./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE --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 63302b5441ba85cd38f4ed3669bf40852137e8be39297cc19159731ba051a536 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:46:25,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:46:25,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:46:25,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:46:25,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:46:25,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:46:25,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:46:25,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:46:25,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:46:25,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:46:25,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:46:25,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:46:25,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:46:25,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:46:25,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:46:25,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:46:25,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:46:25,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:46:25,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:46:25,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:46:25,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:46:25,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:46:25,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:46:25,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:46:25,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:46:25,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:46:25,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:46:25,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:46:25,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:46:25,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:46:25,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:46:25,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:46:25,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:46:25,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:46:25,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:46:25,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:46:25,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:46:25,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:46:25,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:46:25,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:46:25,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:46:25,620 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-24 09:46:25,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:46:25,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:46:25,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:46:25,673 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:46:25,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:46:25,681 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:46:25,681 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 09:46:25,681 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:46:25,682 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:46:25,682 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 09:46:25,683 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 09:46:25,684 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:46:25,684 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 09:46:25,684 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 09:46:25,684 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 09:46:25,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 09:46:25,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 09:46:25,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:46:25,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:46:25,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 09:46:25,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:46:25,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:46:25,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:46:25,687 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 09:46:25,688 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 09:46:25,688 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 09:46:25,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:46:25,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:46:25,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:46:25,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:46:25,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:46:25,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:46:25,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:46:25,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:46:25,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:46:25,692 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 09:46:25,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 09:46:25,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:46:25,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:46:25,693 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_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63302b5441ba85cd38f4ed3669bf40852137e8be39297cc19159731ba051a536 [2021-10-24 09:46:26,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:46:26,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:46:26,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:46:26,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:46:26,105 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:46:26,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2021-10-24 09:46:26,199 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/data/9bbd70592/9e5795f4dac34554bbde3d04e775d588/FLAGa337965bd [2021-10-24 09:46:26,739 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:46:26,740 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2021-10-24 09:46:26,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/data/9bbd70592/9e5795f4dac34554bbde3d04e775d588/FLAGa337965bd [2021-10-24 09:46:27,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/data/9bbd70592/9e5795f4dac34554bbde3d04e775d588 [2021-10-24 09:46:27,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:46:27,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:46:27,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:46:27,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:46:27,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:46:27,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ca8097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27, skipping insertion in model container [2021-10-24 09:46:27,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:46:27,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:46:27,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:46:27,560 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:46:27,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:46:27,672 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:46:27,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27 WrapperNode [2021-10-24 09:46:27,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:46:27,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:46:27,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:46:27,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:46:27,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:46:27,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:46:27,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:46:27,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:46:27,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:46:27,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:46:27,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:46:27,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:46:27,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (1/1) ... [2021-10-24 09:46:27,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:46:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:46:27,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:46:27,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:46:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 09:46:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 09:46:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:46:27,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:46:28,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:46:28,313 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-24 09:46:28,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:46:28 BoogieIcfgContainer [2021-10-24 09:46:28,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:46:28,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:46:28,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:46:28,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:46:28,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:46:27" (1/3) ... [2021-10-24 09:46:28,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca8287d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:46:28, skipping insertion in model container [2021-10-24 09:46:28,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:46:27" (2/3) ... [2021-10-24 09:46:28,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca8287d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:46:28, skipping insertion in model container [2021-10-24 09:46:28,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:46:28" (3/3) ... [2021-10-24 09:46:28,348 INFO L111 eAbstractionObserver]: Analyzing ICFG cmp-freed-ptr.i [2021-10-24 09:46:28,354 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:46:28,356 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-24 09:46:28,456 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:46:28,465 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 [2021-10-24 09:46:28,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-24 09:46:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 22 states have internal predecessors, (23), 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) [2021-10-24 09:46:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-24 09:46:28,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:46:28,510 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-24 09:46:28,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-24 09:46:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:46:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1925, now seen corresponding path program 1 times [2021-10-24 09:46:28,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:46:28,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995423847] [2021-10-24 09:46:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:46:28,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:46:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:46:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:46:28,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:46:28,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995423847] [2021-10-24 09:46:28,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995423847] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:46:28,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:46:28,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-24 09:46:28,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753207517] [2021-10-24 09:46:28,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:46:28,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:46:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:46:28,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:28,714 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 22 states have internal predecessors, (23), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2021-10-24 09:46:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:46:28,762 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-24 09:46:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:46:28,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-10-24 09:46:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:46:28,774 INFO L225 Difference]: With dead ends: 22 [2021-10-24 09:46:28,775 INFO L226 Difference]: Without dead ends: 21 [2021-10-24 09:46:28,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-24 09:46:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-24 09:46:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.75) internal successors, (21), 20 states have internal predecessors, (21), 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) [2021-10-24 09:46:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-10-24 09:46:28,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 2 [2021-10-24 09:46:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:46:28,843 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-10-24 09:46:28,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2021-10-24 09:46:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-10-24 09:46:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-24 09:46:28,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:46:28,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-24 09:46:28,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 09:46:28,845 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-24 09:46:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:46:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash 59711, now seen corresponding path program 1 times [2021-10-24 09:46:28,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:46:28,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482924178] [2021-10-24 09:46:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:46:28,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:46:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:46:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:46:28,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:46:28,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482924178] [2021-10-24 09:46:28,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482924178] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:46:28,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:46:28,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-24 09:46:28,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499423069] [2021-10-24 09:46:28,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:46:28,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:46:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:46:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:28,888 INFO L87 Difference]: Start difference. First operand 21 states and 21 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) [2021-10-24 09:46:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:46:28,923 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-10-24 09:46:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:46:28,924 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 [2021-10-24 09:46:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:46:28,925 INFO L225 Difference]: With dead ends: 20 [2021-10-24 09:46:28,925 INFO L226 Difference]: Without dead ends: 20 [2021-10-24 09:46:28,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-24 09:46:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-24 09:46:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 19 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) [2021-10-24 09:46:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-24 09:46:28,930 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 3 [2021-10-24 09:46:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:46:28,930 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-24 09:46:28,930 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) [2021-10-24 09:46:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-24 09:46:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 09:46:28,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:46:28,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 09:46:28,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 09:46:28,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-24 09:46:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:46:28,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1851079, now seen corresponding path program 1 times [2021-10-24 09:46:28,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:46:28,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541170450] [2021-10-24 09:46:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:46:28,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:46:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:46:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:46:29,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:46:29,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541170450] [2021-10-24 09:46:29,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541170450] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:46:29,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:46:29,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-24 09:46:29,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647902892] [2021-10-24 09:46:29,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:46:29,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:46:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:46:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:29,019 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 09:46:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:46:29,050 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-10-24 09:46:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:46:29,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-24 09:46:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:46:29,052 INFO L225 Difference]: With dead ends: 19 [2021-10-24 09:46:29,052 INFO L226 Difference]: Without dead ends: 19 [2021-10-24 09:46:29,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-24 09:46:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-24 09:46:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.5833333333333333) 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) [2021-10-24 09:46:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-24 09:46:29,057 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 4 [2021-10-24 09:46:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:46:29,057 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-24 09:46:29,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 09:46:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-24 09:46:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 09:46:29,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:46:29,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 09:46:29,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 09:46:29,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-24 09:46:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:46:29,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1778888490, now seen corresponding path program 1 times [2021-10-24 09:46:29,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:46:29,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377389859] [2021-10-24 09:46:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:46:29,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:46:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:46:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:46:29,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:46:29,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377389859] [2021-10-24 09:46:29,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377389859] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:46:29,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:46:29,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:46:29,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408931267] [2021-10-24 09:46:29,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:46:29,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:46:29,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:46:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:29,140 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-24 09:46:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:46:29,162 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-24 09:46:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:46:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-10-24 09:46:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:46:29,164 INFO L225 Difference]: With dead ends: 17 [2021-10-24 09:46:29,165 INFO L226 Difference]: Without dead ends: 17 [2021-10-24 09:46:29,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-24 09:46:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-24 09:46:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-10-24 09:46:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-24 09:46:29,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 6 [2021-10-24 09:46:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:46:29,169 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-24 09:46:29,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-24 09:46:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-24 09:46:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 09:46:29,170 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:46:29,170 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:46:29,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 09:46:29,171 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-24 09:46:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:46:29,172 INFO L82 PathProgramCache]: Analyzing trace with hash -689031604, now seen corresponding path program 1 times [2021-10-24 09:46:29,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:46:29,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18112389] [2021-10-24 09:46:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:46:29,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:46:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:46:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:46:29,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:46:29,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18112389] [2021-10-24 09:46:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18112389] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:46:29,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:46:29,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:46:29,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675088233] [2021-10-24 09:46:29,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:46:29,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:46:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:46:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:29,238 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:46:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:46:29,266 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-24 09:46:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:46:29,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-24 09:46:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:46:29,270 INFO L225 Difference]: With dead ends: 15 [2021-10-24 09:46:29,270 INFO L226 Difference]: Without dead ends: 15 [2021-10-24 09:46:29,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-24 09:46:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-24 09:46:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:46:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-24 09:46:29,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2021-10-24 09:46:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:46:29,277 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-24 09:46:29,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:46:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-24 09:46:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 09:46:29,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:46:29,278 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:46:29,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 09:46:29,279 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-24 09:46:29,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:46:29,281 INFO L82 PathProgramCache]: Analyzing trace with hash 114856812, now seen corresponding path program 1 times [2021-10-24 09:46:29,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:46:29,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908787195] [2021-10-24 09:46:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:46:29,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:46:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:46:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:46:29,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:46:29,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908787195] [2021-10-24 09:46:29,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908787195] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:46:29,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:46:29,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:46:29,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345791919] [2021-10-24 09:46:29,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:46:29,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:46:29,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:46:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:29,339 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:46:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:46:29,358 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-24 09:46:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:46:29,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 09:46:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:46:29,359 INFO L225 Difference]: With dead ends: 17 [2021-10-24 09:46:29,360 INFO L226 Difference]: Without dead ends: 17 [2021-10-24 09:46:29,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:46:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-24 09:46:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-24 09:46:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-10-24 09:46:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-24 09:46:29,364 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2021-10-24 09:46:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:46:29,364 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-24 09:46:29,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:46:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-24 09:46:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 09:46:29,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:46:29,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:46:29,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 09:46:29,366 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-24 09:46:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:46:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash -734406065, now seen corresponding path program 1 times [2021-10-24 09:46:29,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:46:29,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153609004] [2021-10-24 09:46:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:46:29,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:46:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:46:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:46:29,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:46:29,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153609004] [2021-10-24 09:46:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153609004] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:46:29,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:46:29,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 09:46:29,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821415087] [2021-10-24 09:46:29,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:46:29,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:46:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:46:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:46:29,493 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:46:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:46:29,551 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-24 09:46:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:46:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 09:46:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:46:29,553 INFO L225 Difference]: With dead ends: 16 [2021-10-24 09:46:29,553 INFO L226 Difference]: Without dead ends: 12 [2021-10-24 09:46:29,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:46:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-24 09:46:29,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-24 09:46:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:46:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2021-10-24 09:46:29,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 9 [2021-10-24 09:46:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:46:29,556 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2021-10-24 09:46:29,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:46:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2021-10-24 09:46:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 09:46:29,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:46:29,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:46:29,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 09:46:29,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-24 09:46:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:46:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash -165933941, now seen corresponding path program 1 times [2021-10-24 09:46:29,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:46:29,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811823687] [2021-10-24 09:46:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:46:29,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:46:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:46:29,597 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 09:46:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:46:29,647 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 09:46:29,648 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 09:46:29,649 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,651 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 09:46:29,659 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 09:46:29,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-24 09:46:29,667 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:46:29,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:46:29 BoogieIcfgContainer [2021-10-24 09:46:29,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:46:29,695 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:46:29,695 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:46:29,695 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:46:29,696 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:46:28" (3/4) ... [2021-10-24 09:46:29,698 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 09:46:29,742 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 09:46:29,743 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:46:29,745 INFO L168 Benchmark]: Toolchain (without parser) took 2691.39 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 54.7 MB in the beginning and 64.1 MB in the end (delta: -9.4 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. [2021-10-24 09:46:29,747 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 72.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:46:29,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.89 ms. Allocated memory is still 96.5 MB. Free memory was 54.5 MB in the beginning and 65.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-10-24 09:46:29,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.79 ms. Allocated memory is still 96.5 MB. Free memory was 65.1 MB in the beginning and 63.3 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:46:29,752 INFO L168 Benchmark]: Boogie Preprocessor took 29.29 ms. Allocated memory is still 96.5 MB. Free memory was 63.3 MB in the beginning and 62.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:46:29,753 INFO L168 Benchmark]: RCFGBuilder took 543.43 ms. Allocated memory is still 96.5 MB. Free memory was 62.3 MB in the beginning and 52.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:46:29,755 INFO L168 Benchmark]: TraceAbstraction took 1372.90 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 51.8 MB in the beginning and 66.1 MB in the end (delta: -14.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-10-24 09:46:29,755 INFO L168 Benchmark]: Witness Printer took 47.69 ms. Allocated memory is still 123.7 MB. Free memory was 66.1 MB in the beginning and 64.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:46:29,758 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 72.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 614.89 ms. Allocated memory is still 96.5 MB. Free memory was 54.5 MB in the beginning and 65.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.79 ms. Allocated memory is still 96.5 MB. Free memory was 65.1 MB in the beginning and 63.3 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.29 ms. Allocated memory is still 96.5 MB. Free memory was 63.3 MB in the beginning and 62.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 543.43 ms. Allocated memory is still 96.5 MB. Free memory was 62.3 MB in the beginning and 52.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1372.90 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 51.8 MB in the beginning and 66.1 MB in the end (delta: -14.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Witness Printer took 47.69 ms. Allocated memory is still 123.7 MB. Free memory was 66.1 MB in the beginning and 64.1 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 554]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L543] struct T* x = ((void *)0); [L544] struct T* y = ((void *)0); [L545] y = malloc(sizeof(*y)) [L546] intptr_t adressY = (intptr_t) y; [L547] free(y) [L547] free(y) [L547] free(y) [L548] x = malloc(sizeof(*x)) [L549] intptr_t adressX = (intptr_t) x; [L550] COND TRUE adressX == adressY [L552] free(x) [L552] free(x) [L552] free(x) [L554] free(x) [L554] free(x) [L554] free(x) - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: 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, 23 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 1223.7ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 32.4ms, AutomataDifference: 301.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 90 SDtfs, 74 SDslu, 24 SDs, 0 SdLazy, 60 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 112.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57.6ms AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 22.3ms SsaConstructionTime, 134.0ms SatisfiabilityAnalysisTime, 328.3ms InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 117 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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! [2021-10-24 09:46:29,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae31d3ff-8c97-4cf0-8f59-2a313a2ef40f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...