286292] [2022-10-17 17:23:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:05,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:05,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:05,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052286292] [2022-10-17 17:23:05,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052286292] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:05,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:05,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:05,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573577312] [2022-10-17 17:23:05,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:05,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:05,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:05,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:05,670 INFO L87 Difference]: Start difference. First operand 166 states and 257 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:05,789 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2022-10-17 17:23:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:05,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:23:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:05,792 INFO L225 Difference]: With dead ends: 244 [2022-10-17 17:23:05,793 INFO L226 Difference]: Without dead ends: 244 [2022-10-17 17:23:05,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:05,794 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 175 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:05,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-10-17 17:23:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2022-10-17 17:23:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 164 states have (on average 1.5914634146341464) internal successors, (261), 182 states have internal predecessors, (261), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-10-17 17:23:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 306 transitions. [2022-10-17 17:23:05,810 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 306 transitions. Word has length 8 [2022-10-17 17:23:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:05,810 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 306 transitions. [2022-10-17 17:23:05,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 306 transitions. [2022-10-17 17:23:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:23:05,811 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:05,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:05,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:23:05,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2022-10-17 17:23:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:05,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260324055] [2022-10-17 17:23:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:05,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:05,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:05,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260324055] [2022-10-17 17:23:05,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260324055] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:05,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:05,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357728829] [2022-10-17 17:23:05,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:05,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:05,911 INFO L87 Difference]: Start difference. First operand 201 states and 306 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:06,042 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2022-10-17 17:23:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:06,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:23:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:06,045 INFO L225 Difference]: With dead ends: 239 [2022-10-17 17:23:06,045 INFO L226 Difference]: Without dead ends: 239 [2022-10-17 17:23:06,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:06,047 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 156 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:06,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 182 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-10-17 17:23:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2022-10-17 17:23:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 173 states have (on average 1.583815028901734) internal successors, (274), 192 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-10-17 17:23:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 319 transitions. [2022-10-17 17:23:06,060 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 319 transitions. Word has length 9 [2022-10-17 17:23:06,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:06,061 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 319 transitions. [2022-10-17 17:23:06,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 319 transitions. [2022-10-17 17:23:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:23:06,062 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:06,062 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:06,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:23:06,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2022-10-17 17:23:06,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:06,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397760415] [2022-10-17 17:23:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:06,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:06,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397760415] [2022-10-17 17:23:06,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397760415] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:06,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420977787] [2022-10-17 17:23:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:06,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:06,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:06,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:06,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:23:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:06,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:23:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:06,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:06,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420977787] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:06,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899518230] [2022-10-17 17:23:06,762 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-10-17 17:23:06,762 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:06,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:06,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:06,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:06,890 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-10-17 17:23:09,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:23:13,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2449#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (<= 0 ~global~0.base) (<= |parse_input_~input#1.base| 3) (= |parse_input_#in~input#1.base| 3) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= ~global~0.base 0) (= |old(~global~0.base)| 0) (= |#NULL.offset| 0) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-10-17 17:23:13,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:23:13,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:23:13,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-10-17 17:23:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336779676] [2022-10-17 17:23:13,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:23:13,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:23:13,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:23:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-10-17 17:23:13,514 INFO L87 Difference]: Start difference. First operand 211 states and 319 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:13,805 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2022-10-17 17:23:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:23:13,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 17:23:13,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:13,809 INFO L225 Difference]: With dead ends: 293 [2022-10-17 17:23:13,809 INFO L226 Difference]: Without dead ends: 293 [2022-10-17 17:23:13,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:23:13,810 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 402 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:13,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 381 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-10-17 17:23:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 223. [2022-10-17 17:23:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 182 states have (on average 1.5054945054945055) internal successors, (274), 204 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2022-10-17 17:23:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 329 transitions. [2022-10-17 17:23:13,825 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 329 transitions. Word has length 13 [2022-10-17 17:23:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:13,825 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 329 transitions. [2022-10-17 17:23:13,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 329 transitions. [2022-10-17 17:23:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:23:13,827 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:13,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:13,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:14,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:14,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2022-10-17 17:23:14,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:14,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542381106] [2022-10-17 17:23:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542381106] [2022-10-17 17:23:14,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542381106] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408541951] [2022-10-17 17:23:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:14,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:14,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:23:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:23:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:14,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-10-17 17:23:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408541951] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:14,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207433284] [2022-10-17 17:23:14,558 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-10-17 17:23:14,558 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:14,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:14,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:14,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:14,596 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-10-17 17:23:16,612 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:23:20,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1207433284] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:20,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:23:20,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 15 [2022-10-17 17:23:20,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704776533] [2022-10-17 17:23:20,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:20,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:23:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:23:20,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:23:20,480 INFO L87 Difference]: Start difference. First operand 223 states and 329 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:21,459 INFO L93 Difference]: Finished difference Result 211 states and 290 transitions. [2022-10-17 17:23:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:23:21,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-17 17:23:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:21,463 INFO L225 Difference]: With dead ends: 211 [2022-10-17 17:23:21,463 INFO L226 Difference]: Without dead ends: 211 [2022-10-17 17:23:21,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:23:21,464 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 45 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:21,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 133 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:23:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-10-17 17:23:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-10-17 17:23:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.485207100591716) internal successors, (251), 192 states have internal predecessors, (251), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-10-17 17:23:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 284 transitions. [2022-10-17 17:23:21,477 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 284 transitions. Word has length 14 [2022-10-17 17:23:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:21,477 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 284 transitions. [2022-10-17 17:23:21,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 284 transitions. [2022-10-17 17:23:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:23:21,479 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:21,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:21,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:21,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 17:23:21,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:21,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash 351522922, now seen corresponding path program 1 times [2022-10-17 17:23:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:21,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492368942] [2022-10-17 17:23:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:21,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:21,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:21,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492368942] [2022-10-17 17:23:21,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492368942] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:21,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:21,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038095622] [2022-10-17 17:23:21,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:21,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:21,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:21,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:21,763 INFO L87 Difference]: Start difference. First operand 205 states and 284 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:23:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:21,778 INFO L93 Difference]: Finished difference Result 211 states and 288 transitions. [2022-10-17 17:23:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-10-17 17:23:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:21,783 INFO L225 Difference]: With dead ends: 211 [2022-10-17 17:23:21,783 INFO L226 Difference]: Without dead ends: 211 [2022-10-17 17:23:21,783 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 [2022-10-17 17:23:21,785 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 112 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 [2022-10-17 17:23:21,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 112 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-10-17 17:23:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-10-17 17:23:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.467455621301775) internal successors, (248), 192 states have internal predecessors, (248), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-10-17 17:23:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 281 transitions. [2022-10-17 17:23:21,799 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 281 transitions. Word has length 23 [2022-10-17 17:23:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:21,799 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 281 transitions. [2022-10-17 17:23:21,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:23:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 281 transitions. [2022-10-17 17:23:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 17:23:21,800 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:21,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:21,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:23:21,801 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-17 17:23:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:21,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1643273810, now seen corresponding path program 1 times [2022-10-17 17:23:21,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:21,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348332947] [2022-10-17 17:23:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:21,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:22,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:22,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348332947] [2022-10-17 17:23:22,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348332947] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:22,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426749009] [2022-10-17 17:23:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:22,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:22,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:22,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976ff2e7-b6e8-4422-bbf1-e96129c54e42/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:23:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 17:23:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:22,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 17:23:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:22,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:22,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426749009] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:22,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66903157] [2022-10-17 17:23:22,715 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-10-17 17:23:22,715 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:22,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:22,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:22,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:22,874 INFO L356 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-10-17 17:23:22,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-10-17 17:23:23,202 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-10-17 17:23:23,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-10-17 17:23:23,578 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-10-17 17:23:24,608 INFO L180 IcfgInterpreter]: Interpretation finished