./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8 --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 cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:37:21,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:37:21,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:37:21,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:37:21,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:37:21,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:37:21,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:37:21,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:37:21,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:37:21,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:37:21,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:37:21,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:37:21,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:37:21,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:37:21,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:37:21,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:37:21,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:37:21,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:37:21,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:37:21,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:37:21,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:37:21,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:37:21,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:37:21,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:37:21,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:37:21,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:37:21,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:37:21,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:37:21,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:37:21,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:37:21,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:37:21,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:37:21,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:37:21,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:37:21,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:37:21,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:37:21,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:37:21,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:37:21,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:37:21,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:37:21,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:37:21,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:37:21,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:37:21,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:37:21,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:37:21,630 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:37:21,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:37:21,631 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:37:21,631 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:37:21,632 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:37:21,632 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:37:21,632 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:37:21,633 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:37:21,633 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:37:21,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:37:21,634 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:37:21,634 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:37:21,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:37:21,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:37:21,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:37:21,637 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:37:21,637 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:37:21,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:37:21,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:37:21,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:37:21,638 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:37:21,639 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:37:21,639 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:37:21,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:37:21,640 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:37:21,640 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:37:21,641 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:37:21,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:37:21,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:37:21,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:21,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:37:21,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:37:21,643 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:37:21,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:37:21,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:37:21,644 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:37:21,644 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_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b [2021-11-07 01:37:21,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:37:21,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:37:21,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:37:21,906 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:37:21,906 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:37:21,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-11-07 01:37:21,988 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/data/66d38f7a9/e0cc7c1e50d7486c9938c10a896a860f/FLAG9d483b52f [2021-11-07 01:37:22,494 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:37:22,495 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-11-07 01:37:22,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/data/66d38f7a9/e0cc7c1e50d7486c9938c10a896a860f/FLAG9d483b52f [2021-11-07 01:37:22,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/data/66d38f7a9/e0cc7c1e50d7486c9938c10a896a860f [2021-11-07 01:37:22,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:37:22,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:37:22,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:22,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:37:22,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:37:22,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775d008a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22, skipping insertion in model container [2021-11-07 01:37:22,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:37:22,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:23,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:23,092 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:37:23,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:23,118 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:37:23,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23 WrapperNode [2021-11-07 01:37:23,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:23,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:23,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:37:23,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:37:23,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:23,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:37:23,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:37:23,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:37:23,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:37:23,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:37:23,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:37:23,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:37:23,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (1/1) ... [2021-11-07 01:37:23,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:23,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:37:23,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:37:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 01:37:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:37:23,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:37:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 01:37:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:37:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:37:23,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:37:23,479 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-07 01:37:23,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:23 BoogieIcfgContainer [2021-11-07 01:37:23,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:37:23,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:37:23,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:37:23,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:37:23,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:37:22" (1/3) ... [2021-11-07 01:37:23,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b86d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:23, skipping insertion in model container [2021-11-07 01:37:23,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:23" (2/3) ... [2021-11-07 01:37:23,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b86d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:23, skipping insertion in model container [2021-11-07 01:37:23,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:23" (3/3) ... [2021-11-07 01:37:23,490 INFO L111 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2021-11-07 01:37:23,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:37:23,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-07 01:37:23,542 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:37:23,550 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:37:23,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-07 01:37:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:37:23,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:23,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:37:23,571 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-07 01:37:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:23,577 INFO L85 PathProgramCache]: Analyzing trace with hash 70475, now seen corresponding path program 1 times [2021-11-07 01:37:23,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:23,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132824293] [2021-11-07 01:37:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:23,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:23,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:23,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132824293] [2021-11-07 01:37:23,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132824293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:23,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:23,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:37:23,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551853916] [2021-11-07 01:37:23,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:23,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:23,793 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:23,835 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-07 01:37:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:23,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:37:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:23,849 INFO L225 Difference]: With dead ends: 17 [2021-11-07 01:37:23,851 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 01:37:23,854 INFO L786 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 [2021-11-07 01:37:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 01:37:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-07 01:37:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 01:37:23,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2021-11-07 01:37:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:23,887 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 01:37:23,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 01:37:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:37:23,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:23,889 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:37:23,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:37:23,891 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-07 01:37:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash 70476, now seen corresponding path program 1 times [2021-11-07 01:37:23,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:23,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775626960] [2021-11-07 01:37:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:23,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:24,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:24,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775626960] [2021-11-07 01:37:24,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775626960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:24,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:24,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:37:24,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311035999] [2021-11-07 01:37:24,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:24,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:24,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:24,021 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:24,059 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-07 01:37:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:37:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:24,061 INFO L225 Difference]: With dead ends: 17 [2021-11-07 01:37:24,061 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 01:37:24,063 INFO L786 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 [2021-11-07 01:37:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 01:37:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 01:37:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-07 01:37:24,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2021-11-07 01:37:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:24,070 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-07 01:37:24,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-07 01:37:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:37:24,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:24,072 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-07 01:37:24,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:37:24,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-07 01:37:24,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:24,075 INFO L85 PathProgramCache]: Analyzing trace with hash 67754667, now seen corresponding path program 1 times [2021-11-07 01:37:24,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:24,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12363670] [2021-11-07 01:37:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:24,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:24,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:24,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12363670] [2021-11-07 01:37:24,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12363670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:24,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:24,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:37:24,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456432155] [2021-11-07 01:37:24,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:24,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:24,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:24,245 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:24,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:24,291 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-07 01:37:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:24,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 01:37:24,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:24,292 INFO L225 Difference]: With dead ends: 14 [2021-11-07 01:37:24,292 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 01:37:24,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 01:37:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-07 01:37:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-07 01:37:24,295 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-11-07 01:37:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:24,296 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-07 01:37:24,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-07 01:37:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:37:24,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:24,297 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:24,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:37:24,298 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-07 01:37:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:24,298 INFO L85 PathProgramCache]: Analyzing trace with hash -123703437, now seen corresponding path program 1 times [2021-11-07 01:37:24,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:24,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512616648] [2021-11-07 01:37:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:24,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:24,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:24,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512616648] [2021-11-07 01:37:24,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512616648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:37:24,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813564863] [2021-11-07 01:37:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:24,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:37:24,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:24,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:37:24,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:37:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:37:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:24,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:24,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813564863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:24,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1557712646] [2021-11-07 01:37:24,594 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-07 01:37:24,595 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:37:24,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:37:24,606 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:37:24,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:37:24,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,640 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:24,650 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-11-07 01:37:24,651 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:24,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-11-07 01:37:24,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:37:24,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:37:24,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,701 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-11-07 01:37:24,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-11-07 01:37:24,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:24,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:24,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:37:24,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,745 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-11-07 01:37:24,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-11-07 01:37:24,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:24,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:24,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,773 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-07 01:37:24,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:37:24,776 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:52, output treesize:50 [2021-11-07 01:37:24,793 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.9 percent of original size [2021-11-07 01:37:24,807 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:24,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,812 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:24,813 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-07 01:37:24,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:37:24,819 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:24,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:24,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-07 01:37:24,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-07 01:37:24,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:24,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,851 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:24,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:24,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:24,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:24,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-07 01:37:24,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:37:24,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:91 [2021-11-07 01:37:24,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:24,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:24,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:24,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,008 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,022 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,036 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-07 01:37:25,043 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,046 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-07 01:37:25,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-11-07 01:37:25,054 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-07 01:37:25,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-07 01:37:25,074 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,077 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,078 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:25,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 01:37:25,083 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,090 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,090 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,091 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,092 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,093 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-07 01:37:25,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-07 01:37:25,094 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,096 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:25,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 01:37:25,099 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:37:25,103 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,104 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-07 01:37:25,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:37:25,106 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:25,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-11-07 01:37:25,112 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,115 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-07 01:37:25,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 227 [2021-11-07 01:37:25,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:25,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-07 01:37:25,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,147 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 01:37:25,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,149 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-07 01:37:25,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-07 01:37:25,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:25,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:25,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:25,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,210 INFO L180 QuantifierPusher]: treesize reduction 72, result has 75.2 percent of original size [2021-11-07 01:37:25,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 225 [2021-11-07 01:37:25,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:37:25,217 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:297, output treesize:225 [2021-11-07 01:37:25,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,260 INFO L180 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-11-07 01:37:25,266 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,266 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,267 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-07 01:37:25,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:37:25,269 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:25,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-11-07 01:37:25,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-07 01:37:25,280 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:25,281 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:25,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:25,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,287 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,289 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-07 01:37:25,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:37:25,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:70 [2021-11-07 01:37:25,298 INFO L180 QuantifierPusher]: treesize reduction 27, result has 66.7 percent of original size [2021-11-07 01:37:25,300 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-07 01:37:25,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,305 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,307 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:25,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:37:25,310 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,310 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,311 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,312 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:37:25,313 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-07 01:37:25,313 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,314 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:37:25,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 01:37:25,334 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:37:25,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-07 01:37:25,335 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:37:25,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,338 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:37:25,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:25,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:25,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,345 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,346 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,348 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:37:25,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 01:37:25,351 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:25,351 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:25,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-07 01:37:25,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-07 01:37:25,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-11-07 01:37:25,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:59 [2021-11-07 01:37:25,358 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:37:25,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:37:25,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:37:25,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-07 01:37:25,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213760183] [2021-11-07 01:37:25,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:25,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:25,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:37:25,691 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:25,719 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-07 01:37:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:37:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 01:37:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:25,720 INFO L225 Difference]: With dead ends: 19 [2021-11-07 01:37:25,720 INFO L226 Difference]: Without dead ends: 19 [2021-11-07 01:37:25,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:37:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-07 01:37:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-07 01:37:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-07 01:37:25,724 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 8 [2021-11-07 01:37:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:25,725 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-07 01:37:25,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-07 01:37:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:37:25,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:25,726 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:25,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:25,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:37:25,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-07 01:37:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1398178122, now seen corresponding path program 2 times [2021-11-07 01:37:25,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:25,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668385190] [2021-11-07 01:37:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:25,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:26,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:26,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668385190] [2021-11-07 01:37:26,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668385190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:37:26,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26629722] [2021-11-07 01:37:26,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:37:26,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:37:26,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:26,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:37:26,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:37:26,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-07 01:37:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:37:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:37:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:26,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:37:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:37:26,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:37:26,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26629722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:26,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:37:26,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6] total 10 [2021-11-07 01:37:26,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450311813] [2021-11-07 01:37:26,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:26,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:26,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:37:26,376 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:26,412 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-11-07 01:37:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:37:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:26,415 INFO L225 Difference]: With dead ends: 21 [2021-11-07 01:37:26,416 INFO L226 Difference]: Without dead ends: 19 [2021-11-07 01:37:26,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:37:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-07 01:37:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-07 01:37:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-07 01:37:26,422 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2021-11-07 01:37:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:26,423 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-07 01:37:26,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:26,423 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-07 01:37:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:37:26,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:26,424 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:26,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:26,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:37:26,650 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-07 01:37:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1398186067, now seen corresponding path program 1 times [2021-11-07 01:37:26,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:26,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742787186] [2021-11-07 01:37:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:26,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:26,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:26,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742787186] [2021-11-07 01:37:26,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742787186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:37:26,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459415826] [2021-11-07 01:37:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:26,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:37:26,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:26,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:37:26,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:37:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:26,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:37:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:26,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:26,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459415826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:26,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854726402] [2021-11-07 01:37:26,950 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-07 01:37:26,951 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:37:26,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:37:26,951 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:37:26,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:37:26,957 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,958 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:26,958 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-11-07 01:37:26,959 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:26,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-11-07 01:37:26,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:37:26,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:37:26,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-11-07 01:37:26,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-11-07 01:37:26,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:26,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:26,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:37:26,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-11-07 01:37:26,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-11-07 01:37:26,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:26,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:26,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,987 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-07 01:37:26,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:37:26,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:52, output treesize:50 [2021-11-07 01:37:26,992 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.9 percent of original size [2021-11-07 01:37:26,996 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:26,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,997 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:26,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:26,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:37:26,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:37:26,999 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:37:27,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-07 01:37:27,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:37:27,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-07 01:37:27,013 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-07 01:37:27,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:27,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:37:27,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:37:27,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:84, output treesize:81 [2021-11-07 01:37:27,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,075 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,080 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,083 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,083 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-07 01:37:27,085 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:37:27,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-11-07 01:37:27,089 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,093 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-07 01:37:27,095 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-11-07 01:37:27,095 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,097 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:27,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 01:37:27,102 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,108 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,110 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:37:27,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:37:27,112 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,116 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,117 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:27,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-07 01:37:27,119 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:37:27,123 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,124 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,125 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-07 01:37:27,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:37:27,129 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:27,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:37:27,135 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 156 [2021-11-07 01:37:27,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214 [2021-11-07 01:37:27,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-07 01:37:27,169 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,169 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:27,169 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:27,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:27,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-11-07 01:37:27,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-07 01:37:27,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-07 01:37:27,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:27,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,219 INFO L180 QuantifierPusher]: treesize reduction 58, result has 79.1 percent of original size [2021-11-07 01:37:27,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 226 [2021-11-07 01:37:27,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-11-07 01:37:27,225 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:284, output treesize:226 [2021-11-07 01:37:27,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,272 INFO L180 QuantifierPusher]: treesize reduction 18, result has 80.9 percent of original size [2021-11-07 01:37:27,278 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,278 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,279 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-07 01:37:27,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-07 01:37:27,281 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:37:27,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 01:37:27,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 72 [2021-11-07 01:37:27,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-07 01:37:27,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:27,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-11-07 01:37:27,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:37:27,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:37:27,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:37:27,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-07 01:37:27,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:37:27,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:70 [2021-11-07 01:37:27,318 INFO L180 QuantifierPusher]: treesize reduction 27, result has 66.3 percent of original size [2021-11-07 01:37:27,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:37:27,324 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:37:27,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:37:27,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:37:27,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-07 01:37:27,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057651094] [2021-11-07 01:37:27,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:37:27,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:27,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:37:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:37:27,647 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:27,689 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-11-07 01:37:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:37:27,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:37:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:27,691 INFO L225 Difference]: With dead ends: 31 [2021-11-07 01:37:27,691 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 01:37:27,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:37:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 01:37:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-07 01:37:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-07 01:37:27,695 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 14 [2021-11-07 01:37:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:27,695 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-07 01:37:27,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-07 01:37:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:37:27,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:27,697 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:27,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:27,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:37:27,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-07 01:37:27,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:27,898 INFO L85 PathProgramCache]: Analyzing trace with hash -740166797, now seen corresponding path program 2 times [2021-11-07 01:37:27,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:27,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234977917] [2021-11-07 01:37:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:27,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:37:27,964 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:37:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:37:28,033 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:37:28,034 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:37:28,035 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:37:28,036 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-11-07 01:37:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-11-07 01:37:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-11-07 01:37:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-11-07 01:37:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:37:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 01:37:28,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK [2021-11-07 01:37:28,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-07 01:37:28,041 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2021-11-07 01:37:28,045 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:37:28,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:37:28 BoogieIcfgContainer [2021-11-07 01:37:28,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:37:28,071 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:37:28,071 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:37:28,071 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:37:28,072 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:23" (3/4) ... [2021-11-07 01:37:28,074 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 01:37:28,115 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:37:28,116 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:37:28,117 INFO L168 Benchmark]: Toolchain (without parser) took 5249.23 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 98.8 MB in the beginning and 94.7 MB in the end (delta: 4.1 MB). Peak memory consumption was 32.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:28,117 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:37:28,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.46 ms. Allocated memory is still 132.1 MB. Free memory was 98.8 MB in the beginning and 109.1 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:28,118 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.62 ms. Allocated memory is still 132.1 MB. Free memory was 109.1 MB in the beginning and 107.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:37:28,118 INFO L168 Benchmark]: Boogie Preprocessor took 21.32 ms. Allocated memory is still 132.1 MB. Free memory was 107.5 MB in the beginning and 106.8 MB in the end (delta: 701.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:37:28,118 INFO L168 Benchmark]: RCFGBuilder took 309.59 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 96.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:28,119 INFO L168 Benchmark]: TraceAbstraction took 4587.30 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 95.6 MB in the beginning and 96.7 MB in the end (delta: -1.1 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:28,119 INFO L168 Benchmark]: Witness Printer took 44.66 ms. Allocated memory is still 159.4 MB. Free memory was 96.7 MB in the beginning and 94.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:28,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.46 ms. Allocated memory is still 132.1 MB. Free memory was 98.8 MB in the beginning and 109.1 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.62 ms. Allocated memory is still 132.1 MB. Free memory was 109.1 MB in the beginning and 107.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.32 ms. Allocated memory is still 132.1 MB. Free memory was 107.5 MB in the beginning and 106.8 MB in the end (delta: 701.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 309.59 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 96.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4587.30 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 95.6 MB in the beginning and 96.7 MB in the end (delta: -1.1 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. * Witness Printer took 44.66 ms. Allocated memory is still 159.4 MB. Free memory was 96.7 MB in the beginning and 94.7 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND FALSE !(i < 10) [L13] EXPR p[2] [L13] COND TRUE p[2] == 'a' [L14] free(p) [L14] free(p) - UnprovableResult [Line: 10]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 10]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 4.5s, OverallIterations: 7, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 52 SDslu, 88 SDs, 0 SdLazy, 107 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 109 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 107 ConstructedInterpolants, 1 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 152 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 34/101 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-07 01:37:28,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5dab8b-137e-4080-8b0f-65e0de45b2c3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)