./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes3.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_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/scopes3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 7efcb16e512d7de15a71f6cd895dcd8493c4b646 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:56:49,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:56:49,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:56:49,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:56:49,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:56:49,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:56:49,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:56:49,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:56:49,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:56:49,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:56:49,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:56:49,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:56:49,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:56:49,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:56:49,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:56:49,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:56:49,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:56:49,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:56:49,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:56:49,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:56:49,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:56:49,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:56:49,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:56:49,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:56:49,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:56:49,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:56:49,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:56:49,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:56:49,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:56:49,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:56:49,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:56:49,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:56:49,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:56:49,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:56:49,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:56:49,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:56:49,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:56:49,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:56:49,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:56:49,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:56:49,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:56:49,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 02:56:49,993 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:56:49,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:56:49,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:56:49,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:56:49,995 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:56:49,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:56:49,996 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:56:49,996 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 02:56:49,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:56:49,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:56:49,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:56:49,997 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 02:56:49,997 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 02:56:49,997 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 02:56:49,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:56:49,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 02:56:49,998 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:56:49,998 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:56:49,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:56:49,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:56:49,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:56:49,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:56:49,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:56:49,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:56:50,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:56:50,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:56:50,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:56:50,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:56:50,000 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_0aa33c4a-de83-494a-805c-83198bbe2106/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2020-11-28 02:56:50,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:56:50,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:56:50,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:56:50,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:56:50,355 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:56:50,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes3.c [2020-11-28 02:56:50,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/data/09c58af72/b29b188306024dfa93d7aa9e22c8bfda/FLAG1a0ef4c60 [2020-11-28 02:56:50,983 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:56:50,983 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/sv-benchmarks/c/memsafety-ext3/scopes3.c [2020-11-28 02:56:50,989 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/data/09c58af72/b29b188306024dfa93d7aa9e22c8bfda/FLAG1a0ef4c60 [2020-11-28 02:56:51,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/data/09c58af72/b29b188306024dfa93d7aa9e22c8bfda [2020-11-28 02:56:51,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:56:51,363 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 02:56:51,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:56:51,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:56:51,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:56:51,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac63c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51, skipping insertion in model container [2020-11-28 02:56:51,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:56:51,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:56:51,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:56:51,676 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:56:51,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:56:51,705 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:56:51,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51 WrapperNode [2020-11-28 02:56:51,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:56:51,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:56:51,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:56:51,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:56:51,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (1/1) ... [2020-11-28 02:56:51,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:56:51,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:56:51,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:56:51,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:56:51,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:51,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 02:56:51,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:56:51,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 02:56:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 02:56:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:56:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 02:56:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:56:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 02:56:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:56:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:56:52,176 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:56:52,176 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-28 02:56:52,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:52 BoogieIcfgContainer [2020-11-28 02:56:52,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:56:52,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:56:52,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:56:52,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:56:52,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:56:51" (1/3) ... [2020-11-28 02:56:52,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a680cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:56:52, skipping insertion in model container [2020-11-28 02:56:52,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:51" (2/3) ... [2020-11-28 02:56:52,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a680cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:56:52, skipping insertion in model container [2020-11-28 02:56:52,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:52" (3/3) ... [2020-11-28 02:56:52,188 INFO L111 eAbstractionObserver]: Analyzing ICFG scopes3.c [2020-11-28 02:56:52,199 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:56:52,202 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-28 02:56:52,213 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-28 02:56:52,241 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:56:52,241 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 02:56:52,242 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:56:52,242 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:56:52,242 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:56:52,242 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:56:52,242 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:56:52,242 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:56:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-28 02:56:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:56:52,272 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:52,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:52,273 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:52,283 INFO L82 PathProgramCache]: Analyzing trace with hash -197094901, now seen corresponding path program 1 times [2020-11-28 02:56:52,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:52,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672548336] [2020-11-28 02:56:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:52,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:52,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672548336] [2020-11-28 02:56:52,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:52,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:56:52,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735615354] [2020-11-28 02:56:52,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:56:52,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:52,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:56:52,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:56:52,562 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-11-28 02:56:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:52,691 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-11-28 02:56:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:56:52,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-28 02:56:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:52,702 INFO L225 Difference]: With dead ends: 26 [2020-11-28 02:56:52,703 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 02:56:52,705 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 [2020-11-28 02:56:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 02:56:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-11-28 02:56:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 02:56:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-28 02:56:52,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2020-11-28 02:56:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:52,760 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-28 02:56:52,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:56:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-28 02:56:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:56:52,764 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:52,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:52,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:56:52,765 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash -197095180, now seen corresponding path program 1 times [2020-11-28 02:56:52,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:52,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323139843] [2020-11-28 02:56:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:52,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:52,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323139843] [2020-11-28 02:56:52,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:52,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:56:52,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167694533] [2020-11-28 02:56:52,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:56:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:56:52,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:56:52,899 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-11-28 02:56:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:52,970 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-28 02:56:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:56:52,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 02:56:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:52,972 INFO L225 Difference]: With dead ends: 22 [2020-11-28 02:56:52,972 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 02:56:52,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:56:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 02:56:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-11-28 02:56:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 02:56:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-28 02:56:52,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2020-11-28 02:56:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:52,978 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-28 02:56:52,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:56:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-28 02:56:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:56:52,978 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:52,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:52,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:56:52,979 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash -197095125, now seen corresponding path program 1 times [2020-11-28 02:56:52,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:52,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713890685] [2020-11-28 02:56:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:53,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:53,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713890685] [2020-11-28 02:56:53,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:53,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:56:53,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19014307] [2020-11-28 02:56:53,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:56:53,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:53,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:56:53,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:56:53,107 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 4 states. [2020-11-28 02:56:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:53,220 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-28 02:56:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:56:53,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 02:56:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:53,223 INFO L225 Difference]: With dead ends: 16 [2020-11-28 02:56:53,223 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 02:56:53,224 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 [2020-11-28 02:56:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 02:56:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 02:56:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 02:56:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-28 02:56:53,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2020-11-28 02:56:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:53,229 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-28 02:56:53,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:56:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-28 02:56:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:56:53,230 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:53,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:53,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:56:53,230 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -197095126, now seen corresponding path program 1 times [2020-11-28 02:56:53,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:53,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307442626] [2020-11-28 02:56:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:53,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:53,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307442626] [2020-11-28 02:56:53,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:53,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:56:53,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478343684] [2020-11-28 02:56:53,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:56:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:56:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:56:53,318 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2020-11-28 02:56:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:53,354 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-28 02:56:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:56:53,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 02:56:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:53,356 INFO L225 Difference]: With dead ends: 15 [2020-11-28 02:56:53,356 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 02:56:53,357 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 [2020-11-28 02:56:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 02:56:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 02:56:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 02:56:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-28 02:56:53,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2020-11-28 02:56:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:53,361 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-28 02:56:53,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:56:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-28 02:56:53,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 02:56:53,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:53,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:53,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 02:56:53,363 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash -440617163, now seen corresponding path program 1 times [2020-11-28 02:56:53,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:53,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756641397] [2020-11-28 02:56:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:53,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:53,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756641397] [2020-11-28 02:56:53,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163913577] [2020-11-28 02:56:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:53,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:56:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:53,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:53,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-28 02:56:53,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101998260] [2020-11-28 02:56:53,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:56:53,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:53,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:56:53,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:56:53,605 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-11-28 02:56:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:53,667 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-28 02:56:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:56:53,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-28 02:56:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:53,669 INFO L225 Difference]: With dead ends: 20 [2020-11-28 02:56:53,669 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 02:56:53,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:56:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 02:56:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-28 02:56:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 02:56:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-28 02:56:53,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2020-11-28 02:56:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:53,673 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-28 02:56:53,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:56:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-28 02:56:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 02:56:53,674 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:53,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:53,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:53,884 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1004249772, now seen corresponding path program 2 times [2020-11-28 02:56:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:53,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466363940] [2020-11-28 02:56:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:54,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:54,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466363940] [2020-11-28 02:56:54,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054618659] [2020-11-28 02:56:54,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:54,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:56:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:56:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:56:54,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:54,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:54,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-28 02:56:54,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740409185] [2020-11-28 02:56:54,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:56:54,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:54,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:56:54,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:56:54,121 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-11-28 02:56:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:54,179 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-28 02:56:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:56:54,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-28 02:56:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:54,184 INFO L225 Difference]: With dead ends: 23 [2020-11-28 02:56:54,184 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 02:56:54,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:56:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 02:56:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-11-28 02:56:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 02:56:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-11-28 02:56:54,188 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-11-28 02:56:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:54,188 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-11-28 02:56:54,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:56:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-11-28 02:56:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 02:56:54,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:54,189 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:54,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:54,400 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1138822869, now seen corresponding path program 3 times [2020-11-28 02:56:54,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:54,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381686771] [2020-11-28 02:56:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:54,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:54,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381686771] [2020-11-28 02:56:54,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559890259] [2020-11-28 02:56:54,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:54,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 02:56:54,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:56:54,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:56:54,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:54,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:54,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-28 02:56:54,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420353779] [2020-11-28 02:56:54,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:56:54,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:56:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:56:54,603 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-11-28 02:56:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:54,671 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-11-28 02:56:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:56:54,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-28 02:56:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:54,672 INFO L225 Difference]: With dead ends: 26 [2020-11-28 02:56:54,673 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 02:56:54,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:56:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 02:56:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-28 02:56:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 02:56:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-28 02:56:54,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2020-11-28 02:56:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:54,677 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-28 02:56:54,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:56:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-28 02:56:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:56:54,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:54,678 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:54,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:54,879 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:54,880 INFO L82 PathProgramCache]: Analyzing trace with hash 727015860, now seen corresponding path program 4 times [2020-11-28 02:56:54,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:54,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331184003] [2020-11-28 02:56:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:55,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331184003] [2020-11-28 02:56:55,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694663085] [2020-11-28 02:56:55,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:55,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 02:56:55,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:56:55,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:56:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:55,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:55,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-28 02:56:55,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119092649] [2020-11-28 02:56:55,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:56:55,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:56:55,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:56:55,123 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-11-28 02:56:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:55,208 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-11-28 02:56:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:56:55,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-28 02:56:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:55,209 INFO L225 Difference]: With dead ends: 29 [2020-11-28 02:56:55,210 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 02:56:55,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:56:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 02:56:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-28 02:56:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 02:56:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-28 02:56:55,215 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2020-11-28 02:56:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:55,215 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-28 02:56:55,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:56:55,216 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-28 02:56:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 02:56:55,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:55,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:55,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:55,444 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:55,445 INFO L82 PathProgramCache]: Analyzing trace with hash -988991883, now seen corresponding path program 5 times [2020-11-28 02:56:55,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:55,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806904223] [2020-11-28 02:56:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:55,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:55,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806904223] [2020-11-28 02:56:55,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737517839] [2020-11-28 02:56:55,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:55,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-28 02:56:55,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:56:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:56:55,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:55,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:55,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-28 02:56:55,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884255559] [2020-11-28 02:56:55,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 02:56:55,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:55,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:56:55,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:56:55,752 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2020-11-28 02:56:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:55,826 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-11-28 02:56:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:56:55,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-28 02:56:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:55,828 INFO L225 Difference]: With dead ends: 32 [2020-11-28 02:56:55,828 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 02:56:55,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:56:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 02:56:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-11-28 02:56:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 02:56:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-11-28 02:56:55,833 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2020-11-28 02:56:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:55,833 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-11-28 02:56:55,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 02:56:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-11-28 02:56:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 02:56:55,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:55,834 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:56,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:56,056 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash 420060692, now seen corresponding path program 6 times [2020-11-28 02:56:56,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:56,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272393869] [2020-11-28 02:56:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:56,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272393869] [2020-11-28 02:56:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486695417] [2020-11-28 02:56:56,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:56,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-28 02:56:56,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:56:56,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:56:56,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:56,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:56,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-28 02:56:56,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117579492] [2020-11-28 02:56:56,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 02:56:56,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:56:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:56:56,466 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2020-11-28 02:56:56,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:56,567 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-11-28 02:56:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 02:56:56,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-11-28 02:56:56,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:56,568 INFO L225 Difference]: With dead ends: 35 [2020-11-28 02:56:56,568 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 02:56:56,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:56:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 02:56:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-11-28 02:56:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 02:56:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-11-28 02:56:56,572 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 26 [2020-11-28 02:56:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:56,573 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-11-28 02:56:56,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 02:56:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-11-28 02:56:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 02:56:56,574 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:56,574 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:56,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:56,796 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1505028587, now seen corresponding path program 7 times [2020-11-28 02:56:56,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:56,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094582641] [2020-11-28 02:56:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:56,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:56,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094582641] [2020-11-28 02:56:56,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131794803] [2020-11-28 02:56:56,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:57,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 02:56:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:57,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:57,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-28 02:56:57,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516616679] [2020-11-28 02:56:57,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 02:56:57,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:57,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 02:56:57,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:56:57,122 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 12 states. [2020-11-28 02:56:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:57,232 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-11-28 02:56:57,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 02:56:57,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-11-28 02:56:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:57,233 INFO L225 Difference]: With dead ends: 38 [2020-11-28 02:56:57,233 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 02:56:57,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-11-28 02:56:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 02:56:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-11-28 02:56:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 02:56:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-11-28 02:56:57,238 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2020-11-28 02:56:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:57,239 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-11-28 02:56:57,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 02:56:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-11-28 02:56:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 02:56:57,245 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:57,245 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:57,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:57,456 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:57,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1141435788, now seen corresponding path program 8 times [2020-11-28 02:56:57,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:57,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062556263] [2020-11-28 02:56:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:57,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:57,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062556263] [2020-11-28 02:56:57,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205329846] [2020-11-28 02:56:57,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:57,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:56:57,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:56:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 02:56:57,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:57,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:57,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-28 02:56:57,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55313763] [2020-11-28 02:56:57,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 02:56:57,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 02:56:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-28 02:56:57,815 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 13 states. [2020-11-28 02:56:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:57,916 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-11-28 02:56:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 02:56:57,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-11-28 02:56:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:57,918 INFO L225 Difference]: With dead ends: 41 [2020-11-28 02:56:57,918 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 02:56:57,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:56:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 02:56:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-28 02:56:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 02:56:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-11-28 02:56:57,929 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2020-11-28 02:56:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:57,932 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-11-28 02:56:57,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 02:56:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-11-28 02:56:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-28 02:56:57,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:57,934 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:58,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 02:56:58,135 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1255881291, now seen corresponding path program 9 times [2020-11-28 02:56:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:58,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582869] [2020-11-28 02:56:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:58,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:56:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582869] [2020-11-28 02:56:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920465461] [2020-11-28 02:56:58,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/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 [2020-11-28 02:56:58,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-28 02:56:58,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:56:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 02:56:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:58,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:58,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-11-28 02:56:58,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398856058] [2020-11-28 02:56:58,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 02:56:58,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:58,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 02:56:58,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:56:58,533 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 14 states. [2020-11-28 02:56:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:58,625 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-11-28 02:56:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 02:56:58,626 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-11-28 02:56:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:58,627 INFO L225 Difference]: With dead ends: 42 [2020-11-28 02:56:58,627 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 02:56:58,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-11-28 02:56:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 02:56:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-28 02:56:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 02:56:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-11-28 02:56:58,631 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 35 [2020-11-28 02:56:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:58,632 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-11-28 02:56:58,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 02:56:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-11-28 02:56:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-28 02:56:58,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:58,636 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:58,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:58,852 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 02:56:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash -497828140, now seen corresponding path program 10 times [2020-11-28 02:56:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:58,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338390795] [2020-11-28 02:56:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:56:58,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:56:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:56:58,929 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:56:58,961 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:56:58,962 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:56:58,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 02:56:59,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:56:59 BoogieIcfgContainer [2020-11-28 02:56:59,018 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:56:59,020 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:56:59,021 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:56:59,021 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:56:59,021 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:52" (3/4) ... [2020-11-28 02:56:59,023 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:56:59,092 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0aa33c4a-de83-494a-805c-83198bbe2106/bin/uautomizer/witness.graphml [2020-11-28 02:56:59,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:56:59,098 INFO L168 Benchmark]: Toolchain (without parser) took 7729.72 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 77.0 MB in the beginning and 45.4 MB in the end (delta: 31.6 MB). Peak memory consumption was 56.3 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:59,098 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 79.7 MB. Free memory was 39.8 MB in the beginning and 39.8 MB in the end (delta: 40.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:56:59,099 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.98 ms. Allocated memory is still 104.9 MB. Free memory was 76.7 MB in the beginning and 84.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:59,099 INFO L168 Benchmark]: Boogie Preprocessor took 47.10 ms. Allocated memory is still 104.9 MB. Free memory was 84.8 MB in the beginning and 83.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:56:59,099 INFO L168 Benchmark]: RCFGBuilder took 420.51 ms. Allocated memory is still 104.9 MB. Free memory was 83.1 MB in the beginning and 72.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:59,100 INFO L168 Benchmark]: TraceAbstraction took 6840.72 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 71.8 MB in the beginning and 47.5 MB in the end (delta: 24.4 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:59,100 INFO L168 Benchmark]: Witness Printer took 71.49 ms. Allocated memory is still 130.0 MB. Free memory was 47.5 MB in the beginning and 45.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:59,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 79.7 MB. Free memory was 39.8 MB in the beginning and 39.8 MB in the end (delta: 40.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.98 ms. Allocated memory is still 104.9 MB. Free memory was 76.7 MB in the beginning and 84.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.10 ms. Allocated memory is still 104.9 MB. Free memory was 84.8 MB in the beginning and 83.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 420.51 ms. Allocated memory is still 104.9 MB. Free memory was 83.1 MB in the beginning and 72.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6840.72 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 71.8 MB in the beginning and 47.5 MB in the end (delta: 24.4 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.1 GB. * Witness Printer took 71.49 ms. Allocated memory is still 130.0 MB. Free memory was 47.5 MB in the beginning and 45.4 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: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=0, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=0, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={4:0}, i=1, p={4:0}] [L6] p[0] = 1 VAL [a={4:0}, i=1, p={4:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={5:0}, i=2, p={5:0}] [L6] p[0] = 1 VAL [a={5:0}, i=2, p={5:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={6:0}, i=3, p={6:0}] [L6] p[0] = 1 VAL [a={6:0}, i=3, p={6:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={7:0}, i=4, p={7:0}] [L6] p[0] = 1 VAL [a={7:0}, i=4, p={7:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={8:0}, i=5, p={8:0}] [L6] p[0] = 1 VAL [a={8:0}, i=5, p={8:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={9:0}, i=6, p={9:0}] [L6] p[0] = 1 VAL [a={9:0}, i=6, p={9:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={10:0}, i=7, p={10:0}] [L6] p[0] = 1 VAL [a={10:0}, i=7, p={10:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={11:0}, i=8, p={11:0}] [L6] p[0] = 1 VAL [a={11:0}, i=8, p={11:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={2:0}, i=9, p={2:0}] [L6] p[0] = 1 VAL [a={2:0}, i=9, p={2:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={2:0}] [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 132 SDslu, 533 SDs, 0 SdLazy, 398 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, 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, 13 MinimizatonAttempts, 22 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 484 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 26952 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1181 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/810 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...