./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI --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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:30:58,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:58,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:58,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:58,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:58,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:58,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:58,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:58,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:58,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:58,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:58,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:58,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:58,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:58,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:58,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:58,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:58,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:58,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:58,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:58,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:58,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:58,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:58,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:58,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:58,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:58,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:58,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:58,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:58,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:58,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:58,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:58,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:58,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:58,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:58,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:58,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:58,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:58,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:58,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:58,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:58,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:30:58,672 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:58,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:58,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:58,674 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:58,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:58,674 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:58,675 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:30:58,675 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:58,675 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:58,676 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:30:58,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:30:58,677 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:58,677 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:30:58,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:30:58,678 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:30:58,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:30:58,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:30:58,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:58,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:30:58,680 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:30:58,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:30:58,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:30:58,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:58,681 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:30:58,681 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:30:58,682 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:30:58,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:58,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:30:58,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:30:58,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:58,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:58,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:58,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:58,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:58,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:58,685 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:30:58,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:30:58,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:58,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:58,686 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2021-10-11 02:30:59,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:59,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:59,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:59,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:59,058 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:59,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-10-11 02:30:59,154 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/data/f1f648c27/3a30b6f1ff534e4bb03f86a6abe515fb/FLAG950d50173 [2021-10-11 02:30:59,621 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:59,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-10-11 02:30:59,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/data/f1f648c27/3a30b6f1ff534e4bb03f86a6abe515fb/FLAG950d50173 [2021-10-11 02:30:59,981 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/data/f1f648c27/3a30b6f1ff534e4bb03f86a6abe515fb [2021-10-11 02:30:59,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:59,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:59,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:59,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:59,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:59,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:59" (1/1) ... [2021-10-11 02:30:59,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f543a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:59, skipping insertion in model container [2021-10-11 02:30:59,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:59" (1/1) ... [2021-10-11 02:31:00,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:00,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:00,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:00,210 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:00,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:00,236 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:00,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00 WrapperNode [2021-10-11 02:31:00,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:00,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:00,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:00,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:00,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:00,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:00,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:00,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:00,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... [2021-10-11 02:31:00,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:00,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:00,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:00,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:00,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:31:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:00,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:31:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:31:00,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:00,939 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-11 02:31:00,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:00 BoogieIcfgContainer [2021-10-11 02:31:00,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:00,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:00,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:00,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:00,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:59" (1/3) ... [2021-10-11 02:31:00,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f735935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:00, skipping insertion in model container [2021-10-11 02:31:00,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:00" (2/3) ... [2021-10-11 02:31:00,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f735935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:00, skipping insertion in model container [2021-10-11 02:31:00,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:00" (3/3) ... [2021-10-11 02:31:00,952 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2021-10-11 02:31:00,967 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:00,972 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2021-10-11 02:31:01,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-11 02:31:01,029 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:01,029 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:31:01,029 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:01,030 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:01,030 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:01,030 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:01,030 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:01,030 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-10-11 02:31:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:31:01,053 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:01,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:31:01,054 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2021-10-11 02:31:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:01,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738226195] [2021-10-11 02:31:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:01,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738226195] [2021-10-11 02:31:01,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:01,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:01,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466381043] [2021-10-11 02:31:01,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:01,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:01,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:01,290 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2021-10-11 02:31:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:01,396 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-10-11 02:31:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:01,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:31:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:01,418 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:31:01,418 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:31:01,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:01,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:31:01,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-10-11 02:31:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:31:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-11 02:31:01,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2021-10-11 02:31:01,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:01,464 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-11 02:31:01,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-11 02:31:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:31:01,465 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:01,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:31:01,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:01,466 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:01,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:01,467 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2021-10-11 02:31:01,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:01,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551982346] [2021-10-11 02:31:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:01,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551982346] [2021-10-11 02:31:01,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:01,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:01,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883659374] [2021-10-11 02:31:01,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:01,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:01,557 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2021-10-11 02:31:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:01,694 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-11 02:31:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:31:01,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:31:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:01,698 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:31:01,698 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:31:01,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:31:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:31:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2021-10-11 02:31:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:31:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-10-11 02:31:01,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2021-10-11 02:31:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:01,705 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-10-11 02:31:01,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-10-11 02:31:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:31:01,706 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:01,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:31:01,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:01,706 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2021-10-11 02:31:01,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:01,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014936473] [2021-10-11 02:31:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:01,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014936473] [2021-10-11 02:31:01,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:01,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:31:01,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408696432] [2021-10-11 02:31:01,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:01,794 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2021-10-11 02:31:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:01,818 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-10-11 02:31:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:01,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:31:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:01,820 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:31:01,820 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:31:01,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:31:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:31:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:31:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-11 02:31:01,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2021-10-11 02:31:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:01,825 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-11 02:31:01,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-11 02:31:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:31:01,826 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:01,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:31:01,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:31:01,827 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash 3080753, now seen corresponding path program 1 times [2021-10-11 02:31:01,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:01,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591731193] [2021-10-11 02:31:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:01,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591731193] [2021-10-11 02:31:01,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:01,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:01,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005590458] [2021-10-11 02:31:01,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:01,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:01,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:01,947 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2021-10-11 02:31:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:02,016 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-11 02:31:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:02,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:31:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:02,017 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:31:02,018 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:31:02,019 INFO L677 BasicCegarLoop]: 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 [2021-10-11 02:31:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:31:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:31:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:31:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-11 02:31:02,028 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2021-10-11 02:31:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:02,028 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-11 02:31:02,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-11 02:31:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:31:02,029 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:02,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:02,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:31:02,032 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1585672413, now seen corresponding path program 1 times [2021-10-11 02:31:02,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:02,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692676271] [2021-10-11 02:31:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:02,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692676271] [2021-10-11 02:31:02,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526340583] [2021-10-11 02:31:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:02,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:31:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:02,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:02,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828600716] [2021-10-11 02:31:02,304 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:02,304 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:02,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:02,315 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:02,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:03,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:03,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:03,503 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:04,213 WARN L197 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 86 [2021-10-11 02:31:04,782 WARN L197 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2021-10-11 02:31:05,218 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-10-11 02:31:05,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:05,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2021-10-11 02:31:05,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062984677] [2021-10-11 02:31:05,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:31:05,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:31:05,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:31:05,224 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2021-10-11 02:31:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:05,369 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-10-11 02:31:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:31:05,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-10-11 02:31:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:05,371 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:31:05,371 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:31:05,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:31:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:31:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-11 02:31:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:31:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-11 02:31:05,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2021-10-11 02:31:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:05,375 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-11 02:31:05,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:31:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-11 02:31:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:31:05,376 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:05,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:05,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:05,583 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash 596146973, now seen corresponding path program 1 times [2021-10-11 02:31:05,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:05,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125494192] [2021-10-11 02:31:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:05,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125494192] [2021-10-11 02:31:05,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527382456] [2021-10-11 02:31:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:05,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:31:05,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:05,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:05,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591629544] [2021-10-11 02:31:05,871 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:05,871 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:05,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:05,872 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:05,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:06,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:06,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:06,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:06,902 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:07,072 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:31:07,564 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:07,717 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-10-11 02:31:07,939 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:08,105 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-10-11 02:31:08,284 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:08,287 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:08,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:08,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-10-11 02:31:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776052350] [2021-10-11 02:31:08,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:31:08,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:31:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:31:08,290 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2021-10-11 02:31:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:08,572 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-10-11 02:31:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-11 02:31:08,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2021-10-11 02:31:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:08,575 INFO L225 Difference]: With dead ends: 64 [2021-10-11 02:31:08,575 INFO L226 Difference]: Without dead ends: 64 [2021-10-11 02:31:08,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-10-11 02:31:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-11 02:31:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2021-10-11 02:31:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:31:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-10-11 02:31:08,581 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2021-10-11 02:31:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:08,582 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-10-11 02:31:08,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:31:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-10-11 02:31:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:31:08,583 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:08,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:08,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:08,806 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:08,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:08,807 INFO L82 PathProgramCache]: Analyzing trace with hash 596149066, now seen corresponding path program 1 times [2021-10-11 02:31:08,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:08,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318148429] [2021-10-11 02:31:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318148429] [2021-10-11 02:31:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806598983] [2021-10-11 02:31:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 02:31:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:09,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:09,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146570167] [2021-10-11 02:31:09,175 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:09,175 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:09,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:09,176 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:09,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:09,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:09,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:09,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:10,123 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:10,315 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-10-11 02:31:10,846 WARN L197 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:11,018 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-10-11 02:31:11,204 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:11,345 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-10-11 02:31:11,509 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:11,510 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:11,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:11,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2021-10-11 02:31:11,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988774669] [2021-10-11 02:31:11,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:31:11,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:11,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:31:11,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:31:11,513 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 10 states. [2021-10-11 02:31:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:11,631 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-10-11 02:31:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:31:11,632 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2021-10-11 02:31:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:11,633 INFO L225 Difference]: With dead ends: 61 [2021-10-11 02:31:11,633 INFO L226 Difference]: Without dead ends: 61 [2021-10-11 02:31:11,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:31:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-11 02:31:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2021-10-11 02:31:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-11 02:31:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2021-10-11 02:31:11,658 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 10 [2021-10-11 02:31:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:11,661 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2021-10-11 02:31:11,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:31:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2021-10-11 02:31:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:31:11,661 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:11,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:11,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:11,862 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash 188329252, now seen corresponding path program 1 times [2021-10-11 02:31:11,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:11,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866679003] [2021-10-11 02:31:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:31:11,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866679003] [2021-10-11 02:31:11,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926707001] [2021-10-11 02:31:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:31:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:12,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:12,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043235443] [2021-10-11 02:31:12,071 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:31:12,071 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:12,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:12,072 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:12,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:12,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:12,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:12,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:12,803 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:13,254 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:13,408 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-10-11 02:31:13,589 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:13,713 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-10-11 02:31:13,842 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:13,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:13,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 4, 4] total 16 [2021-10-11 02:31:13,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807447736] [2021-10-11 02:31:13,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:31:13,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:13,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:31:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:31:13,933 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 8 states. [2021-10-11 02:31:14,297 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2021-10-11 02:31:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:14,427 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-10-11 02:31:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:31:14,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-10-11 02:31:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:14,429 INFO L225 Difference]: With dead ends: 54 [2021-10-11 02:31:14,429 INFO L226 Difference]: Without dead ends: 54 [2021-10-11 02:31:14,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:31:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-11 02:31:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-11 02:31:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-11 02:31:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2021-10-11 02:31:14,433 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2021-10-11 02:31:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:14,433 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2021-10-11 02:31:14,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:31:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2021-10-11 02:31:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:31:14,434 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:14,434 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:31:14,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-10-11 02:31:14,635 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:14,636 INFO L82 PathProgramCache]: Analyzing trace with hash 188258073, now seen corresponding path program 2 times [2021-10-11 02:31:14,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:14,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123330707] [2021-10-11 02:31:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:14,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123330707] [2021-10-11 02:31:14,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:14,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:14,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357216060] [2021-10-11 02:31:14,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:14,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:14,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:14,700 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 3 states. [2021-10-11 02:31:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:14,730 INFO L93 Difference]: Finished difference Result 81 states and 110 transitions. [2021-10-11 02:31:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:14,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-10-11 02:31:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:14,732 INFO L225 Difference]: With dead ends: 81 [2021-10-11 02:31:14,732 INFO L226 Difference]: Without dead ends: 81 [2021-10-11 02:31:14,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-11 02:31:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-10-11 02:31:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-10-11 02:31:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2021-10-11 02:31:14,737 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 13 [2021-10-11 02:31:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:14,737 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-10-11 02:31:14,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2021-10-11 02:31:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:31:14,738 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:14,738 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:31:14,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-10-11 02:31:14,739 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:14,739 INFO L82 PathProgramCache]: Analyzing trace with hash 521636203, now seen corresponding path program 3 times [2021-10-11 02:31:14,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:14,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677978628] [2021-10-11 02:31:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:31:14,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677978628] [2021-10-11 02:31:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785921508] [2021-10-11 02:31:14,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:14,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:31:14,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:31:14,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:31:14,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:31:14,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:31:14,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802524877] [2021-10-11 02:31:14,915 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:14,916 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:14,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:14,916 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:14,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:14,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:15,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:15,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:15,584 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:15,729 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:31:16,205 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:16,481 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:16,756 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:16,757 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:16,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:16,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-10-11 02:31:16,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664374875] [2021-10-11 02:31:16,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:31:16,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:31:16,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:31:16,759 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 8 states. [2021-10-11 02:31:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:16,857 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-11 02:31:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:31:16,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-10-11 02:31:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:16,859 INFO L225 Difference]: With dead ends: 52 [2021-10-11 02:31:16,859 INFO L226 Difference]: Without dead ends: 52 [2021-10-11 02:31:16,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:31:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-11 02:31:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-10-11 02:31:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 02:31:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2021-10-11 02:31:16,863 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 13 [2021-10-11 02:31:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:16,863 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2021-10-11 02:31:16,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:31:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2021-10-11 02:31:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:31:16,864 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:16,864 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2021-10-11 02:31:17,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-10-11 02:31:17,078 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033020, now seen corresponding path program 1 times [2021-10-11 02:31:17,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:17,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718448190] [2021-10-11 02:31:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:17,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718448190] [2021-10-11 02:31:17,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601420113] [2021-10-11 02:31:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:17,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 02:31:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:17,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:17,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703566834] [2021-10-11 02:31:17,274 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:17,274 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:17,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:17,275 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:17,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:17,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:17,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:17,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:17,983 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:18,137 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-10-11 02:31:18,508 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:18,761 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:19,018 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:19,019 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:19,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:19,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 4 [2021-10-11 02:31:19,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177895540] [2021-10-11 02:31:19,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:31:19,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:19,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:31:19,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:31:19,021 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 5 states. [2021-10-11 02:31:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:19,053 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-10-11 02:31:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:19,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-10-11 02:31:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:19,054 INFO L225 Difference]: With dead ends: 44 [2021-10-11 02:31:19,054 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 02:31:19,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:31:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 02:31:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-11 02:31:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-11 02:31:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-10-11 02:31:19,058 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2021-10-11 02:31:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:19,058 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-10-11 02:31:19,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:31:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-10-11 02:31:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:31:19,059 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:19,059 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2021-10-11 02:31:19,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-10-11 02:31:19,270 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033021, now seen corresponding path program 1 times [2021-10-11 02:31:19,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:19,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191773679] [2021-10-11 02:31:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:19,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191773679] [2021-10-11 02:31:19,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006219101] [2021-10-11 02:31:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:19,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 02:31:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:19,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:19,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744137686] [2021-10-11 02:31:19,483 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:19,483 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:19,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:19,483 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:19,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:19,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:19,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:19,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:20,127 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:20,261 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-10-11 02:31:20,619 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:20,880 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:20,998 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-10-11 02:31:21,127 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:21,127 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:21,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:21,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:31:21,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384407584] [2021-10-11 02:31:21,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:31:21,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:31:21,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:31:21,129 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2021-10-11 02:31:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:21,239 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2021-10-11 02:31:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:31:21,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-10-11 02:31:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:21,241 INFO L225 Difference]: With dead ends: 73 [2021-10-11 02:31:21,241 INFO L226 Difference]: Without dead ends: 73 [2021-10-11 02:31:21,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:31:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-11 02:31:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2021-10-11 02:31:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-10-11 02:31:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2021-10-11 02:31:21,245 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 14 [2021-10-11 02:31:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:21,246 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2021-10-11 02:31:21,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:31:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2021-10-11 02:31:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 02:31:21,247 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:21,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:21,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:21,462 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash 595785087, now seen corresponding path program 1 times [2021-10-11 02:31:21,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:21,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615368947] [2021-10-11 02:31:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:21,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615368947] [2021-10-11 02:31:21,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768282524] [2021-10-11 02:31:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:21,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:31:21,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:21,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:21,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640756812] [2021-10-11 02:31:21,600 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-11 02:31:21,600 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:21,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:21,600 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:21,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:21,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:21,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:21,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:22,370 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:22,776 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:23,033 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:23,158 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-10-11 02:31:23,300 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:23,448 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:23,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:23,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-10-11 02:31:23,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343648742] [2021-10-11 02:31:23,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:31:23,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:31:23,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:31:23,450 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand 9 states. [2021-10-11 02:31:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:23,543 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-10-11 02:31:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:31:23,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-10-11 02:31:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:23,544 INFO L225 Difference]: With dead ends: 103 [2021-10-11 02:31:23,544 INFO L226 Difference]: Without dead ends: 103 [2021-10-11 02:31:23,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:31:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-11 02:31:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-10-11 02:31:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-10-11 02:31:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2021-10-11 02:31:23,550 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 15 [2021-10-11 02:31:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:23,551 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2021-10-11 02:31:23,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:31:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2021-10-11 02:31:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:31:23,551 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:23,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2021-10-11 02:31:23,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-10-11 02:31:23,758 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash -830929546, now seen corresponding path program 4 times [2021-10-11 02:31:23,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:23,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037716750] [2021-10-11 02:31:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:23,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037716750] [2021-10-11 02:31:23,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356953141] [2021-10-11 02:31:23,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:31:23,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:31:23,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541935921] [2021-10-11 02:31:23,912 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:23,912 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:23,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:23,913 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:23,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:23,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:24,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:24,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:24,433 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:24,552 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:31:24,940 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:25,187 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:25,425 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:25,435 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:25,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:25,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-10-11 02:31:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655003416] [2021-10-11 02:31:25,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:31:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:31:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:31:25,436 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand 6 states. [2021-10-11 02:31:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:25,494 INFO L93 Difference]: Finished difference Result 194 states and 267 transitions. [2021-10-11 02:31:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:31:25,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-10-11 02:31:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:25,495 INFO L225 Difference]: With dead ends: 194 [2021-10-11 02:31:25,496 INFO L226 Difference]: Without dead ends: 194 [2021-10-11 02:31:25,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:31:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-11 02:31:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 100. [2021-10-11 02:31:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-10-11 02:31:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2021-10-11 02:31:25,503 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 16 [2021-10-11 02:31:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:25,503 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2021-10-11 02:31:25,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:31:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2021-10-11 02:31:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:31:25,504 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:25,505 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2021-10-11 02:31:25,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:25,718 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:25,719 INFO L82 PathProgramCache]: Analyzing trace with hash 924819805, now seen corresponding path program 2 times [2021-10-11 02:31:25,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:25,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722582899] [2021-10-11 02:31:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:31:25,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722582899] [2021-10-11 02:31:25,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98275895] [2021-10-11 02:31:25,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:25,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:31:25,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:31:25,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 02:31:25,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-11 02:31:25,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-11 02:31:26,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [919209950] [2021-10-11 02:31:26,061 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:26,061 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:26,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:26,062 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:26,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:26,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:26,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:26,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:26,684 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:26,852 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-10-11 02:31:27,231 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:27,496 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:27,625 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-10-11 02:31:27,757 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:27,758 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:27,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:27,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2021-10-11 02:31:27,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938246238] [2021-10-11 02:31:27,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:31:27,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:31:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:31:27,759 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand 12 states. [2021-10-11 02:31:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,846 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2021-10-11 02:31:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:31:27,846 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2021-10-11 02:31:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,847 INFO L225 Difference]: With dead ends: 98 [2021-10-11 02:31:27,847 INFO L226 Difference]: Without dead ends: 98 [2021-10-11 02:31:27,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:31:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-11 02:31:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2021-10-11 02:31:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-10-11 02:31:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2021-10-11 02:31:27,852 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 20 [2021-10-11 02:31:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,852 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2021-10-11 02:31:27,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:31:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2021-10-11 02:31:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 02:31:27,853 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,853 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1] [2021-10-11 02:31:28,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-10-11 02:31:28,067 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1432583701, now seen corresponding path program 2 times [2021-10-11 02:31:28,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:28,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293571248] [2021-10-11 02:31:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-11 02:31:28,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293571248] [2021-10-11 02:31:28,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989804919] [2021-10-11 02:31:28,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:28,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:31:28,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:31:28,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:31:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-11 02:31:28,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-11 02:31:28,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43456835] [2021-10-11 02:31:28,518 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:28,518 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:28,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:28,519 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:28,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:28,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:28,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:28,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:29,087 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:29,255 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-10-11 02:31:29,648 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-10-11 02:31:29,918 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:31:30,173 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-10-11 02:31:30,174 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:30,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:30,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 14 [2021-10-11 02:31:30,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312463721] [2021-10-11 02:31:30,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-10-11 02:31:30,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:30,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-11 02:31:30,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:31:30,176 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 14 states. [2021-10-11 02:31:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:30,668 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-10-11 02:31:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 02:31:30,668 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2021-10-11 02:31:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:30,669 INFO L225 Difference]: With dead ends: 74 [2021-10-11 02:31:30,669 INFO L226 Difference]: Without dead ends: 74 [2021-10-11 02:31:30,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-10-11 02:31:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-11 02:31:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-10-11 02:31:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-10-11 02:31:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-10-11 02:31:30,674 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 28 [2021-10-11 02:31:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:30,675 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-10-11 02:31:30,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-10-11 02:31:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-10-11 02:31:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-11 02:31:30,680 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:30,680 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:30,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-10-11 02:31:30,880 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:31:30,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:30,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1496073855, now seen corresponding path program 2 times [2021-10-11 02:31:30,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:30,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747938197] [2021-10-11 02:31:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 149 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-11 02:31:31,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747938197] [2021-10-11 02:31:31,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041581820] [2021-10-11 02:31:31,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:31,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:31:31,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:31:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:31:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-10-11 02:31:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-10-11 02:31:31,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:31:31,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [9] total 13 [2021-10-11 02:31:31,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470679649] [2021-10-11 02:31:31,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:31:31,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:31:31,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:31:31,277 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 6 states. [2021-10-11 02:31:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:31,306 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2021-10-11 02:31:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:31,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2021-10-11 02:31:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:31,307 INFO L225 Difference]: With dead ends: 67 [2021-10-11 02:31:31,307 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:31:31,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:31:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:31:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:31:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:31:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:31:31,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-10-11 02:31:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:31,309 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:31:31,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:31:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:31:31,309 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:31:31,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-10-11 02:31:31,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:31 BoogieIcfgContainer [2021-10-11 02:31:31,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:31,537 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:31,537 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:31,537 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:31,538 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:00" (3/4) ... [2021-10-11 02:31:31,540 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:31:31,551 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-11 02:31:31,552 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:31:31,552 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:31:31,597 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8826d72-b907-44fd-9d42-58a1f7a2ee57/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:31,597 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:31,600 INFO L168 Benchmark]: Toolchain (without parser) took 31611.37 ms. Allocated memory was 88.1 MB in the beginning and 295.7 MB in the end (delta: 207.6 MB). Free memory was 54.8 MB in the beginning and 173.8 MB in the end (delta: -118.9 MB). Peak memory consumption was 89.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:31,601 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 26.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:31,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.34 ms. Allocated memory is still 88.1 MB. Free memory was 54.6 MB in the beginning and 65.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:31,601 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.97 ms. Allocated memory is still 88.1 MB. Free memory was 65.8 MB in the beginning and 64.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:31,602 INFO L168 Benchmark]: Boogie Preprocessor took 27.34 ms. Allocated memory is still 88.1 MB. Free memory was 64.4 MB in the beginning and 63.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:31,602 INFO L168 Benchmark]: RCFGBuilder took 610.15 ms. Allocated memory is still 88.1 MB. Free memory was 63.0 MB in the beginning and 41.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:31,602 INFO L168 Benchmark]: TraceAbstraction took 30592.69 ms. Allocated memory was 88.1 MB in the beginning and 295.7 MB in the end (delta: 207.6 MB). Free memory was 40.6 MB in the beginning and 175.9 MB in the end (delta: -135.3 MB). Peak memory consumption was 73.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:31,603 INFO L168 Benchmark]: Witness Printer took 60.18 ms. Allocated memory is still 295.7 MB. Free memory was 175.9 MB in the beginning and 173.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:31,609 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 26.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 249.34 ms. Allocated memory is still 88.1 MB. Free memory was 54.6 MB in the beginning and 65.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.97 ms. Allocated memory is still 88.1 MB. Free memory was 65.8 MB in the beginning and 64.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.34 ms. Allocated memory is still 88.1 MB. Free memory was 64.4 MB in the beginning and 63.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 610.15 ms. Allocated memory is still 88.1 MB. Free memory was 63.0 MB in the beginning and 41.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 30592.69 ms. Allocated memory was 88.1 MB in the beginning and 295.7 MB in the end (delta: 207.6 MB). Free memory was 40.6 MB in the beginning and 175.9 MB in the end (delta: -135.3 MB). Peak memory consumption was 73.8 MB. Max. memory is 16.1 GB. * Witness Printer took 60.18 ms. Allocated memory is still 295.7 MB. Free memory was 175.9 MB in the beginning and 173.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.5s, OverallIterations: 17, TraceHistogramMax: 9, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 577 SDslu, 287 SDs, 0 SdLazy, 861 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 655 GetRequests, 459 SyntacticMatches, 6 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 286 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 451 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 621 ConstructedInterpolants, 11 QuantifiedInterpolants, 147489 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1142 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 941/1181 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 1931, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 18, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 44, TOOLS_POST_TIME[ms]: 991, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 44, TOOLS_QUANTIFIERELIM_TIME[ms]: 968, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 184, FLUID_QUERY_TIME[ms]: 6, FLUID_QUERIES: 77, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME[ms]: 444, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 367, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 25, DOMAIN_ISBOTTOM_APPLICATIONS: 18, DOMAIN_ISBOTTOM_TIME[ms]: 43, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1170, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1169, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 139, DAG_COMPRESSION_RETAINED_NODES: 54, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...