./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8 --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 10a3b461143c2c5d394f7bd34cd6fefed4195b79a5252178f7ede404a303cf96 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:31:19,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:31:19,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:31:19,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:31:19,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:31:19,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:31:19,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:31:19,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:31:19,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:31:19,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:31:19,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:31:19,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:31:19,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:31:19,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:31:19,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:31:19,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:31:19,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:31:19,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:31:19,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:31:19,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:31:19,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:31:19,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:31:19,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:31:19,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:31:19,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:31:19,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:31:19,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:31:19,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:31:19,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:31:19,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:31:19,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:31:19,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:31:19,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:31:19,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:31:19,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:31:19,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:31:19,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:31:19,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:31:19,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:31:19,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:31:19,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:31:19,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:31:19,354 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:31:19,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:31:19,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:31:19,355 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:31:19,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:31:19,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:31:19,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:31:19,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:31:19,358 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:31:19,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:31:19,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:31:19,359 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:31:19,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:31:19,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:31:19,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:31:19,359 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:31:19,360 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:31:19,360 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:31:19,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:31:19,360 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:31:19,361 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:31:19,361 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:31:19,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:31:19,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:31:19,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:31:19,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:31:19,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:31:19,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:31:19,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:31:19,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:31:19,363 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_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10a3b461143c2c5d394f7bd34cd6fefed4195b79a5252178f7ede404a303cf96 [2022-11-16 11:31:19,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:31:19,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:31:19,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:31:19,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:31:19,670 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:31:19,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2022-11-16 11:31:19,743 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/data/8bd26b130/6510a9c470c64e35bcde23f239758ea1/FLAG6f2632678 [2022-11-16 11:31:20,250 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:31:20,251 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2022-11-16 11:31:20,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/data/8bd26b130/6510a9c470c64e35bcde23f239758ea1/FLAG6f2632678 [2022-11-16 11:31:20,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/data/8bd26b130/6510a9c470c64e35bcde23f239758ea1 [2022-11-16 11:31:20,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:31:20,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:31:20,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:31:20,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:31:20,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:31:20,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:31:20" (1/1) ... [2022-11-16 11:31:20,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@352f4590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:20, skipping insertion in model container [2022-11-16 11:31:20,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:31:20" (1/1) ... [2022-11-16 11:31:20,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:31:20,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:31:21,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:31:21,038 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:31:21,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:31:21,125 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:31:21,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21 WrapperNode [2022-11-16 11:31:21,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:31:21,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:31:21,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:31:21,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:31:21,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,183 INFO L138 Inliner]: procedures = 118, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2022-11-16 11:31:21,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:31:21,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:31:21,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:31:21,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:31:21,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,221 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:31:21,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:31:21,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:31:21,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:31:21,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (1/1) ... [2022-11-16 11:31:21,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:31:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:21,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:31:21,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:31:21,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:31:21,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:31:21,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:31:21,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:31:21,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:31:21,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:31:21,400 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:31:21,402 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:31:21,642 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:31:21,658 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:31:21,659 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:31:21,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:31:21 BoogieIcfgContainer [2022-11-16 11:31:21,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:31:21,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:31:21,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:31:21,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:31:21,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:31:20" (1/3) ... [2022-11-16 11:31:21,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70266d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:31:21, skipping insertion in model container [2022-11-16 11:31:21,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:21" (2/3) ... [2022-11-16 11:31:21,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70266d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:31:21, skipping insertion in model container [2022-11-16 11:31:21,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:31:21" (3/3) ... [2022-11-16 11:31:21,686 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2022-11-16 11:31:21,716 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:31:21,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-16 11:31:21,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:31:21,781 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@232aa8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:31:21,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-16 11:31:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 43 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) [2022-11-16 11:31:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:31:21,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:21,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:31:21,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:21,800 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-16 11:31:21,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:21,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095178971] [2022-11-16 11:31:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:21,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:22,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:22,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095178971] [2022-11-16 11:31:22,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095178971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:22,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:22,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:22,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199272409] [2022-11-16 11:31:22,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:22,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:22,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:22,138 INFO L87 Difference]: Start difference. First operand has 44 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 43 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 4 states, 4 states have (on average 1.5) 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) [2022-11-16 11:31:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:22,218 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-11-16 11:31:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:31:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2022-11-16 11:31:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:22,236 INFO L225 Difference]: With dead ends: 80 [2022-11-16 11:31:22,236 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 11:31:22,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:22,247 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 73 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:22,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 82 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 11:31:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 44. [2022-11-16 11:31:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 43 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) [2022-11-16 11:31:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-11-16 11:31:22,293 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 6 [2022-11-16 11:31:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:22,295 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-11-16 11:31:22,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2022-11-16 11:31:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-11-16 11:31:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:31:22,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:22,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:31:22,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:31:22,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-11-16 11:31:22,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:22,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111802789] [2022-11-16 11:31:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:22,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:22,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111802789] [2022-11-16 11:31:22,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111802789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:22,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:22,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:31:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715623749] [2022-11-16 11:31:22,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:22,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:31:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:31:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:22,410 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2022-11-16 11:31:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:22,452 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-11-16 11:31:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:31:22,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2022-11-16 11:31:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:22,453 INFO L225 Difference]: With dead ends: 42 [2022-11-16 11:31:22,454 INFO L226 Difference]: Without dead ends: 42 [2022-11-16 11:31:22,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:22,455 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:22,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 30 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-16 11:31:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-16 11:31:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 41 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) [2022-11-16 11:31:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-11-16 11:31:22,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 6 [2022-11-16 11:31:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:22,462 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-11-16 11:31:22,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2022-11-16 11:31:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-11-16 11:31:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:31:22,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:22,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:31:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:31:22,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-11-16 11:31:22,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:22,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838680798] [2022-11-16 11:31:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:22,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:22,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838680798] [2022-11-16 11:31:22,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838680798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:22,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:22,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:22,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005191303] [2022-11-16 11:31:22,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:22,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:22,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:22,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:22,685 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. 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) [2022-11-16 11:31:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:22,778 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-11-16 11:31:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:31:22,779 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 [2022-11-16 11:31:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:22,780 INFO L225 Difference]: With dead ends: 72 [2022-11-16 11:31:22,780 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 11:31:22,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:22,782 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:22,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 90 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 11:31:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2022-11-16 11:31:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.5862068965517242) 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) [2022-11-16 11:31:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-11-16 11:31:22,791 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 6 [2022-11-16 11:31:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:22,792 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-11-16 11:31:22,792 INFO L496 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) [2022-11-16 11:31:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-11-16 11:31:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:31:22,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:22,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:31:22,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:31:22,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-16 11:31:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119980513] [2022-11-16 11:31:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:22,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:22,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119980513] [2022-11-16 11:31:22,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119980513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:22,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:22,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:22,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574343166] [2022-11-16 11:31:22,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:22,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:22,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:22,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:22,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:22,981 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2022-11-16 11:31:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:23,079 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-11-16 11:31:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 [2022-11-16 11:31:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:23,081 INFO L225 Difference]: With dead ends: 78 [2022-11-16 11:31:23,081 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 11:31:23,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:23,083 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:23,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 72 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 11:31:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2022-11-16 11:31:23,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 44 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) [2022-11-16 11:31:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-16 11:31:23,089 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 6 [2022-11-16 11:31:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:23,089 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-16 11:31:23,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2022-11-16 11:31:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-16 11:31:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:31:23,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:23,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:31:23,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:31:23,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2022-11-16 11:31:23,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:23,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717688841] [2022-11-16 11:31:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:23,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:23,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:23,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717688841] [2022-11-16 11:31:23,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717688841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:23,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:23,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:23,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931419623] [2022-11-16 11:31:23,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:23,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:23,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:23,292 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2022-11-16 11:31:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:23,379 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-11-16 11:31:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:23,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 [2022-11-16 11:31:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:23,380 INFO L225 Difference]: With dead ends: 77 [2022-11-16 11:31:23,381 INFO L226 Difference]: Without dead ends: 77 [2022-11-16 11:31:23,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:23,385 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 110 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:23,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 72 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-16 11:31:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2022-11-16 11:31:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 44 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) [2022-11-16 11:31:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-16 11:31:23,390 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 6 [2022-11-16 11:31:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:23,391 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-16 11:31:23,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2022-11-16 11:31:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-16 11:31:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:31:23,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:23,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:23,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:31:23,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash -590959631, now seen corresponding path program 1 times [2022-11-16 11:31:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:23,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952067761] [2022-11-16 11:31:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:23,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952067761] [2022-11-16 11:31:23,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952067761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:23,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:23,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756443032] [2022-11-16 11:31:23,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:23,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:23,505 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 11:31:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:23,583 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-11-16 11:31:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-16 11:31:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:23,584 INFO L225 Difference]: With dead ends: 42 [2022-11-16 11:31:23,584 INFO L226 Difference]: Without dead ends: 42 [2022-11-16 11:31:23,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:31:23,586 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:23,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 36 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-16 11:31:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-16 11:31:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 41 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) [2022-11-16 11:31:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-11-16 11:31:23,590 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 9 [2022-11-16 11:31:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:23,590 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-11-16 11:31:23,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 11:31:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-11-16 11:31:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:31:23,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:23,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:23,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:31:23,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash -590959630, now seen corresponding path program 1 times [2022-11-16 11:31:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:23,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120448437] [2022-11-16 11:31:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:23,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120448437] [2022-11-16 11:31:23,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120448437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:23,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:23,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:31:23,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251840624] [2022-11-16 11:31:23,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:23,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:31:23,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:31:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:31:23,899 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-11-16 11:31:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:24,065 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-11-16 11:31:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:31:24,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 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 9 [2022-11-16 11:31:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:24,066 INFO L225 Difference]: With dead ends: 63 [2022-11-16 11:31:24,068 INFO L226 Difference]: Without dead ends: 63 [2022-11-16 11:31:24,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:31:24,070 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 182 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:24,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 52 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-16 11:31:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-11-16 11:31:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 48 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) [2022-11-16 11:31:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-16 11:31:24,081 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 9 [2022-11-16 11:31:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:24,081 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-16 11:31:24,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-11-16 11:31:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-16 11:31:24,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:31:24,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:24,083 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:24,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:31:24,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-16 11:31:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771889947] [2022-11-16 11:31:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:24,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:24,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771889947] [2022-11-16 11:31:24,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771889947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:24,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837511830] [2022-11-16 11:31:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:24,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:24,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:24,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:31:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:31:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:24,499 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:31:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:24,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:25,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837511830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:25,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:31:25,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-16 11:31:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732707258] [2022-11-16 11:31:25,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:25,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:31:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:31:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:31:25,089 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-11-16 11:31:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:25,460 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2022-11-16 11:31:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:31:25,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 10 [2022-11-16 11:31:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:25,462 INFO L225 Difference]: With dead ends: 119 [2022-11-16 11:31:25,462 INFO L226 Difference]: Without dead ends: 119 [2022-11-16 11:31:25,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:31:25,464 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 501 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:25,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 247 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:31:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-16 11:31:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 47. [2022-11-16 11:31:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 46 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) [2022-11-16 11:31:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-11-16 11:31:25,469 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 10 [2022-11-16 11:31:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:25,469 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-11-16 11:31:25,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-11-16 11:31:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-11-16 11:31:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:31:25,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:25,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:25,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:25,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:25,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556842, now seen corresponding path program 1 times [2022-11-16 11:31:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325433661] [2022-11-16 11:31:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:25,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:25,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:25,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325433661] [2022-11-16 11:31:25,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325433661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:25,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074457589] [2022-11-16 11:31:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:25,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:25,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:25,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:31:26,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:31:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:31:26,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:26,085 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:31:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:26,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:26,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074457589] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:31:26,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:26,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 12 [2022-11-16 11:31:26,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838767628] [2022-11-16 11:31:26,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:26,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:26,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:31:26,296 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-16 11:31:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:26,360 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-11-16 11:31:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2022-11-16 11:31:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:26,362 INFO L225 Difference]: With dead ends: 46 [2022-11-16 11:31:26,362 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 11:31:26,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:31:26,365 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:26,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 24 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 11:31:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-11-16 11:31:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.4) internal successors, (49), 43 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) [2022-11-16 11:31:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-11-16 11:31:26,380 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 10 [2022-11-16 11:31:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:26,380 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-11-16 11:31:26,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-16 11:31:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-11-16 11:31:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:26,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:26,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:26,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:26,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:31:26,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:26,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2134761079, now seen corresponding path program 1 times [2022-11-16 11:31:26,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:26,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747872709] [2022-11-16 11:31:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:26,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:26,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:26,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747872709] [2022-11-16 11:31:26,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747872709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:26,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:26,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:26,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946998162] [2022-11-16 11:31:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:26,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:31:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:26,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:31:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:26,612 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 11:31:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:26,622 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-16 11:31:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:31:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2022-11-16 11:31:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:26,623 INFO L225 Difference]: With dead ends: 46 [2022-11-16 11:31:26,624 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 11:31:26,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:26,625 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:26,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 11:31:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-16 11:31:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 45 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) [2022-11-16 11:31:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-16 11:31:26,635 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 13 [2022-11-16 11:31:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:26,635 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-16 11:31:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 11:31:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-16 11:31:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:31:26,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:26,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:31:26,637 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1483111174, now seen corresponding path program 1 times [2022-11-16 11:31:26,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:26,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770749405] [2022-11-16 11:31:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:26,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:26,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770749405] [2022-11-16 11:31:26,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770749405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:26,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:26,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:31:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82074491] [2022-11-16 11:31:26,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:26,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:31:26,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:26,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:31:26,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:31:26,887 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2022-11-16 11:31:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:27,043 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-11-16 11:31:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:31:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 [2022-11-16 11:31:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:27,044 INFO L225 Difference]: With dead ends: 68 [2022-11-16 11:31:27,044 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 11:31:27,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:31:27,045 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 83 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:27,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 208 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 11:31:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2022-11-16 11:31:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 51 states have internal predecessors, (57), 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) [2022-11-16 11:31:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-11-16 11:31:27,048 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 15 [2022-11-16 11:31:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:27,048 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-11-16 11:31:27,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2022-11-16 11:31:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-11-16 11:31:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:31:27,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:27,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:27,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:31:27,050 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:27,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:27,051 INFO L85 PathProgramCache]: Analyzing trace with hash 896305160, now seen corresponding path program 1 times [2022-11-16 11:31:27,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:27,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057451979] [2022-11-16 11:31:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:27,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:27,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:27,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057451979] [2022-11-16 11:31:27,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057451979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:27,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:27,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:31:27,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401486636] [2022-11-16 11:31:27,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:27,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:31:27,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:27,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:31:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:31:27,275 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2022-11-16 11:31:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:27,442 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-11-16 11:31:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:31:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 [2022-11-16 11:31:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:27,443 INFO L225 Difference]: With dead ends: 78 [2022-11-16 11:31:27,443 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 11:31:27,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:31:27,444 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:27,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 164 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 11:31:27,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2022-11-16 11:31:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 52 states have internal predecessors, (59), 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) [2022-11-16 11:31:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-11-16 11:31:27,447 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2022-11-16 11:31:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:27,447 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-11-16 11:31:27,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2022-11-16 11:31:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-11-16 11:31:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:31:27,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:27,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:27,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:31:27,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 11:31:27,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:27,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1087742207, now seen corresponding path program 1 times [2022-11-16 11:31:27,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:27,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008696334] [2022-11-16 11:31:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:31:27,462 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:31:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:31:27,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:31:27,484 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:31:27,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2022-11-16 11:31:27,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-11-16 11:31:27,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-11-16 11:31:27,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-11-16 11:31:27,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-11-16 11:31:27,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-11-16 11:31:27,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-11-16 11:31:27,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2022-11-16 11:31:27,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-11-16 11:31:27,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-11-16 11:31:27,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-11-16 11:31:27,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-11-16 11:31:27,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (3 of 16 remaining) [2022-11-16 11:31:27,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (2 of 16 remaining) [2022-11-16 11:31:27,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (1 of 16 remaining) [2022-11-16 11:31:27,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2022-11-16 11:31:27,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:31:27,494 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:27,498 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 11:31:27,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 11:31:27 BoogieIcfgContainer [2022-11-16 11:31:27,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 11:31:27,523 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 11:31:27,523 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 11:31:27,523 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 11:31:27,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:31:21" (3/4) ... [2022-11-16 11:31:27,525 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 11:31:27,559 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 11:31:27,559 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 11:31:27,560 INFO L158 Benchmark]: Toolchain (without parser) took 6993.08ms. Allocated memory was 90.2MB in the beginning and 151.0MB in the end (delta: 60.8MB). Free memory was 52.2MB in the beginning and 100.6MB in the end (delta: -48.4MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2022-11-16 11:31:27,560 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory was 69.8MB in the beginning and 69.7MB in the end (delta: 79.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:31:27,561 INFO L158 Benchmark]: CACSL2BoogieTranslator took 557.29ms. Allocated memory was 90.2MB in the beginning and 125.8MB in the end (delta: 35.7MB). Free memory was 52.0MB in the beginning and 95.2MB in the end (delta: -43.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-16 11:31:27,561 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.91ms. Allocated memory is still 125.8MB. Free memory was 95.2MB in the beginning and 93.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:31:27,561 INFO L158 Benchmark]: Boogie Preprocessor took 39.49ms. Allocated memory is still 125.8MB. Free memory was 93.3MB in the beginning and 91.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:31:27,562 INFO L158 Benchmark]: RCFGBuilder took 435.85ms. Allocated memory is still 125.8MB. Free memory was 91.7MB in the beginning and 77.8MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 11:31:27,562 INFO L158 Benchmark]: TraceAbstraction took 5849.44ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 77.2MB in the beginning and 102.7MB in the end (delta: -25.5MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. [2022-11-16 11:31:27,562 INFO L158 Benchmark]: Witness Printer took 36.53ms. Allocated memory is still 151.0MB. Free memory was 102.7MB in the beginning and 100.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:31:27,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory was 69.8MB in the beginning and 69.7MB in the end (delta: 79.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 557.29ms. Allocated memory was 90.2MB in the beginning and 125.8MB in the end (delta: 35.7MB). Free memory was 52.0MB in the beginning and 95.2MB in the end (delta: -43.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.91ms. Allocated memory is still 125.8MB. Free memory was 95.2MB in the beginning and 93.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.49ms. Allocated memory is still 125.8MB. Free memory was 93.3MB in the beginning and 91.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 435.85ms. Allocated memory is still 125.8MB. Free memory was 91.7MB in the beginning and 77.8MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5849.44ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 77.2MB in the beginning and 102.7MB in the end (delta: -25.5MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. * Witness Printer took 36.53ms. Allocated memory is still 151.0MB. Free memory was 102.7MB in the beginning and 100.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L536] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=0, length=1, nondetString={-1:0}] [L536] RET, EXPR build_nondet_String() [L536] char* s = build_nondet_String(); [L537] CALL cstrchr(s,__VERIFIER_nondet_int()) [L531] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] return ( (*s == c) ? (char *) s : 0 ); [L537] RET cstrchr(s,__VERIFIER_nondet_int()) - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 5.7s, OverallIterations: 13, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1409 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1409 mSDsluCounter, 1145 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 782 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 709 IncrementalHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 363 mSDtfsCounter, 709 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=12, InterpolantAutomatonStates: 70, 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, 12 MinimizatonAttempts, 255 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 1385 SizeOfPredicates, 2 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 16 InterpolantComputations, 11 PerfectInterpolantSequences, 5/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-16 11:31:27,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e41afc45-42ac-42a9-82b2-a6c97ba9ee50/bin/uautomizer-tPACEb0tL8/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)