./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c5050f69dd0fe75249366946a38ba884fb5943ccf611397d2d01e0ccda347b5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:23:01,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:23:01,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:23:01,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:23:01,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:23:01,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:23:01,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:23:01,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:23:01,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:23:01,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:23:01,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:23:01,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:23:01,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:23:01,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:23:01,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:23:01,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:23:01,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:23:01,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:23:01,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:23:01,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:23:01,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:23:01,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:23:01,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:23:01,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:23:01,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:23:01,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:23:01,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:23:01,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:23:01,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:23:01,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:23:01,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:23:01,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:23:01,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:23:01,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:23:01,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:23:01,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:23:01,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:23:01,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:23:01,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:23:01,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:23:01,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:23:01,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:23:01,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:23:01,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:23:01,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:23:01,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:23:01,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:23:01,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:23:01,796 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:23:01,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:23:01,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:23:01,797 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:23:01,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:23:01,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:23:01,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:23:01,799 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:23:01,799 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:23:01,799 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:23:01,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:23:01,800 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:23:01,800 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:23:01,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:23:01,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:23:01,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:23:01,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:23:01,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:01,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:23:01,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:23:01,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:23:01,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:23:01,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:23:01,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c5050f69dd0fe75249366946a38ba884fb5943ccf611397d2d01e0ccda347b5 [2021-10-28 09:23:02,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:23:02,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:23:02,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:23:02,127 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:23:02,136 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:23:02,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-28 09:23:02,220 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/data/c6a002b80/5545f27865a8435f96682a7ec98e751b/FLAG094cdee88 [2021-10-28 09:23:02,642 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:23:02,642 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-28 09:23:02,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/data/c6a002b80/5545f27865a8435f96682a7ec98e751b/FLAG094cdee88 [2021-10-28 09:23:03,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/data/c6a002b80/5545f27865a8435f96682a7ec98e751b [2021-10-28 09:23:03,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:23:03,038 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:23:03,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:03,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:23:03,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:23:03,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dbbc77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03, skipping insertion in model container [2021-10-28 09:23:03,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:23:03,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:23:03,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:03,240 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:23:03,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:03,268 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:23:03,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03 WrapperNode [2021-10-28 09:23:03,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:03,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:23:03,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:23:03,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:23:03,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:23:03,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:23:03,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:23:03,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:23:03,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (1/1) ... [2021-10-28 09:23:03,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:03,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:03,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:23:03,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:23:03,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:23:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:23:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:23:03,410 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:23:03,411 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:23:03,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:23:03,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:23:03,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:23:03,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:23:03,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:23:03,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:23:03,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:23:03,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:23:03,635 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-28 09:23:03,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:03 BoogieIcfgContainer [2021-10-28 09:23:03,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:23:03,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:23:03,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:23:03,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:23:03,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:23:03" (1/3) ... [2021-10-28 09:23:03,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ac34d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:23:03, skipping insertion in model container [2021-10-28 09:23:03,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:03" (2/3) ... [2021-10-28 09:23:03,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ac34d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:23:03, skipping insertion in model container [2021-10-28 09:23:03,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:03" (3/3) ... [2021-10-28 09:23:03,646 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2021-10-28 09:23:03,651 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:23:03,651 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-28 09:23:03,702 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:23:03,709 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 [2021-10-28 09:23:03,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-28 09:23:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:23:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:23:03,731 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:03,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:03,732 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 2 more)] === [2021-10-28 09:23:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 868112163, now seen corresponding path program 1 times [2021-10-28 09:23:03,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:03,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147464774] [2021-10-28 09:23:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:03,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:03,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:03,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:03,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147464774] [2021-10-28 09:23:03,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147464774] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:03,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:03,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:23:03,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303914965] [2021-10-28 09:23:03,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:23:03,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:03,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:23:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:23:03,970 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:04,096 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-28 09:23:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:23:04,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 09:23:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:04,106 INFO L225 Difference]: With dead ends: 29 [2021-10-28 09:23:04,116 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 09:23:04,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:23:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 09:23:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-10-28 09:23:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-28 09:23:04,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 8 [2021-10-28 09:23:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:04,162 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-28 09:23:04,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-28 09:23:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:23:04,163 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:04,163 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:23:04,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 2 more)] === [2021-10-28 09:23:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash 868112162, now seen corresponding path program 1 times [2021-10-28 09:23:04,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:04,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2641839] [2021-10-28 09:23:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:04,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:04,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:04,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:04,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2641839] [2021-10-28 09:23:04,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2641839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:04,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:04,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:23:04,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126151380] [2021-10-28 09:23:04,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:23:04,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:23:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:23:04,268 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:04,344 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-28 09:23:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:23:04,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 09:23:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:04,346 INFO L225 Difference]: With dead ends: 30 [2021-10-28 09:23:04,346 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 09:23:04,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:23:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 09:23:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-10-28 09:23:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-28 09:23:04,357 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 8 [2021-10-28 09:23:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:04,358 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-28 09:23:04,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-28 09:23:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:23:04,360 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:04,360 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:04,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:23:04,361 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 2 more)] === [2021-10-28 09:23:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash -258436314, now seen corresponding path program 1 times [2021-10-28 09:23:04,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:04,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717321661] [2021-10-28 09:23:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:04,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:04,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:04,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:04,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717321661] [2021-10-28 09:23:04,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717321661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:04,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807886193] [2021-10-28 09:23:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:04,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:04,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:04,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:04,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:23:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:23:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:04,719 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 [2021-10-28 09:23:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:04,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807886193] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:04,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:04,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-10-28 09:23:04,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509747471] [2021-10-28 09:23:04,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:23:04,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:04,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:23:04,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:23:04,873 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:04,940 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-28 09:23:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:23:04,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 09:23:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:04,942 INFO L225 Difference]: With dead ends: 30 [2021-10-28 09:23:04,942 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 09:23:04,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:23:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 09:23:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 09:23:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-28 09:23:04,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 12 [2021-10-28 09:23:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:04,948 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-28 09:23:04,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-28 09:23:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:23:04,950 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:04,950 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:04,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:05,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:05,174 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 2 more)] === [2021-10-28 09:23:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1666776813, now seen corresponding path program 1 times [2021-10-28 09:23:05,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:05,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159138832] [2021-10-28 09:23:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:05,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:05,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 09:23:05,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:05,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159138832] [2021-10-28 09:23:05,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159138832] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:05,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:05,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:23:05,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860364313] [2021-10-28 09:23:05,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:23:05,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:23:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:23:05,290 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:05,321 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-10-28 09:23:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:23:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:23:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:05,325 INFO L225 Difference]: With dead ends: 29 [2021-10-28 09:23:05,325 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 09:23:05,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:23:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 09:23:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-28 09:23:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-10-28 09:23:05,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2021-10-28 09:23:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:05,336 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-10-28 09:23:05,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-10-28 09:23:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:23:05,338 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:05,338 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:05,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:23:05,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 2 more)] === [2021-10-28 09:23:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:05,339 INFO L85 PathProgramCache]: Analyzing trace with hash -242667132, now seen corresponding path program 1 times [2021-10-28 09:23:05,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:05,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145453985] [2021-10-28 09:23:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:05,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:05,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:05,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145453985] [2021-10-28 09:23:05,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145453985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:05,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139086658] [2021-10-28 09:23:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:05,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:05,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:05,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:05,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:23:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:05,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:23:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:05,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139086658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:05,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:05,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-28 09:23:05,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412092141] [2021-10-28 09:23:05,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:23:05,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:23:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:23:05,574 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:05,618 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-10-28 09:23:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:23:05,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 09:23:05,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:05,620 INFO L225 Difference]: With dead ends: 36 [2021-10-28 09:23:05,620 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:23:05,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:23:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:23:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-10-28 09:23:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-10-28 09:23:05,625 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 21 [2021-10-28 09:23:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:05,626 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-10-28 09:23:05,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-10-28 09:23:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 09:23:05,627 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:05,627 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:05,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:05,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:05,841 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 2 more)] === [2021-10-28 09:23:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash 130667105, now seen corresponding path program 2 times [2021-10-28 09:23:05,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:05,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013251463] [2021-10-28 09:23:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:05,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:05,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:05,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013251463] [2021-10-28 09:23:05,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013251463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:05,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682145986] [2021-10-28 09:23:05,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:23:05,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:05,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:05,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:23:06,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:23:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:23:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:23:06,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:06,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682145986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:06,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:06,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-10-28 09:23:06,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714047489] [2021-10-28 09:23:06,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:23:06,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:23:06,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:23:06,122 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:06,196 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-10-28 09:23:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:23:06,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-28 09:23:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:06,198 INFO L225 Difference]: With dead ends: 40 [2021-10-28 09:23:06,198 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 09:23:06,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:23:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 09:23:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-10-28 09:23:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-10-28 09:23:06,211 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 25 [2021-10-28 09:23:06,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:06,211 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-10-28 09:23:06,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-10-28 09:23:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:23:06,212 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:06,212 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:06,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:06,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 09:23:06,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 2 more)] === [2021-10-28 09:23:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash -656098114, now seen corresponding path program 3 times [2021-10-28 09:23:06,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:06,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562451540] [2021-10-28 09:23:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:06,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:06,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:06,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562451540] [2021-10-28 09:23:06,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562451540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:06,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242952547] [2021-10-28 09:23:06,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:23:06,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:06,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:06,592 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:06,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:23:06,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:23:06,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:23:06,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:23:06,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:06,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242952547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:06,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:06,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-10-28 09:23:06,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669297670] [2021-10-28 09:23:06,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:23:06,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:23:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:23:06,770 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:06,833 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-10-28 09:23:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:23:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-28 09:23:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:06,835 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:23:06,835 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 09:23:06,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:23:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 09:23:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-28 09:23:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-10-28 09:23:06,845 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2021-10-28 09:23:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:06,846 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-10-28 09:23:06,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:23:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-10-28 09:23:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:23:06,848 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:06,848 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:06,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:07,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:07,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 2 more)] === [2021-10-28 09:23:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1037842699, now seen corresponding path program 1 times [2021-10-28 09:23:07,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:07,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496994533] [2021-10-28 09:23:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:07,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:23:07,091 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:23:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:23:07,137 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:23:07,138 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:23:07,139 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:23:07,141 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:23:07,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:23:07,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:23:07,143 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:23:07,144 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:23:07,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:23:07,148 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2021-10-28 09:23:07,152 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:23:07,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:23:07 BoogieIcfgContainer [2021-10-28 09:23:07,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:23:07,200 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:23:07,200 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:23:07,200 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:23:07,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:03" (3/4) ... [2021-10-28 09:23:07,203 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:23:07,240 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:23:07,240 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:23:07,242 INFO L168 Benchmark]: Toolchain (without parser) took 4202.63 ms. Allocated memory was 123.7 MB in the beginning and 167.8 MB in the end (delta: 44.0 MB). Free memory was 84.6 MB in the beginning and 118.0 MB in the end (delta: -33.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:07,242 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 123.7 MB. Free memory is still 101.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:07,243 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.65 ms. Allocated memory is still 123.7 MB. Free memory was 84.4 MB in the beginning and 99.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:07,243 INFO L168 Benchmark]: Boogie Preprocessor took 53.78 ms. Allocated memory is still 123.7 MB. Free memory was 99.5 MB in the beginning and 98.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:07,244 INFO L168 Benchmark]: RCFGBuilder took 312.24 ms. Allocated memory is still 123.7 MB. Free memory was 97.9 MB in the beginning and 88.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:07,244 INFO L168 Benchmark]: TraceAbstraction took 3560.31 ms. Allocated memory was 123.7 MB in the beginning and 167.8 MB in the end (delta: 44.0 MB). Free memory was 88.0 MB in the beginning and 120.1 MB in the end (delta: -32.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:07,245 INFO L168 Benchmark]: Witness Printer took 40.57 ms. Allocated memory is still 167.8 MB. Free memory was 120.1 MB in the beginning and 118.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:07,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 123.7 MB. Free memory is still 101.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.65 ms. Allocated memory is still 123.7 MB. Free memory was 84.4 MB in the beginning and 99.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.78 ms. Allocated memory is still 123.7 MB. Free memory was 99.5 MB in the beginning and 98.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 312.24 ms. Allocated memory is still 123.7 MB. Free memory was 97.9 MB in the beginning and 88.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3560.31 ms. Allocated memory was 123.7 MB in the beginning and 167.8 MB in the end (delta: 44.0 MB). Free memory was 88.0 MB in the beginning and 120.1 MB in the end (delta: -32.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Witness Printer took 40.57 ms. Allocated memory is still 167.8 MB. Free memory was 120.1 MB in the beginning and 118.0 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: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; VAL [i=0, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=0, p={-1:0}] [L9] p[i] = 1 VAL [i=0, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=0, p={-1:0}] [L8] i++ VAL [i=1, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=1, p={-1:0}] [L9] p[i] = 1 VAL [i=1, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=1, p={-1:0}] [L8] i++ VAL [i=2, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=2, p={-1:0}] [L9] p[i] = 1 VAL [i=2, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=2, p={-1:0}] [L8] i++ VAL [i=3, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=3, p={-1:0}] [L9] p[i] = 1 VAL [i=3, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=3, p={-1:0}] [L8] i++ VAL [i=4, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=4, p={-1:0}] [L9] p[i] = 1 VAL [i=4, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=4, p={-1:0}] [L8] i++ VAL [i=5, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=5, p={-1:0}] [L9] p[i] = 1 VAL [i=5, p={-1:0}] [L10] COND TRUE i == 5 VAL [i=5, p={-1:0}] [L11] free(p) VAL [i=5, p={-1:0}] [L11] free(p) VAL [i=5, p={-1:0}] [L11] free(p) [L8] i++ VAL [i=6, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=6, p={-1:0}] [L9] p[i] = 1 - UnprovableResult [Line: 9]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 5]: 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 3 procedures, 24 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 7, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 93 SDslu, 121 SDs, 0 SdLazy, 309 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=7, InterpolantAutomatonStates: 43, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 244 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 656 SizeOfPredicates, 0 NumberOfNonLiveVariables, 283 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 10/190 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! [2021-10-28 09:23:07,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a880c2b-a297-4311-9e1c-225b58b2e2ab/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...