./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G --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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:56:25,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:56:25,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:56:25,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:56:25,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:56:25,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:56:25,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:56:25,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:56:25,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:56:25,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:56:25,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:56:25,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:56:25,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:56:25,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:56:25,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:56:25,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:56:25,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:56:25,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:56:25,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:56:26,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:56:26,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:56:26,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:56:26,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:56:26,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:56:26,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:56:26,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:56:26,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:56:26,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:56:26,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:56:26,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:56:26,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:56:26,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:56:26,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:56:26,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:56:26,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:56:26,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:56:26,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:56:26,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:56:26,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:56:26,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:56:26,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:56:26,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:56:26,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:56:26,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:56:26,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:56:26,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:56:26,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:56:26,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:56:26,075 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:56:26,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:56:26,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:56:26,075 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:56:26,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:56:26,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:56:26,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:56:26,076 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:56:26,076 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:56:26,077 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:56:26,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:56:26,077 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:56:26,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:56:26,077 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:56:26,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:56:26,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:56:26,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:56:26,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:56:26,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:56:26,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:56:26,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:56:26,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:56:26,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:56:26,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-11-23 13:56:26,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:56:26,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:56:26,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:56:26,388 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:56:26,390 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:56:26,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/list-properties/simple-2.i [2021-11-23 13:56:26,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data/c9791927c/dc2096aa1bd84258bf515901f9902f65/FLAG65295f7f9 [2021-11-23 13:56:27,013 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:56:27,014 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/sv-benchmarks/c/list-properties/simple-2.i [2021-11-23 13:56:27,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data/c9791927c/dc2096aa1bd84258bf515901f9902f65/FLAG65295f7f9 [2021-11-23 13:56:27,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data/c9791927c/dc2096aa1bd84258bf515901f9902f65 [2021-11-23 13:56:27,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:56:27,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:56:27,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:56:27,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:56:27,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:56:27,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:27,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611e1aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27, skipping insertion in model container [2021-11-23 13:56:27,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:27,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:56:27,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:56:27,826 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-11-23 13:56:27,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:56:27,842 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:56:27,914 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-11-23 13:56:27,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:56:27,962 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:56:27,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27 WrapperNode [2021-11-23 13:56:27,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:56:27,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:56:27,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:56:27,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:56:27,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,044 INFO L137 Inliner]: procedures = 124, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2021-11-23 13:56:28,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:56:28,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:56:28,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:56:28,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:56:28,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:56:28,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:56:28,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:56:28,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:56:28,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (1/1) ... [2021-11-23 13:56:28,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:56:28,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:28,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:56:28,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:56:28,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:56:28,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:56:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 13:56:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:56:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 13:56:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 13:56:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:56:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:56:28,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:56:28,289 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:56:28,291 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:56:28,522 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:56:28,529 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:56:28,529 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 13:56:28,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:28 BoogieIcfgContainer [2021-11-23 13:56:28,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:56:28,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:56:28,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:56:28,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:56:28,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:56:27" (1/3) ... [2021-11-23 13:56:28,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638a8f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:28, skipping insertion in model container [2021-11-23 13:56:28,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:27" (2/3) ... [2021-11-23 13:56:28,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638a8f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:28, skipping insertion in model container [2021-11-23 13:56:28,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:28" (3/3) ... [2021-11-23 13:56:28,540 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-11-23 13:56:28,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:56:28,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-23 13:56:28,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:56:28,600 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:56:28,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-23 13:56:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:56:28,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:28,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:56:28,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:28,643 INFO L85 PathProgramCache]: Analyzing trace with hash 889599944, now seen corresponding path program 1 times [2021-11-23 13:56:28,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:28,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744207133] [2021-11-23 13:56:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:28,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:28,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:28,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744207133] [2021-11-23 13:56:28,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744207133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:28,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:28,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:56:28,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375436581] [2021-11-23 13:56:28,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:28,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:56:28,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:56:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:56:28,851 INFO L87 Difference]: Start difference. First operand has 43 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:28,877 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-11-23 13:56:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:56:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:56:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:28,893 INFO L225 Difference]: With dead ends: 43 [2021-11-23 13:56:28,894 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 13:56:28,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:56:28,909 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:28,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:56:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 13:56:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 13:56:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-23 13:56:28,957 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 6 [2021-11-23 13:56:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:28,958 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-23 13:56:28,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-23 13:56:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:56:28,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:28,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:28,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:56:28,962 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1807769731, now seen corresponding path program 1 times [2021-11-23 13:56:28,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:28,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724459565] [2021-11-23 13:56:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:28,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:29,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:29,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724459565] [2021-11-23 13:56:29,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724459565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:29,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:29,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:29,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129751640] [2021-11-23 13:56:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:29,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:56:29,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:56:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:56:29,088 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:29,227 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-11-23 13:56:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:56:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 13:56:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:29,230 INFO L225 Difference]: With dead ends: 47 [2021-11-23 13:56:29,230 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 13:56:29,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:56:29,232 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:29,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:56:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 13:56:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-11-23 13:56:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-23 13:56:29,240 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2021-11-23 13:56:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:29,245 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-23 13:56:29,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-23 13:56:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:56:29,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:29,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:29,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:56:29,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1807769732, now seen corresponding path program 1 times [2021-11-23 13:56:29,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:29,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121132278] [2021-11-23 13:56:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:29,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:29,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:29,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121132278] [2021-11-23 13:56:29,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121132278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:29,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:29,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:56:29,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395587280] [2021-11-23 13:56:29,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:29,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:56:29,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:56:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:56:29,365 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:29,519 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-11-23 13:56:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:56:29,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 13:56:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:29,522 INFO L225 Difference]: With dead ends: 56 [2021-11-23 13:56:29,522 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 13:56:29,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:56:29,526 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:29,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 25 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:56:29,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 13:56:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-11-23 13:56:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-23 13:56:29,549 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 7 [2021-11-23 13:56:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:29,550 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-23 13:56:29,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-23 13:56:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:56:29,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:29,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:29,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:56:29,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1646105516, now seen corresponding path program 1 times [2021-11-23 13:56:29,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639974377] [2021-11-23 13:56:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:29,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:29,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:29,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639974377] [2021-11-23 13:56:29,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639974377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:29,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:29,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:56:29,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340247781] [2021-11-23 13:56:29,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:29,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:56:29,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:56:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:56:29,659 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:29,745 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-11-23 13:56:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:56:29,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 13:56:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:29,747 INFO L225 Difference]: With dead ends: 53 [2021-11-23 13:56:29,748 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 13:56:29,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:56:29,762 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:29,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:56:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 13:56:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-11-23 13:56:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-11-23 13:56:29,775 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2021-11-23 13:56:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:29,776 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-11-23 13:56:29,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-11-23 13:56:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:56:29,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:29,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:29,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:56:29,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash 510377448, now seen corresponding path program 1 times [2021-11-23 13:56:29,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:29,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057581568] [2021-11-23 13:56:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:29,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:29,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057581568] [2021-11-23 13:56:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057581568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:29,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:29,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:56:29,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494821124] [2021-11-23 13:56:29,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:56:29,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:56:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:56:29,932 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:30,068 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2021-11-23 13:56:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:56:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 13:56:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:30,070 INFO L225 Difference]: With dead ends: 85 [2021-11-23 13:56:30,070 INFO L226 Difference]: Without dead ends: 85 [2021-11-23 13:56:30,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:56:30,072 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:30,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 115 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:56:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-23 13:56:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2021-11-23 13:56:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.375) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-11-23 13:56:30,080 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 13 [2021-11-23 13:56:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:30,080 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-11-23 13:56:30,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-11-23 13:56:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:56:30,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:30,081 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:30,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:56:30,082 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2016970890, now seen corresponding path program 1 times [2021-11-23 13:56:30,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:30,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715779120] [2021-11-23 13:56:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:30,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:30,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:30,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715779120] [2021-11-23 13:56:30,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715779120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:30,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:30,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:56:30,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201670218] [2021-11-23 13:56:30,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:30,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:56:30,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:56:30,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:56:30,186 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:30,371 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-11-23 13:56:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:56:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 13:56:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:30,375 INFO L225 Difference]: With dead ends: 64 [2021-11-23 13:56:30,375 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 13:56:30,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:56:30,378 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:30,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:56:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 13:56:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2021-11-23 13:56:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.325) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-11-23 13:56:30,394 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 15 [2021-11-23 13:56:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:30,395 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-11-23 13:56:30,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-11-23 13:56:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:56:30,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:30,396 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:30,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:56:30,396 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2016970889, now seen corresponding path program 1 times [2021-11-23 13:56:30,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:30,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095333834] [2021-11-23 13:56:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:30,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:30,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:30,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095333834] [2021-11-23 13:56:30,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095333834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:30,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:30,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:56:30,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386448819] [2021-11-23 13:56:30,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:30,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:56:30,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:56:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:56:30,559 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:30,736 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-11-23 13:56:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:56:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 13:56:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:30,738 INFO L225 Difference]: With dead ends: 60 [2021-11-23 13:56:30,738 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 13:56:30,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:56:30,739 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:30,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 111 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:56:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 13:56:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2021-11-23 13:56:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-23 13:56:30,743 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2021-11-23 13:56:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:30,744 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-23 13:56:30,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-23 13:56:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:56:30,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:30,745 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:30,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:56:30,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash 475164067, now seen corresponding path program 1 times [2021-11-23 13:56:30,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:30,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270497103] [2021-11-23 13:56:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:30,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:30,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270497103] [2021-11-23 13:56:30,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270497103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:56:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381685155] [2021-11-23 13:56:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:30,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:30,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:30,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:56:30,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:56:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 13:56:30,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:31,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 13:56:31,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 13:56:31,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 13:56:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-23 13:56:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:31,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:31,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2021-11-23 13:56:31,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2021-11-23 13:56:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:31,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381685155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:56:31,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:56:31,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 16 [2021-11-23 13:56:31,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323357825] [2021-11-23 13:56:31,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:56:31,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 13:56:31,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 13:56:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:56:31,844 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:32,034 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-23 13:56:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:56:32,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 13:56:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:32,036 INFO L225 Difference]: With dead ends: 55 [2021-11-23 13:56:32,036 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 13:56:32,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:56:32,037 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 175 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:32,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 98 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 91 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2021-11-23 13:56:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 13:56:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-11-23 13:56:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-23 13:56:32,041 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 16 [2021-11-23 13:56:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:32,041 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-23 13:56:32,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-23 13:56:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:56:32,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:32,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:32,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:32,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:32,243 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:32,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1845182904, now seen corresponding path program 1 times [2021-11-23 13:56:32,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:32,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434113314] [2021-11-23 13:56:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:32,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:56:32,255 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 13:56:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:56:32,289 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 13:56:32,289 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 13:56:32,290 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2021-11-23 13:56:32,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (14 of 16 remaining) [2021-11-23 13:56:32,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (13 of 16 remaining) [2021-11-23 13:56:32,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (12 of 16 remaining) [2021-11-23 13:56:32,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (11 of 16 remaining) [2021-11-23 13:56:32,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (10 of 16 remaining) [2021-11-23 13:56:32,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 16 remaining) [2021-11-23 13:56:32,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (8 of 16 remaining) [2021-11-23 13:56:32,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (7 of 16 remaining) [2021-11-23 13:56:32,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (6 of 16 remaining) [2021-11-23 13:56:32,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (5 of 16 remaining) [2021-11-23 13:56:32,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (4 of 16 remaining) [2021-11-23 13:56:32,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (3 of 16 remaining) [2021-11-23 13:56:32,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2021-11-23 13:56:32,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (1 of 16 remaining) [2021-11-23 13:56:32,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (0 of 16 remaining) [2021-11-23 13:56:32,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:56:32,298 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:32,301 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:56:32,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:56:32 BoogieIcfgContainer [2021-11-23 13:56:32,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:56:32,330 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:56:32,330 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:56:32,330 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:56:32,331 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:28" (3/4) ... [2021-11-23 13:56:32,334 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 13:56:32,334 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:56:32,335 INFO L158 Benchmark]: Toolchain (without parser) took 5015.48ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 49.2MB in the beginning and 45.5MB in the end (delta: 3.7MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2021-11-23 13:56:32,335 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 88.1MB. Free memory is still 66.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:56:32,335 INFO L158 Benchmark]: CACSL2BoogieTranslator took 637.04ms. Allocated memory is still 88.1MB. Free memory was 49.0MB in the beginning and 57.6MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 13:56:32,336 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.03ms. Allocated memory is still 88.1MB. Free memory was 57.6MB in the beginning and 55.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:56:32,336 INFO L158 Benchmark]: Boogie Preprocessor took 59.33ms. Allocated memory is still 88.1MB. Free memory was 55.8MB in the beginning and 54.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:56:32,336 INFO L158 Benchmark]: RCFGBuilder took 425.81ms. Allocated memory is still 88.1MB. Free memory was 54.3MB in the beginning and 42.2MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 13:56:32,337 INFO L158 Benchmark]: TraceAbstraction took 3796.38ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 41.8MB in the beginning and 46.0MB in the end (delta: -4.2MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2021-11-23 13:56:32,337 INFO L158 Benchmark]: Witness Printer took 4.06ms. Allocated memory is still 107.0MB. Free memory is still 46.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:56:32,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 88.1MB. Free memory is still 66.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 637.04ms. Allocated memory is still 88.1MB. Free memory was 49.0MB in the beginning and 57.6MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.03ms. Allocated memory is still 88.1MB. Free memory was 57.6MB in the beginning and 55.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 59.33ms. Allocated memory is still 88.1MB. Free memory was 55.8MB in the beginning and 54.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 425.81ms. Allocated memory is still 88.1MB. Free memory was 54.3MB in the beginning and 42.2MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3796.38ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 41.8MB in the beginning and 46.0MB in the end (delta: -4.2MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. * Witness Printer took 4.06ms. Allocated memory is still 107.0MB. Free memory is still 46.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={-1:0}, p={-1:0}] [L544] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L545] p = a VAL [a={-1:0}, p={-1:0}] [L546] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L547] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 3.7s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 492 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 492 mSDsluCounter, 541 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 327 mSDsCounter, 79 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 558 IncrementalHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 79 mSolverCounterUnsat, 214 mSDtfsCounter, 558 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=5, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 113 ConstructedInterpolants, 1 QuantifiedInterpolants, 854 SizeOfPredicates, 10 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 7/10 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 could not prove your program: unable to determine feasibility of some traces [2021-11-23 13:56:32,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G --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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:56:35,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:56:35,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:56:35,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:56:35,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:56:35,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:56:35,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:56:35,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:56:35,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:56:35,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:56:35,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:56:35,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:56:35,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:56:35,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:56:35,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:56:35,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:56:35,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:56:35,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:56:35,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:56:35,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:56:35,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:56:35,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:56:35,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:56:35,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:56:35,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:56:35,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:56:35,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:56:35,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:56:35,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:56:35,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:56:35,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:56:35,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:56:35,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:56:35,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:56:35,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:56:35,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:56:35,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:56:35,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:56:35,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:56:35,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:56:35,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:56:35,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-23 13:56:35,250 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:56:35,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:56:35,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:56:35,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:56:35,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:56:35,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:56:35,254 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:56:35,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:56:35,255 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:56:35,255 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:56:35,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:56:35,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:56:35,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:56:35,257 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:56:35,257 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:56:35,257 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:56:35,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:56:35,258 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:56:35,258 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 13:56:35,259 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 13:56:35,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:56:35,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:56:35,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:56:35,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:56:35,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:56:35,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:56:35,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:56:35,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:56:35,261 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 13:56:35,261 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 13:56:35,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:56:35,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 13:56:35,262 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-11-23 13:56:35,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:56:35,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:56:35,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:56:35,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:56:35,703 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:56:35,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/list-properties/simple-2.i [2021-11-23 13:56:35,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data/bb7b61e36/666ed0467d194cb49ba296ad08139d2c/FLAG9335a2feb [2021-11-23 13:56:36,515 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:56:36,519 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/sv-benchmarks/c/list-properties/simple-2.i [2021-11-23 13:56:36,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data/bb7b61e36/666ed0467d194cb49ba296ad08139d2c/FLAG9335a2feb [2021-11-23 13:56:36,762 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/data/bb7b61e36/666ed0467d194cb49ba296ad08139d2c [2021-11-23 13:56:36,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:56:36,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:56:36,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:56:36,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:56:36,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:56:36,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:36" (1/1) ... [2021-11-23 13:56:36,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e7f12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:36, skipping insertion in model container [2021-11-23 13:56:36,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:36" (1/1) ... [2021-11-23 13:56:36,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:56:36,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:56:37,258 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-11-23 13:56:37,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:56:37,276 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:56:37,321 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-11-23 13:56:37,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:56:37,375 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:56:37,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37 WrapperNode [2021-11-23 13:56:37,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:56:37,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:56:37,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:56:37,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:56:37,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,462 INFO L137 Inliner]: procedures = 127, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2021-11-23 13:56:37,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:56:37,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:56:37,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:56:37,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:56:37,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:56:37,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:56:37,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:56:37,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:56:37,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (1/1) ... [2021-11-23 13:56:37,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:56:37,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:37,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:56:37,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:56:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 13:56:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 13:56:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:56:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 13:56:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 13:56:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 13:56:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 13:56:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:56:37,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:56:37,803 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:56:37,806 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:56:38,135 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:56:38,142 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:56:38,143 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 13:56:38,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:38 BoogieIcfgContainer [2021-11-23 13:56:38,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:56:38,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:56:38,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:56:38,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:56:38,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:56:36" (1/3) ... [2021-11-23 13:56:38,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1248e780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:38, skipping insertion in model container [2021-11-23 13:56:38,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:37" (2/3) ... [2021-11-23 13:56:38,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1248e780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:38, skipping insertion in model container [2021-11-23 13:56:38,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:38" (3/3) ... [2021-11-23 13:56:38,155 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-11-23 13:56:38,160 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:56:38,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-23 13:56:38,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:56:38,237 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:56:38,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-23 13:56:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 25 states have (on average 1.92) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:56:38,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:38,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:56:38,273 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash 889599230, now seen corresponding path program 1 times [2021-11-23 13:56:38,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:56:38,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646145260] [2021-11-23 13:56:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:38,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:56:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:56:38,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:56:38,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 13:56:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:38,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:56:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:38,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:56:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:38,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:38,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:56:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646145260] [2021-11-23 13:56:38,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646145260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:38,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:38,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 13:56:38,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388969072] [2021-11-23 13:56:38,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:38,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:56:38,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:56:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:56:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:56:38,589 INFO L87 Difference]: Start difference. First operand has 42 states, 25 states have (on average 1.92) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:38,852 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-23 13:56:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:56:38,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:56:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:38,868 INFO L225 Difference]: With dead ends: 51 [2021-11-23 13:56:38,869 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 13:56:38,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:56:38,879 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:38,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:56:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 13:56:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-11-23 13:56:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-23 13:56:38,934 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 6 [2021-11-23 13:56:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:38,935 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-23 13:56:38,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-23 13:56:38,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:56:38,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:38,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:56:38,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:39,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:56:39,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash 889599231, now seen corresponding path program 1 times [2021-11-23 13:56:39,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:56:39,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868441899] [2021-11-23 13:56:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:39,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:56:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:56:39,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:56:39,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 13:56:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:39,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:56:39,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:39,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:56:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:39,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:39,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:56:39,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868441899] [2021-11-23 13:56:39,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868441899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:39,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:39,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 13:56:39,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368448378] [2021-11-23 13:56:39,606 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:39,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:56:39,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:56:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:56:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:56:39,613 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:40,096 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-11-23 13:56:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:56:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:56:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:40,100 INFO L225 Difference]: With dead ends: 54 [2021-11-23 13:56:40,101 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 13:56:40,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:56:40,103 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:40,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 23 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:56:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 13:56:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-11-23 13:56:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-23 13:56:40,111 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 6 [2021-11-23 13:56:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:40,111 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-23 13:56:40,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-23 13:56:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:56:40,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:40,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:40,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:40,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:56:40,324 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1828101368, now seen corresponding path program 1 times [2021-11-23 13:56:40,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:56:40,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173357392] [2021-11-23 13:56:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:40,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:56:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:56:40,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:56:40,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 13:56:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:56:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:40,485 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:56:40,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173357392] [2021-11-23 13:56:40,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173357392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:40,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:40,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 13:56:40,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730561123] [2021-11-23 13:56:40,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:40,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:56:40,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:56:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:56:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:56:40,489 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:40,635 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-23 13:56:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:56:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 13:56:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:40,638 INFO L225 Difference]: With dead ends: 51 [2021-11-23 13:56:40,638 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 13:56:40,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:56:40,640 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:40,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:56:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 13:56:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-11-23 13:56:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-11-23 13:56:40,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 11 [2021-11-23 13:56:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:40,648 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-11-23 13:56:40,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-11-23 13:56:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:56:40,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:40,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:40,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:40,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:56:40,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash 836608451, now seen corresponding path program 1 times [2021-11-23 13:56:40,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:56:40,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382475319] [2021-11-23 13:56:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:40,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:56:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:56:40,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:56:40,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 13:56:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:40,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:56:40,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:41,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 13:56:41,063 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 13:56:41,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 13:56:41,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 13:56:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:41,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:41,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 156 [2021-11-23 13:56:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:41,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:56:41,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382475319] [2021-11-23 13:56:41,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382475319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:41,516 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:41,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-23 13:56:41,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232521248] [2021-11-23 13:56:41,516 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:41,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:56:41,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:56:41,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:56:41,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:56:41,520 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:41,793 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-11-23 13:56:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:56:41,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 13:56:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:41,796 INFO L225 Difference]: With dead ends: 56 [2021-11-23 13:56:41,796 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 13:56:41,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:56:41,797 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:41,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 90 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2021-11-23 13:56:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 13:56:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-11-23 13:56:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.394736842105263) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-11-23 13:56:41,809 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 12 [2021-11-23 13:56:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:41,810 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-11-23 13:56:41,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-11-23 13:56:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:56:41,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:41,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:41,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:42,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:56:42,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:42,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash 903973711, now seen corresponding path program 1 times [2021-11-23 13:56:42,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:56:42,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461951514] [2021-11-23 13:56:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:42,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:56:42,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:56:42,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:56:42,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 13:56:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:56:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:42,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:56:42,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 13:56:42,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 13:56:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:42,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:42,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:56:42,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461951514] [2021-11-23 13:56:42,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461951514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:42,239 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:42,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 13:56:42,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984278517] [2021-11-23 13:56:42,240 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:42,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:56:42,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:56:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:56:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:56:42,241 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:42,611 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-23 13:56:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:56:42,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 13:56:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:42,613 INFO L225 Difference]: With dead ends: 62 [2021-11-23 13:56:42,613 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 13:56:42,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:56:42,614 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:42,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 85 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:56:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 13:56:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-11-23 13:56:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-11-23 13:56:42,625 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 13 [2021-11-23 13:56:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:42,625 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-11-23 13:56:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-11-23 13:56:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:56:42,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:42,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:42,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:42,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:56:42,839 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 903973712, now seen corresponding path program 1 times [2021-11-23 13:56:42,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:56:42,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988161929] [2021-11-23 13:56:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:42,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:56:42,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:56:42,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:56:42,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 13:56:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:42,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:56:42,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:42,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:56:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 13:56:42,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 13:56:42,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 13:56:43,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-23 13:56:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:43,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:43,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:56:43,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988161929] [2021-11-23 13:56:43,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988161929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:56:43,373 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:56:43,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 13:56:43,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301775735] [2021-11-23 13:56:43,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:56:43,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:56:43,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:56:43,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:56:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:56:43,376 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:44,445 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-11-23 13:56:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:56:44,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 13:56:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:44,447 INFO L225 Difference]: With dead ends: 58 [2021-11-23 13:56:44,447 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 13:56:44,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:56:44,448 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 56 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:44,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 147 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 13:56:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 13:56:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2021-11-23 13:56:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-11-23 13:56:44,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2021-11-23 13:56:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:44,453 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-11-23 13:56:44,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-11-23 13:56:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:56:44,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:44,455 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:44,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:44,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:56:44,665 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash -288017401, now seen corresponding path program 1 times [2021-11-23 13:56:44,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:56:44,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644742423] [2021-11-23 13:56:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:44,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:56:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:56:44,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:56:44,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 13:56:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:44,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:56:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:44,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 13:56:44,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 13:56:44,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-23 13:56:44,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-23 13:56:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:44,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:45,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-11-23 13:56:45,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:56:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:56:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:45,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:56:45,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644742423] [2021-11-23 13:56:45,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644742423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:56:45,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:56:45,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-23 13:56:45,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504857262] [2021-11-23 13:56:45,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:56:45,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:56:45,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:56:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:56:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:56:45,052 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:46,999 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-11-23 13:56:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:56:47,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 13:56:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:47,002 INFO L225 Difference]: With dead ends: 53 [2021-11-23 13:56:47,003 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 13:56:47,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:56:47,004 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:47,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 79 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 13:56:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 13:56:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-11-23 13:56:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-23 13:56:47,009 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-11-23 13:56:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:47,010 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-23 13:56:47,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-23 13:56:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:56:47,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:47,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:47,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:47,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:56:47,223 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-23 13:56:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash -338606125, now seen corresponding path program 1 times [2021-11-23 13:56:47,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:56:47,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568169482] [2021-11-23 13:56:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:47,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:56:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:56:47,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:56:47,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 13:56:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:56:47,277 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 13:56:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:56:47,340 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-23 13:56:47,340 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 13:56:47,341 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2021-11-23 13:56:47,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (14 of 16 remaining) [2021-11-23 13:56:47,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (13 of 16 remaining) [2021-11-23 13:56:47,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (12 of 16 remaining) [2021-11-23 13:56:47,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (11 of 16 remaining) [2021-11-23 13:56:47,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (10 of 16 remaining) [2021-11-23 13:56:47,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 16 remaining) [2021-11-23 13:56:47,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (8 of 16 remaining) [2021-11-23 13:56:47,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (7 of 16 remaining) [2021-11-23 13:56:47,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (6 of 16 remaining) [2021-11-23 13:56:47,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (5 of 16 remaining) [2021-11-23 13:56:47,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (4 of 16 remaining) [2021-11-23 13:56:47,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (3 of 16 remaining) [2021-11-23 13:56:47,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2021-11-23 13:56:47,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (1 of 16 remaining) [2021-11-23 13:56:47,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (0 of 16 remaining) [2021-11-23 13:56:47,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:47,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:56:47,551 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:47,554 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:56:47,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:56:47 BoogieIcfgContainer [2021-11-23 13:56:47,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:56:47,587 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:56:47,587 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:56:47,587 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:56:47,588 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:38" (3/4) ... [2021-11-23 13:56:47,591 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 13:56:47,591 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:56:47,592 INFO L158 Benchmark]: Toolchain (without parser) took 10822.90ms. Allocated memory was 77.6MB in the beginning and 100.7MB in the end (delta: 23.1MB). Free memory was 62.5MB in the beginning and 53.4MB in the end (delta: 9.1MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2021-11-23 13:56:47,593 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 77.6MB. Free memory is still 58.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:56:47,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 606.44ms. Allocated memory is still 77.6MB. Free memory was 62.4MB in the beginning and 54.2MB in the end (delta: 8.1MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. [2021-11-23 13:56:47,594 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.86ms. Allocated memory is still 77.6MB. Free memory was 54.2MB in the beginning and 52.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:56:47,594 INFO L158 Benchmark]: Boogie Preprocessor took 35.05ms. Allocated memory is still 77.6MB. Free memory was 52.3MB in the beginning and 50.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:56:47,595 INFO L158 Benchmark]: RCFGBuilder took 645.65ms. Allocated memory is still 77.6MB. Free memory was 50.6MB in the beginning and 37.7MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 13:56:47,595 INFO L158 Benchmark]: TraceAbstraction took 9438.87ms. Allocated memory was 77.6MB in the beginning and 100.7MB in the end (delta: 23.1MB). Free memory was 37.3MB in the beginning and 53.4MB in the end (delta: -16.2MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2021-11-23 13:56:47,595 INFO L158 Benchmark]: Witness Printer took 4.88ms. Allocated memory is still 100.7MB. Free memory is still 53.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:56:47,605 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 77.6MB. Free memory is still 58.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 606.44ms. Allocated memory is still 77.6MB. Free memory was 62.4MB in the beginning and 54.2MB in the end (delta: 8.1MB). Peak memory consumption was 11.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.86ms. Allocated memory is still 77.6MB. Free memory was 54.2MB in the beginning and 52.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.05ms. Allocated memory is still 77.6MB. Free memory was 52.3MB in the beginning and 50.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 645.65ms. Allocated memory is still 77.6MB. Free memory was 50.6MB in the beginning and 37.7MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9438.87ms. Allocated memory was 77.6MB in the beginning and 100.7MB in the end (delta: 23.1MB). Free memory was 37.3MB in the beginning and 53.4MB in the end (delta: -16.2MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Witness Printer took 4.88ms. Allocated memory is still 100.7MB. Free memory is still 53.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={6:0}] [L534] List t; [L535] List p = a; VAL [a={6:0}, p={6:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={6:0}, p={6:0}] [L544] p->n = 0 VAL [a={6:0}, p={6:0}] [L545] p = a VAL [a={6:0}, p={6:0}] [L546] COND TRUE p!=0 VAL [a={6:0}, p={6:0}] [L547] EXPR p->h VAL [a={6:0}, p={6:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={6:0}, p={6:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={6:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={6:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 9.3s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 383 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 383 mSDsluCounter, 479 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 29 IncrementalHoareTripleChecker+Unchecked, 321 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 586 IncrementalHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 158 mSDtfsCounter, 586 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 71 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 138 ConstructedInterpolants, 1 QuantifiedInterpolants, 918 SizeOfPredicates, 32 NumberOfNonLiveVariables, 309 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 6/8 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 could not prove your program: unable to determine feasibility of some traces [2021-11-23 13:56:47,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d966c5a-ee57-4838-bed1-719ea1c63a55/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample