./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer --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 0.2.0-a4ecdab [2020-11-29 18:19:47,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:19:47,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:19:47,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:19:47,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:19:47,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:19:47,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:19:47,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:19:47,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:19:47,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:19:47,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:19:47,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:19:47,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:19:47,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:19:47,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:19:47,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:19:47,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:19:47,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:19:47,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:19:47,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:19:47,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:19:47,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:19:47,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:19:47,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:19:47,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:19:47,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:19:47,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:19:47,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:19:47,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:19:47,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:19:47,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:19:47,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:19:47,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:19:47,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:19:47,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:19:47,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:19:47,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:19:47,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:19:47,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:19:47,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:19:47,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:19:47,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 18:19:48,009 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:19:48,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:19:48,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:19:48,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:19:48,012 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:19:48,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:19:48,013 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:19:48,013 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 18:19:48,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:19:48,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:19:48,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:19:48,015 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 18:19:48,016 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 18:19:48,016 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 18:19:48,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:19:48,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 18:19:48,017 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:19:48,017 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:19:48,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:19:48,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:19:48,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:19:48,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:19:48,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:19:48,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:19:48,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:19:48,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:19:48,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:19:48,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:19:48,020 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-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 [2020-11-29 18:19:48,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:19:48,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:19:48,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:19:48,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:19:48,407 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:19:48,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2020-11-29 18:19:48,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/data/73bd7d022/0924644b21f74a6b954630b23e7efaaf/FLAG1bff463c5 [2020-11-29 18:19:49,208 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:19:49,209 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2020-11-29 18:19:49,222 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/data/73bd7d022/0924644b21f74a6b954630b23e7efaaf/FLAG1bff463c5 [2020-11-29 18:19:49,583 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/data/73bd7d022/0924644b21f74a6b954630b23e7efaaf [2020-11-29 18:19:49,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:19:49,591 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 18:19:49,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:19:49,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:19:49,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:19:49,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b598fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49, skipping insertion in model container [2020-11-29 18:19:49,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:19:49,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:19:49,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:19:49,825 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:19:49,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:19:49,879 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:19:49,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49 WrapperNode [2020-11-29 18:19:49,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:19:49,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:19:49,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:19:49,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:19:49,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (1/1) ... [2020-11-29 18:19:49,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:19:49,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:19:49,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:19:49,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:19:49,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:19:50,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 18:19:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:19:50,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 18:19:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 18:19:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 18:19:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-29 18:19:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 18:19:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:19:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:19:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:19:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 18:19:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 18:19:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:19:50,582 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:19:50,583 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-29 18:19:50,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:19:50 BoogieIcfgContainer [2020-11-29 18:19:50,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:19:50,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:19:50,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:19:50,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:19:50,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:19:49" (1/3) ... [2020-11-29 18:19:50,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2393ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:19:50, skipping insertion in model container [2020-11-29 18:19:50,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:49" (2/3) ... [2020-11-29 18:19:50,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2393ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:19:50, skipping insertion in model container [2020-11-29 18:19:50,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:19:50" (3/3) ... [2020-11-29 18:19:50,598 INFO L111 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2020-11-29 18:19:50,611 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:19:50,617 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-29 18:19:50,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-29 18:19:50,669 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:19:50,670 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 18:19:50,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:19:50,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:19:50,670 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:19:50,670 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:19:50,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:19:50,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:19:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-29 18:19:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 18:19:50,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:50,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:50,711 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:50,720 INFO L82 PathProgramCache]: Analyzing trace with hash 996996062, now seen corresponding path program 1 times [2020-11-29 18:19:50,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:50,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485537240] [2020-11-29 18:19:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:50,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:50,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485537240] [2020-11-29 18:19:50,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:19:50,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:19:50,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518984835] [2020-11-29 18:19:50,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 18:19:50,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:19:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:19:50,998 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-11-29 18:19:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:51,158 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-29 18:19:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:19:51,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-29 18:19:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:51,179 INFO L225 Difference]: With dead ends: 28 [2020-11-29 18:19:51,187 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 18:19:51,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:19:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 18:19:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-29 18:19:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 18:19:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-29 18:19:51,225 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 8 [2020-11-29 18:19:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:51,226 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-29 18:19:51,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 18:19:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-29 18:19:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 18:19:51,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:51,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:51,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:19:51,228 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash 996995752, now seen corresponding path program 1 times [2020-11-29 18:19:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:51,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350196778] [2020-11-29 18:19:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:51,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:51,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350196778] [2020-11-29 18:19:51,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:19:51,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:19:51,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080478652] [2020-11-29 18:19:51,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:19:51,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:19:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:51,374 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2020-11-29 18:19:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:51,455 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-29 18:19:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:19:51,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 18:19:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:51,457 INFO L225 Difference]: With dead ends: 31 [2020-11-29 18:19:51,457 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 18:19:51,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 18:19:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-11-29 18:19:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 18:19:51,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-29 18:19:51,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 8 [2020-11-29 18:19:51,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:51,465 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-29 18:19:51,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:19:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-29 18:19:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 18:19:51,466 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:51,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:51,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:19:51,469 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:51,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:51,470 INFO L82 PathProgramCache]: Analyzing trace with hash 996995806, now seen corresponding path program 1 times [2020-11-29 18:19:51,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:51,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885597427] [2020-11-29 18:19:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:51,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:51,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885597427] [2020-11-29 18:19:51,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:19:51,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:19:51,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413856348] [2020-11-29 18:19:51,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:19:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:19:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:51,554 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2020-11-29 18:19:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:51,632 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-11-29 18:19:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:19:51,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 18:19:51,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:51,634 INFO L225 Difference]: With dead ends: 30 [2020-11-29 18:19:51,634 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 18:19:51,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 18:19:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-11-29 18:19:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 18:19:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-11-29 18:19:51,640 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 8 [2020-11-29 18:19:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:51,640 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-11-29 18:19:51,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:19:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-11-29 18:19:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 18:19:51,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:51,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:51,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 18:19:51,642 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash 996995805, now seen corresponding path program 1 times [2020-11-29 18:19:51,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:51,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236112944] [2020-11-29 18:19:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:51,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:51,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236112944] [2020-11-29 18:19:51,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:19:51,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:19:51,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586780559] [2020-11-29 18:19:51,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:19:51,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:51,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:19:51,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:51,717 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 4 states. [2020-11-29 18:19:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:51,781 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-29 18:19:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:19:51,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 18:19:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:51,783 INFO L225 Difference]: With dead ends: 25 [2020-11-29 18:19:51,783 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 18:19:51,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 18:19:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-29 18:19:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 18:19:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-29 18:19:51,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2020-11-29 18:19:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:51,789 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-29 18:19:51,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:19:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-29 18:19:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 18:19:51,790 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:51,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:51,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 18:19:51,791 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:51,791 INFO L82 PathProgramCache]: Analyzing trace with hash 63449068, now seen corresponding path program 1 times [2020-11-29 18:19:51,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:51,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145732683] [2020-11-29 18:19:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:19:51,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145732683] [2020-11-29 18:19:51,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:19:51,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:19:51,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44090754] [2020-11-29 18:19:51,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:19:51,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:19:51,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:51,859 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2020-11-29 18:19:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:51,918 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-29 18:19:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:19:51,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 18:19:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:51,920 INFO L225 Difference]: With dead ends: 22 [2020-11-29 18:19:51,920 INFO L226 Difference]: Without dead ends: 22 [2020-11-29 18:19:51,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-29 18:19:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-29 18:19:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 18:19:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-29 18:19:51,925 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2020-11-29 18:19:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:51,925 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-29 18:19:51,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:19:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-29 18:19:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 18:19:51,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:51,927 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:51,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 18:19:51,930 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash 63449121, now seen corresponding path program 1 times [2020-11-29 18:19:51,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:51,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643302540] [2020-11-29 18:19:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:52,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:52,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643302540] [2020-11-29 18:19:52,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554977767] [2020-11-29 18:19:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:19:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:52,227 INFO L384 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 [2020-11-29 18:19:52,228 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:19:52,245 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:19:52,246 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:19:52,246 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 18:19:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:52,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:19:52,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-11-29 18:19:52,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604080513] [2020-11-29 18:19:52,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:19:52,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:19:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:19:52,290 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-11-29 18:19:52,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:52,395 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-29 18:19:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:19:52,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-29 18:19:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:52,403 INFO L225 Difference]: With dead ends: 28 [2020-11-29 18:19:52,403 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 18:19:52,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:19:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 18:19:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 18:19:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 18:19:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-29 18:19:52,409 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 12 [2020-11-29 18:19:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:52,409 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-29 18:19:52,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:19:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-29 18:19:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 18:19:52,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:52,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:52,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 18:19:52,640 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash -564445194, now seen corresponding path program 1 times [2020-11-29 18:19:52,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:52,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672079950] [2020-11-29 18:19:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:52,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:52,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672079950] [2020-11-29 18:19:52,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816882592] [2020-11-29 18:19:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:52,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:19:52,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:52,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:19:52,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-29 18:19:52,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633252757] [2020-11-29 18:19:52,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 18:19:52,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:19:52,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:19:52,834 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-11-29 18:19:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:52,892 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-11-29 18:19:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:19:52,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-29 18:19:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:52,894 INFO L225 Difference]: With dead ends: 35 [2020-11-29 18:19:52,894 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 18:19:52,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:19:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 18:19:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-11-29 18:19:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 18:19:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-29 18:19:52,899 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 23 [2020-11-29 18:19:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:52,900 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-29 18:19:52,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 18:19:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-29 18:19:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 18:19:52,901 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:52,901 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:53,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:53,102 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash 817658963, now seen corresponding path program 2 times [2020-11-29 18:19:53,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:53,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927791586] [2020-11-29 18:19:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:53,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927791586] [2020-11-29 18:19:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081172242] [2020-11-29 18:19:53,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:53,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 18:19:53,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:19:53,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:19:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-29 18:19:53,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:19:53,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2020-11-29 18:19:53,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562266533] [2020-11-29 18:19:53,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:19:53,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:19:53,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:19:53,347 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 5 states. [2020-11-29 18:19:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:53,389 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-11-29 18:19:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:19:53,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-11-29 18:19:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:53,391 INFO L225 Difference]: With dead ends: 34 [2020-11-29 18:19:53,391 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 18:19:53,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:19:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 18:19:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-29 18:19:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 18:19:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-11-29 18:19:53,395 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2020-11-29 18:19:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:53,396 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-11-29 18:19:53,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:19:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-11-29 18:19:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 18:19:53,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:53,397 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:53,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:53,612 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:53,612 INFO L82 PathProgramCache]: Analyzing trace with hash 817651018, now seen corresponding path program 1 times [2020-11-29 18:19:53,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:53,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349300148] [2020-11-29 18:19:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:53,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:53,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349300148] [2020-11-29 18:19:53,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288839069] [2020-11-29 18:19:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:19:53,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:53,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:19:53,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-29 18:19:53,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120446814] [2020-11-29 18:19:53,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 18:19:53,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:53,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 18:19:53,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:19:53,841 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-11-29 18:19:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:53,919 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-11-29 18:19:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:19:53,919 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-11-29 18:19:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:53,920 INFO L225 Difference]: With dead ends: 39 [2020-11-29 18:19:53,920 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 18:19:53,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:19:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 18:19:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-11-29 18:19:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 18:19:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-11-29 18:19:53,924 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 27 [2020-11-29 18:19:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:53,925 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-11-29 18:19:53,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 18:19:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-11-29 18:19:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 18:19:53,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:53,926 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:54,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:54,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1120001241, now seen corresponding path program 2 times [2020-11-29 18:19:54,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:54,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312220760] [2020-11-29 18:19:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:54,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:54,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312220760] [2020-11-29 18:19:54,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201454578] [2020-11-29 18:19:54,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:54,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:19:54,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:19:54,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:19:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:54,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:19:54,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-29 18:19:54,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191363308] [2020-11-29 18:19:54,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:19:54,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:54,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:19:54,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:19:54,444 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 10 states. [2020-11-29 18:19:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:54,529 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-11-29 18:19:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:19:54,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-11-29 18:19:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:54,531 INFO L225 Difference]: With dead ends: 43 [2020-11-29 18:19:54,531 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 18:19:54,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:19:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 18:19:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-11-29 18:19:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 18:19:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-11-29 18:19:54,536 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 31 [2020-11-29 18:19:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:54,536 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-11-29 18:19:54,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:19:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-11-29 18:19:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 18:19:54,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:54,537 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:54,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 18:19:54,747 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:54,748 INFO L82 PathProgramCache]: Analyzing trace with hash 92254852, now seen corresponding path program 3 times [2020-11-29 18:19:54,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:54,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871200958] [2020-11-29 18:19:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:54,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:54,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871200958] [2020-11-29 18:19:54,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185373522] [2020-11-29 18:19:54,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:54,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-29 18:19:54,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:19:54,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:19:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:55,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:19:55,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-29 18:19:55,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051021927] [2020-11-29 18:19:55,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 18:19:55,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:55,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:19:55,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:19:55,045 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 11 states. [2020-11-29 18:19:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:55,153 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-11-29 18:19:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:19:55,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-11-29 18:19:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:55,154 INFO L225 Difference]: With dead ends: 47 [2020-11-29 18:19:55,155 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 18:19:55,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:19:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 18:19:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-29 18:19:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 18:19:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-11-29 18:19:55,159 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2020-11-29 18:19:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:55,160 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-11-29 18:19:55,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 18:19:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-11-29 18:19:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 18:19:55,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:55,161 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:55,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:55,381 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash 696273761, now seen corresponding path program 4 times [2020-11-29 18:19:55,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:55,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633796494] [2020-11-29 18:19:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:55,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:55,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633796494] [2020-11-29 18:19:55,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182377361] [2020-11-29 18:19:55,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:55,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:19:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:19:55,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:19:55,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:55,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:19:55,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-29 18:19:55,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204399671] [2020-11-29 18:19:55,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:19:55,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:55,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:19:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:19:55,676 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 12 states. [2020-11-29 18:19:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:55,772 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-11-29 18:19:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:19:55,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-11-29 18:19:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:55,773 INFO L225 Difference]: With dead ends: 51 [2020-11-29 18:19:55,773 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 18:19:55,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:19:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 18:19:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-11-29 18:19:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 18:19:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-11-29 18:19:55,778 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 39 [2020-11-29 18:19:55,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:55,779 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-11-29 18:19:55,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:19:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-11-29 18:19:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 18:19:55,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:55,780 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:56,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:56,008 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1214304834, now seen corresponding path program 5 times [2020-11-29 18:19:56,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:56,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541191452] [2020-11-29 18:19:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:56,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:56,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541191452] [2020-11-29 18:19:56,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612976959] [2020-11-29 18:19:56,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:56,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-29 18:19:56,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:19:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:19:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:56,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:19:56,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-29 18:19:56,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019417160] [2020-11-29 18:19:56,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:19:56,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:19:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:19:56,342 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 13 states. [2020-11-29 18:19:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:56,433 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-11-29 18:19:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:19:56,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-11-29 18:19:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:56,435 INFO L225 Difference]: With dead ends: 55 [2020-11-29 18:19:56,435 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 18:19:56,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:19:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 18:19:56,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-11-29 18:19:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 18:19:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-11-29 18:19:56,440 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 43 [2020-11-29 18:19:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:56,440 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-11-29 18:19:56,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:19:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-11-29 18:19:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 18:19:56,441 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:56,441 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:56,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 18:19:56,660 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2090572187, now seen corresponding path program 6 times [2020-11-29 18:19:56,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:56,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528063358] [2020-11-29 18:19:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:56,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 18:19:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:56,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528063358] [2020-11-29 18:19:56,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298687438] [2020-11-29 18:19:56,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:56,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-29 18:19:56,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:19:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:19:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:57,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:19:57,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-11-29 18:19:57,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080462579] [2020-11-29 18:19:57,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 18:19:57,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:57,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 18:19:57,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:19:57,028 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 14 states. [2020-11-29 18:19:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:57,130 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-11-29 18:19:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 18:19:57,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-11-29 18:19:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:57,131 INFO L225 Difference]: With dead ends: 56 [2020-11-29 18:19:57,131 INFO L226 Difference]: Without dead ends: 56 [2020-11-29 18:19:57,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:19:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-29 18:19:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-29 18:19:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 18:19:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-11-29 18:19:57,138 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 47 [2020-11-29 18:19:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:57,138 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-11-29 18:19:57,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 18:19:57,138 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-11-29 18:19:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 18:19:57,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:57,139 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:57,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:57,366 INFO L429 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-29 18:19:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:57,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1402261240, now seen corresponding path program 7 times [2020-11-29 18:19:57,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:57,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108435892] [2020-11-29 18:19:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:19:57,406 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:19:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:19:57,460 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:19:57,493 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:19:57,494 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:19:57,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-29 18:19:57,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:19:57 BoogieIcfgContainer [2020-11-29 18:19:57,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:19:57,543 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:19:57,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:19:57,543 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:19:57,544 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:19:50" (3/4) ... [2020-11-29 18:19:57,546 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:19:57,632 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9fbb44c5-8fd6-408f-9fd6-cb70c22b81b0/bin/uautomizer/witness.graphml [2020-11-29 18:19:57,632 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:19:57,634 INFO L168 Benchmark]: Toolchain (without parser) took 8041.97 ms. Allocated memory was 123.7 MB in the beginning and 182.5 MB in the end (delta: 58.7 MB). Free memory was 93.9 MB in the beginning and 105.7 MB in the end (delta: -11.8 MB). Peak memory consumption was 46.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:57,635 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 83.9 MB. Free memory was 42.4 MB in the beginning and 42.3 MB in the end (delta: 42.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:19:57,635 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.27 ms. Allocated memory is still 123.7 MB. Free memory was 93.9 MB in the beginning and 100.3 MB in the end (delta: -6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:57,635 INFO L168 Benchmark]: Boogie Preprocessor took 40.56 ms. Allocated memory is still 123.7 MB. Free memory was 100.3 MB in the beginning and 98.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:19:57,636 INFO L168 Benchmark]: RCFGBuilder took 663.37 ms. Allocated memory is still 123.7 MB. Free memory was 98.8 MB in the beginning and 86.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:57,637 INFO L168 Benchmark]: TraceAbstraction took 6952.28 ms. Allocated memory was 123.7 MB in the beginning and 182.5 MB in the end (delta: 58.7 MB). Free memory was 85.6 MB in the beginning and 107.8 MB in the end (delta: -22.2 MB). Peak memory consumption was 36.9 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:57,637 INFO L168 Benchmark]: Witness Printer took 89.12 ms. Allocated memory is still 182.5 MB. Free memory was 107.8 MB in the beginning and 105.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:57,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 83.9 MB. Free memory was 42.4 MB in the beginning and 42.3 MB in the end (delta: 42.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.27 ms. Allocated memory is still 123.7 MB. Free memory was 93.9 MB in the beginning and 100.3 MB in the end (delta: -6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.56 ms. Allocated memory is still 123.7 MB. Free memory was 100.3 MB in the beginning and 98.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 663.37 ms. Allocated memory is still 123.7 MB. Free memory was 98.8 MB in the beginning and 86.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6952.28 ms. Allocated memory was 123.7 MB in the beginning and 182.5 MB in the end (delta: 58.7 MB). Free memory was 85.6 MB in the beginning and 107.8 MB in the end (delta: -22.2 MB). Peak memory consumption was 36.9 MB. Max. memory is 16.1 GB. * Witness Printer took 89.12 ms. Allocated memory is still 182.5 MB. Free memory was 107.8 MB in the beginning and 105.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.8s, OverallIterations: 15, TraceHistogramMax: 10, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 215 SDtfs, 205 SDslu, 505 SDs, 0 SdLazy, 592 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 27 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 663 NumberOfCodeBlocks, 639 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 589 ConstructedInterpolants, 1 QuantifiedInterpolants, 56614 SizeOfPredicates, 10 NumberOfNonLiveVariables, 928 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 23 InterpolantComputations, 6 PerfectInterpolantSequences, 29/1097 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! Received shutdown request...