./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3 --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 bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-5709675 [2021-10-15 19:23:36,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:23:36,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:23:36,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:23:36,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:23:36,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:23:36,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:23:36,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:23:36,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:23:36,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:23:36,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:23:36,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:23:36,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:23:36,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:23:36,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:23:36,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:23:36,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:23:36,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:23:36,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:23:36,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:23:36,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:23:36,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:23:36,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:23:36,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:23:36,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:23:36,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:23:36,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:23:36,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:23:36,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:23:36,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:23:36,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:23:36,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:23:36,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:23:36,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:23:36,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:23:36,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:23:36,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:23:36,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:23:36,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:23:36,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:23:36,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:23:36,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 19:23:36,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:23:36,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:23:36,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:23:36,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:23:36,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:23:36,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:23:36,600 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:23:36,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:23:36,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:23:36,601 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:23:36,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:23:36,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:23:36,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:23:36,602 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:23:36,602 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:23:36,602 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 19:23:36,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:23:36,602 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:23:36,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:23:36,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:23:36,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:23:36,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:23:36,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:23:36,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:23:36,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:23:36,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:23:36,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:23:36,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:23:36,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:23:36,604 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_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 [2021-10-15 19:23:36,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:23:36,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:23:36,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:23:36,903 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:23:36,905 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:23:36,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-10-15 19:23:36,978 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/data/95ca36498/56d6461b329045d78f63cf12b3f63478/FLAGbd0b620f3 [2021-10-15 19:23:37,442 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:23:37,443 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-10-15 19:23:37,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/data/95ca36498/56d6461b329045d78f63cf12b3f63478/FLAGbd0b620f3 [2021-10-15 19:23:37,842 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/data/95ca36498/56d6461b329045d78f63cf12b3f63478 [2021-10-15 19:23:37,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:23:37,847 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:23:37,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:23:37,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:23:37,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:23:37,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:23:37" (1/1) ... [2021-10-15 19:23:37,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad02aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:37, skipping insertion in model container [2021-10-15 19:23:37,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:23:37" (1/1) ... [2021-10-15 19:23:37,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:23:37,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:23:38,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:23:38,071 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:23:38,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:23:38,098 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:23:38,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38 WrapperNode [2021-10-15 19:23:38,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:23:38,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:23:38,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:23:38,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:23:38,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (1/1) ... [2021-10-15 19:23:38,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (1/1) ... [2021-10-15 19:23:38,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (1/1) ... [2021-10-15 19:23:38,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (1/1) ... [2021-10-15 19:23:38,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (1/1) ... [2021-10-15 19:23:38,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (1/1) ... [2021-10-15 19:23:38,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (1/1) ... [2021-10-15 19:23:38,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:23:38,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:23:38,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:23:38,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:23:38,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (1/1) ... [2021-10-15 19:23:38,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:23:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:38,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:23:38,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:23:38,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:23:38,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:23:38,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:23:38,219 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:23:38,219 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:23:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-15 19:23:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:23:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:23:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:23:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:23:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:23:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:23:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:23:38,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:23:38,519 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-15 19:23:38,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:23:38 BoogieIcfgContainer [2021-10-15 19:23:38,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:23:38,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:23:38,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:23:38,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:23:38,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:23:37" (1/3) ... [2021-10-15 19:23:38,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562423e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:23:38, skipping insertion in model container [2021-10-15 19:23:38,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:23:38" (2/3) ... [2021-10-15 19:23:38,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562423e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:23:38, skipping insertion in model container [2021-10-15 19:23:38,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:23:38" (3/3) ... [2021-10-15 19:23:38,533 INFO L111 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2021-10-15 19:23:38,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:23:38,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-15 19:23:38,582 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:23:38,590 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, mConcurrency=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 [2021-10-15 19:23:38,591 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-15 19:23:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-10-15 19:23:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 19:23:38,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:38,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:38,617 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:38,622 INFO L82 PathProgramCache]: Analyzing trace with hash 996996062, now seen corresponding path program 1 times [2021-10-15 19:23:38,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:38,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823615698] [2021-10-15 19:23:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:38,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:38,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:38,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:38,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823615698] [2021-10-15 19:23:38,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823615698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:38,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:38,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:23:38,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085635000] [2021-10-15 19:23:38,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:23:38,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:38,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:23:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:23:38,895 INFO L87 Difference]: Start difference. First operand has 28 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 23 states have internal predecessors, (26), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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) [2021-10-15 19:23:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:38,971 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-15 19:23:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:23:38,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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 [2021-10-15 19:23:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:38,981 INFO L225 Difference]: With dead ends: 28 [2021-10-15 19:23:38,981 INFO L226 Difference]: Without dead ends: 25 [2021-10-15 19:23:38,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:23:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-15 19:23:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-15 19:23:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 21 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) [2021-10-15 19:23:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-15 19:23:39,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 8 [2021-10-15 19:23:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:39,049 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-15 19:23:39,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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) [2021-10-15 19:23:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-15 19:23:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 19:23:39,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:39,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:39,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:23:39,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 996995752, now seen corresponding path program 1 times [2021-10-15 19:23:39,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:39,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494969157] [2021-10-15 19:23:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:39,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:39,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:39,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494969157] [2021-10-15 19:23:39,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494969157] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:39,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:39,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:23:39,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009802137] [2021-10-15 19:23:39,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:23:39,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:23:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:39,155 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.25) 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) [2021-10-15 19:23:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:39,238 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-15 19:23:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:23:39,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) 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 [2021-10-15 19:23:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:39,240 INFO L225 Difference]: With dead ends: 31 [2021-10-15 19:23:39,240 INFO L226 Difference]: Without dead ends: 31 [2021-10-15 19:23:39,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-15 19:23:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-15 19:23:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.6) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-10-15 19:23:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-15 19:23:39,248 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 8 [2021-10-15 19:23:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:39,249 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-15 19:23:39,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) 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) [2021-10-15 19:23:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-15 19:23:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 19:23:39,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:39,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:39,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:23:39,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash 996995806, now seen corresponding path program 1 times [2021-10-15 19:23:39,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:39,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550387159] [2021-10-15 19:23:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:39,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:39,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:39,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550387159] [2021-10-15 19:23:39,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550387159] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:39,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:39,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:23:39,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95802067] [2021-10-15 19:23:39,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:23:39,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:23:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:39,393 INFO L87 Difference]: Start difference. First operand 26 states and 27 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) [2021-10-15 19:23:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:39,467 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-15 19:23:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:23:39,468 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 [2021-10-15 19:23:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:39,470 INFO L225 Difference]: With dead ends: 30 [2021-10-15 19:23:39,470 INFO L226 Difference]: Without dead ends: 30 [2021-10-15 19:23:39,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-15 19:23:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-10-15 19:23:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.625) internal successors, (26), 23 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) [2021-10-15 19:23:39,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-15 19:23:39,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 8 [2021-10-15 19:23:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:39,477 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-15 19:23:39,477 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) [2021-10-15 19:23:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-15 19:23:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 19:23:39,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:39,479 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:39,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:23:39,479 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 996995805, now seen corresponding path program 1 times [2021-10-15 19:23:39,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:39,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379000069] [2021-10-15 19:23:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:39,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:39,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:39,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379000069] [2021-10-15 19:23:39,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379000069] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:39,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:39,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:23:39,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300152707] [2021-10-15 19:23:39,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:23:39,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:39,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:23:39,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:39,566 INFO L87 Difference]: Start difference. First operand 27 states and 29 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) [2021-10-15 19:23:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:39,634 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-15 19:23:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:23:39,635 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 [2021-10-15 19:23:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:39,636 INFO L225 Difference]: With dead ends: 25 [2021-10-15 19:23:39,638 INFO L226 Difference]: Without dead ends: 25 [2021-10-15 19:23:39,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-15 19:23:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-15 19:23:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 20 states have internal predecessors, (22), 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) [2021-10-15 19:23:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-15 19:23:39,643 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2021-10-15 19:23:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:39,644 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-15 19:23:39,644 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) [2021-10-15 19:23:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-15 19:23:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 19:23:39,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:39,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:39,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:23:39,646 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:39,647 INFO L82 PathProgramCache]: Analyzing trace with hash 63449068, now seen corresponding path program 1 times [2021-10-15 19:23:39,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:39,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3610173] [2021-10-15 19:23:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:39,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:39,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:39,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3610173] [2021-10-15 19:23:39,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3610173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:39,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196330815] [2021-10-15 19:23:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:39,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:39,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:39,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:39,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:23:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:39,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:23:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:39,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196330815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:39,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:39,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-15 19:23:39,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910667716] [2021-10-15 19:23:39,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:23:39,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:23:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:23:39,893 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-15 19:23:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:39,961 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-15 19:23:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:23:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 [2021-10-15 19:23:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:39,964 INFO L225 Difference]: With dead ends: 31 [2021-10-15 19:23:39,965 INFO L226 Difference]: Without dead ends: 31 [2021-10-15 19:23:39,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:23:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-15 19:23:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-10-15 19:23:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-10-15 19:23:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-15 19:23:39,975 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2021-10-15 19:23:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:39,976 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-15 19:23:39,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-15 19:23:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-15 19:23:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 19:23:39,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:39,985 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:40,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:40,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:40,202 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash 63449121, now seen corresponding path program 1 times [2021-10-15 19:23:40,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:40,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430750892] [2021-10-15 19:23:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:40,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:40,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:40,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430750892] [2021-10-15 19:23:40,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430750892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:40,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196245057] [2021-10-15 19:23:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:40,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:40,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:40,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:23:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:40,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:23:40,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:40,505 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 [2021-10-15 19:23:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:40,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196245057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:40,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:40,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-10-15 19:23:40,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476362861] [2021-10-15 19:23:40,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:23:40,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:23:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:23:40,656 INFO L87 Difference]: Start difference. First operand 27 states and 28 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) [2021-10-15 19:23:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:40,719 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-15 19:23:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:23:40,720 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 [2021-10-15 19:23:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:40,721 INFO L225 Difference]: With dead ends: 28 [2021-10-15 19:23:40,721 INFO L226 Difference]: Without dead ends: 28 [2021-10-15 19:23:40,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:23:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-15 19:23:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-15 19:23:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 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) [2021-10-15 19:23:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-15 19:23:40,730 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 12 [2021-10-15 19:23:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:40,731 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-15 19:23:40,731 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) [2021-10-15 19:23:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-15 19:23:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-15 19:23:40,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:40,733 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:40,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:40,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:40,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:40,958 INFO L82 PathProgramCache]: Analyzing trace with hash -564445194, now seen corresponding path program 1 times [2021-10-15 19:23:40,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:40,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806868851] [2021-10-15 19:23:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:40,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:41,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:41,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:41,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806868851] [2021-10-15 19:23:41,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806868851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:41,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777224847] [2021-10-15 19:23:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:41,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:41,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:41,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:23:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:41,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:23:41,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:41,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777224847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:41,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:41,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-15 19:23:41,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094717665] [2021-10-15 19:23:41,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:23:41,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:23:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:23:41,260 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-10-15 19:23:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:41,321 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-10-15 19:23:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:23:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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 23 [2021-10-15 19:23:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:41,325 INFO L225 Difference]: With dead ends: 35 [2021-10-15 19:23:41,326 INFO L226 Difference]: Without dead ends: 35 [2021-10-15 19:23:41,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:23:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-15 19:23:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-10-15 19:23:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 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) [2021-10-15 19:23:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-15 19:23:41,344 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 23 [2021-10-15 19:23:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:41,345 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-15 19:23:41,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-10-15 19:23:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-15 19:23:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 19:23:41,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:41,348 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:41,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:41,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:41,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash 817658963, now seen corresponding path program 2 times [2021-10-15 19:23:41,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:41,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578128465] [2021-10-15 19:23:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:41,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:41,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:41,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:41,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578128465] [2021-10-15 19:23:41,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578128465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:41,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249553005] [2021-10-15 19:23:41,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:23:41,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:41,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:41,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:41,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:23:41,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 19:23:41,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:23:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:23:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-15 19:23:42,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249553005] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:42,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:23:42,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-10-15 19:23:42,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758420949] [2021-10-15 19:23:42,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:23:42,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:42,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:23:42,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:23:42,073 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-15 19:23:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:42,115 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-10-15 19:23:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:23:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 27 [2021-10-15 19:23:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:42,116 INFO L225 Difference]: With dead ends: 34 [2021-10-15 19:23:42,117 INFO L226 Difference]: Without dead ends: 32 [2021-10-15 19:23:42,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:23:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-15 19:23:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-15 19:23:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 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) [2021-10-15 19:23:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-15 19:23:42,121 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2021-10-15 19:23:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:42,121 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-15 19:23:42,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-10-15 19:23:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-15 19:23:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 19:23:42,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:42,123 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:42,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:42,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:42,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash 817651018, now seen corresponding path program 1 times [2021-10-15 19:23:42,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:42,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910530684] [2021-10-15 19:23:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:42,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:42,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:42,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:42,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910530684] [2021-10-15 19:23:42,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910530684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:42,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232879400] [2021-10-15 19:23:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:42,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:42,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:42,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:23:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:23:42,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:42,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232879400] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:42,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:42,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-10-15 19:23:42,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630995122] [2021-10-15 19:23:42,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:23:42,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:42,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:23:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:23:42,635 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-10-15 19:23:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:42,689 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-15 19:23:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:23:42,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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 27 [2021-10-15 19:23:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:42,690 INFO L225 Difference]: With dead ends: 39 [2021-10-15 19:23:42,690 INFO L226 Difference]: Without dead ends: 39 [2021-10-15 19:23:42,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:23:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-15 19:23:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-10-15 19:23:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 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) [2021-10-15 19:23:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-10-15 19:23:42,694 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 27 [2021-10-15 19:23:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:42,694 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-10-15 19:23:42,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-10-15 19:23:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-10-15 19:23:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-15 19:23:42,695 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:42,695 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:42,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:42,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:42,909 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1120001241, now seen corresponding path program 2 times [2021-10-15 19:23:42,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:42,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60608939] [2021-10-15 19:23:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:42,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:42,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:42,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:42,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60608939] [2021-10-15 19:23:42,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60608939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:42,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590968083] [2021-10-15 19:23:42,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:23:42,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:42,992 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:43,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:23:43,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:23:43,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:23:43,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:23:43,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:43,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590968083] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:43,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:43,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-10-15 19:23:43,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596686699] [2021-10-15 19:23:43,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:23:43,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:23:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:23:43,190 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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) [2021-10-15 19:23:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:43,241 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-10-15 19:23:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:23:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 31 [2021-10-15 19:23:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:43,243 INFO L225 Difference]: With dead ends: 43 [2021-10-15 19:23:43,243 INFO L226 Difference]: Without dead ends: 43 [2021-10-15 19:23:43,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:23:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-15 19:23:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-10-15 19:23:43,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 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) [2021-10-15 19:23:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-10-15 19:23:43,247 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 31 [2021-10-15 19:23:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:43,247 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-10-15 19:23:43,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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) [2021-10-15 19:23:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-10-15 19:23:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-15 19:23:43,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:43,249 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:43,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:43,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:23:43,468 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 92254852, now seen corresponding path program 3 times [2021-10-15 19:23:43,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:43,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314468841] [2021-10-15 19:23:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:43,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:43,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:43,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:43,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314468841] [2021-10-15 19:23:43,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314468841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:43,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275799231] [2021-10-15 19:23:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:23:43,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:43,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:43,602 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:43,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:23:43,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-15 19:23:43,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:23:43,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:23:43,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:43,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275799231] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:43,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:43,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-15 19:23:43,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378171190] [2021-10-15 19:23:43,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:23:43,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:43,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:23:43,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:23:43,873 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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) [2021-10-15 19:23:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:43,938 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-10-15 19:23:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:23:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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 35 [2021-10-15 19:23:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:43,940 INFO L225 Difference]: With dead ends: 47 [2021-10-15 19:23:43,941 INFO L226 Difference]: Without dead ends: 47 [2021-10-15 19:23:43,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:23:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-15 19:23:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-10-15 19:23:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 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) [2021-10-15 19:23:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-10-15 19:23:43,951 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2021-10-15 19:23:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:43,951 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-10-15 19:23:43,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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) [2021-10-15 19:23:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-10-15 19:23:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-15 19:23:43,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:43,958 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:43,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:44,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:44,174 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash 696273761, now seen corresponding path program 4 times [2021-10-15 19:23:44,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:44,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568492254] [2021-10-15 19:23:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:44,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:44,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:44,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:44,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568492254] [2021-10-15 19:23:44,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568492254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:44,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034979919] [2021-10-15 19:23:44,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:23:44,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:44,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:44,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:44,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:23:44,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:23:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:23:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:23:44,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:44,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034979919] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:44,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:44,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-10-15 19:23:44,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711561906] [2021-10-15 19:23:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:23:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:23:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:23:44,536 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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) [2021-10-15 19:23:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:44,604 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-10-15 19:23:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:23:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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 39 [2021-10-15 19:23:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:44,606 INFO L225 Difference]: With dead ends: 51 [2021-10-15 19:23:44,606 INFO L226 Difference]: Without dead ends: 51 [2021-10-15 19:23:44,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:23:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-15 19:23:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-10-15 19:23:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 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) [2021-10-15 19:23:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-10-15 19:23:44,611 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 39 [2021-10-15 19:23:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:44,611 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-10-15 19:23:44,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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) [2021-10-15 19:23:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-10-15 19:23:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-15 19:23:44,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:44,613 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:44,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:44,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:44,830 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1214304834, now seen corresponding path program 5 times [2021-10-15 19:23:44,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:44,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4453053] [2021-10-15 19:23:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:44,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:44,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:44,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4453053] [2021-10-15 19:23:44,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4453053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:44,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731016425] [2021-10-15 19:23:44,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:23:44,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:44,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:44,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:44,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:23:45,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-15 19:23:45,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:23:45,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:23:45,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:45,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731016425] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:45,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:45,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-10-15 19:23:45,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277421479] [2021-10-15 19:23:45,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:23:45,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:45,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:23:45,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:23:45,293 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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) [2021-10-15 19:23:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:45,363 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-10-15 19:23:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:23:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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 43 [2021-10-15 19:23:45,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:45,366 INFO L225 Difference]: With dead ends: 55 [2021-10-15 19:23:45,366 INFO L226 Difference]: Without dead ends: 55 [2021-10-15 19:23:45,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:23:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-15 19:23:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-10-15 19:23:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 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) [2021-10-15 19:23:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-10-15 19:23:45,378 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 43 [2021-10-15 19:23:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:45,378 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-10-15 19:23:45,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 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) [2021-10-15 19:23:45,379 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-10-15 19:23:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-15 19:23:45,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:45,381 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:45,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:45,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:23:45,596 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2090572187, now seen corresponding path program 6 times [2021-10-15 19:23:45,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:45,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102587742] [2021-10-15 19:23:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:45,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:45,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:23:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:45,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:45,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102587742] [2021-10-15 19:23:45,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102587742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:45,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145906949] [2021-10-15 19:23:45,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:23:45,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:45,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:45,740 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:45,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:23:45,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-15 19:23:45,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:23:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:23:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:23:46,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145906949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:23:46,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:23:46,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-10-15 19:23:46,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121183058] [2021-10-15 19:23:46,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:23:46,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:23:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:23:46,139 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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) [2021-10-15 19:23:46,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:23:46,209 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-10-15 19:23:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:23:46,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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 47 [2021-10-15 19:23:46,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:23:46,211 INFO L225 Difference]: With dead ends: 56 [2021-10-15 19:23:46,211 INFO L226 Difference]: Without dead ends: 56 [2021-10-15 19:23:46,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:23:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-15 19:23:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-15 19:23:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 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) [2021-10-15 19:23:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-10-15 19:23:46,216 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 47 [2021-10-15 19:23:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:23:46,216 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-10-15 19:23:46,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 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) [2021-10-15 19:23:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-10-15 19:23:46,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-15 19:23:46,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:23:46,217 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:46,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:46,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:46,429 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-15 19:23:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:46,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1402261240, now seen corresponding path program 7 times [2021-10-15 19:23:46,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:46,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738206327] [2021-10-15 19:23:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:46,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:23:46,465 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:23:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:23:46,531 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:23:46,531 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:23:46,532 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:46,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 19:23:46,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 19:23:46,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 19:23:46,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-15 19:23:46,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:46,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:46,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:23:46,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:23:46,542 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:23:46,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:23:46 BoogieIcfgContainer [2021-10-15 19:23:46,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:23:46,583 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:23:46,583 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:23:46,583 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:23:46,584 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:23:38" (3/4) ... [2021-10-15 19:23:46,586 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:23:46,632 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:23:46,632 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:23:46,633 INFO L168 Benchmark]: Toolchain (without parser) took 8786.07 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 54.2 MB in the beginning and 87.6 MB in the end (delta: -33.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:46,634 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 70.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:46,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.55 ms. Allocated memory is still 96.5 MB. Free memory was 54.0 MB in the beginning and 71.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:46,635 INFO L168 Benchmark]: Boogie Preprocessor took 31.12 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 70.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:46,635 INFO L168 Benchmark]: RCFGBuilder took 390.30 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 60.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:46,636 INFO L168 Benchmark]: TraceAbstraction took 8059.11 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 60.2 MB in the beginning and 90.8 MB in the end (delta: -30.5 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:46,636 INFO L168 Benchmark]: Witness Printer took 49.36 ms. Allocated memory is still 117.4 MB. Free memory was 90.8 MB in the beginning and 87.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:46,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 70.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.55 ms. Allocated memory is still 96.5 MB. Free memory was 54.0 MB in the beginning and 71.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.12 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 70.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 390.30 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 60.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8059.11 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 60.2 MB in the beginning and 90.8 MB in the end (delta: -30.5 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. * Witness Printer took 49.36 ms. Allocated memory is still 117.4 MB. Free memory was 90.8 MB in the beginning and 87.6 MB in the end (delta: 3.1 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: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; VAL [alloca(10 * sizeof(char))={11:0}, i=0, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-1, alloca(10 * sizeof(char))={11:0}, i=0, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=1, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, alloca(10 * sizeof(char))={11:0}, i=1, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=2, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=97, alloca(10 * sizeof(char))={11:0}, i=2, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=3, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-4, alloca(10 * sizeof(char))={11:0}, i=3, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=4, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-5, alloca(10 * sizeof(char))={11:0}, i=4, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=5, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-6, alloca(10 * sizeof(char))={11:0}, i=5, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=6, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-7, alloca(10 * sizeof(char))={11:0}, i=6, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=7, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-8, alloca(10 * sizeof(char))={11:0}, i=7, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=8, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-9, alloca(10 * sizeof(char))={11:0}, i=8, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=9, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-10, alloca(10 * sizeof(char))={11:0}, i=9, p={11:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] [L9] COND FALSE !(i < 10) VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] [L13] EXPR p[2] VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}, p[2]=97] [L13] COND TRUE p[2] == 'a' [L14] free(p) VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] [L14] free(p) VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] - UnprovableResult [Line: 10]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 10]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 7958.9ms, OverallIterations: 15, TraceHistogramMax: 10, EmptinessCheckTime: 37.2ms, AutomataDifference: 1026.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 220 SDtfs, 198 SDslu, 435 SDs, 0 SdLazy, 602 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 586.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 401 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 588.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=14, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 132.5ms AutomataMinimizationTime, 14 MinimizatonAttempts, 31 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 94.8ms SsaConstructionTime, 537.8ms SatisfiabilityAnalysisTime, 2787.4ms InterpolantComputationTime, 675 NumberOfCodeBlocks, 651 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 600 ConstructedInterpolants, 1 QuantifiedInterpolants, 1881 SizeOfPredicates, 3 NumberOfNonLiveVariables, 983 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 24 InterpolantComputations, 5 PerfectInterpolantSequences, 28/1098 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! [2021-10-15 19:23:46,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d7f2e55-2127-4704-a4ca-288e84ef8496/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...