./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/skippedu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/skippedu.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 578aa1ed819483237cae7cb7b17bc18e9dfff9e081f63e5821fc4a918d7ba90e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:57:43,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:57:43,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:57:43,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:57:43,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:57:43,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:57:43,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:57:43,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:57:43,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:57:43,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:57:43,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:57:43,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:57:43,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:57:43,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:57:43,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:57:43,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:57:43,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:57:43,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:57:43,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:57:43,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:57:43,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:57:43,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:57:43,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:57:43,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:57:43,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:57:43,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:57:43,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:57:43,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:57:43,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:57:43,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:57:43,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:57:43,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:57:43,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:57:43,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:57:43,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:57:43,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:57:43,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:57:43,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:57:43,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:57:43,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:57:43,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:57:43,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:57:43,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:57:43,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:57:43,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:57:43,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:57:43,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:57:43,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:57:43,561 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:57:43,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:57:43,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:57:43,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:57:43,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:57:43,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:57:43,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:57:43,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:57:43,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:57:43,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:57:43,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:57:43,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:57:43,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:57:43,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:57:43,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:57:43,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:57:43,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:57:43,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:57:43,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:57:43,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:57:43,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:57:43,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:57:43,566 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:57:43,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:57:43,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:57:43,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:57:43,569 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_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 578aa1ed819483237cae7cb7b17bc18e9dfff9e081f63e5821fc4a918d7ba90e [2021-10-21 19:57:43,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:57:43,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:57:43,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:57:43,905 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:57:43,905 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:57:43,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/array-tiling/skippedu.c [2021-10-21 19:57:43,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/data/4b6eab546/d7547b5e4bb54870baf86e03a500ab1e/FLAG6284db35f [2021-10-21 19:57:44,428 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:57:44,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/sv-benchmarks/c/array-tiling/skippedu.c [2021-10-21 19:57:44,441 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/data/4b6eab546/d7547b5e4bb54870baf86e03a500ab1e/FLAG6284db35f [2021-10-21 19:57:44,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/data/4b6eab546/d7547b5e4bb54870baf86e03a500ab1e [2021-10-21 19:57:44,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:57:44,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:57:44,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:57:44,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:57:44,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:57:44,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:57:44" (1/1) ... [2021-10-21 19:57:44,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f0a744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:44, skipping insertion in model container [2021-10-21 19:57:44,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:57:44" (1/1) ... [2021-10-21 19:57:44,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:57:44,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:57:45,028 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/sv-benchmarks/c/array-tiling/skippedu.c[399,412] [2021-10-21 19:57:45,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:57:45,054 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:57:45,066 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/sv-benchmarks/c/array-tiling/skippedu.c[399,412] [2021-10-21 19:57:45,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:57:45,088 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:57:45,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45 WrapperNode [2021-10-21 19:57:45,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:57:45,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:57:45,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:57:45,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:57:45,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:57:45,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:57:45,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:57:45,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:57:45,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:57:45,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:57:45,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:57:45,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:57:45,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (1/1) ... [2021-10-21 19:57:45,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:57:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:45,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:57:45,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:57:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:57:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:57:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:57:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:57:45,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:57:45,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:57:45,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:57:45,465 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:57:45,466 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-21 19:57:45,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:57:45 BoogieIcfgContainer [2021-10-21 19:57:45,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:57:45,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:57:45,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:57:45,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:57:45,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:57:44" (1/3) ... [2021-10-21 19:57:45,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108de069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:57:45, skipping insertion in model container [2021-10-21 19:57:45,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:45" (2/3) ... [2021-10-21 19:57:45,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108de069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:57:45, skipping insertion in model container [2021-10-21 19:57:45,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:57:45" (3/3) ... [2021-10-21 19:57:45,477 INFO L111 eAbstractionObserver]: Analyzing ICFG skippedu.c [2021-10-21 19:57:45,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:57:45,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:57:45,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:57:45,563 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:57:45,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:57:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:57:45,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:45,589 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:45,591 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2021-10-21 19:57:45,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:45,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403059739] [2021-10-21 19:57:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:45,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:45,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:45,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403059739] [2021-10-21 19:57:45,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403059739] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:45,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:45,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:57:45,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048608192] [2021-10-21 19:57:45,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:57:45,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:57:45,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:57:45,783 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:45,799 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-10-21 19:57:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:57:45,800 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 19:57:45,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:45,808 INFO L225 Difference]: With dead ends: 43 [2021-10-21 19:57:45,808 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 19:57:45,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:57:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 19:57:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-21 19:57:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-21 19:57:45,840 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2021-10-21 19:57:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:45,841 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-21 19:57:45,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-21 19:57:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:57:45,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:45,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:45,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:57:45,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2021-10-21 19:57:45,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:45,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670364731] [2021-10-21 19:57:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:45,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:45,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:45,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670364731] [2021-10-21 19:57:45,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670364731] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:45,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:45,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:57:45,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88488205] [2021-10-21 19:57:45,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:57:45,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:57:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:57:45,916 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:45,956 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-10-21 19:57:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:57:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 19:57:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:45,958 INFO L225 Difference]: With dead ends: 37 [2021-10-21 19:57:45,958 INFO L226 Difference]: Without dead ends: 22 [2021-10-21 19:57:45,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:57:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-21 19:57:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-21 19:57:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-21 19:57:45,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2021-10-21 19:57:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:45,964 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-21 19:57:45,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-21 19:57:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:57:45,965 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:45,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:45,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:57:45,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:45,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2021-10-21 19:57:45,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:45,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270830138] [2021-10-21 19:57:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:45,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:46,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:46,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270830138] [2021-10-21 19:57:46,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270830138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:46,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834787016] [2021-10-21 19:57:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:46,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:46,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:46,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:46,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:57:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:46,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:57:46,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:57:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834787016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:46,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:57:46,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-21 19:57:46,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394265525] [2021-10-21 19:57:46,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:57:46,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:57:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:57:46,366 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:46,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:46,438 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-10-21 19:57:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:57:46,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 14 [2021-10-21 19:57:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:46,440 INFO L225 Difference]: With dead ends: 39 [2021-10-21 19:57:46,440 INFO L226 Difference]: Without dead ends: 24 [2021-10-21 19:57:46,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:57:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-21 19:57:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-10-21 19:57:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-21 19:57:46,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-10-21 19:57:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:46,459 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-21 19:57:46,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-21 19:57:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:57:46,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:46,462 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:46,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:46,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-21 19:57:46,689 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:46,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:46,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2021-10-21 19:57:46,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:46,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153122166] [2021-10-21 19:57:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:46,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:57:46,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:46,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153122166] [2021-10-21 19:57:46,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153122166] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:57:46,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:57:46,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:57:46,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445440066] [2021-10-21 19:57:46,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:57:46,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:46,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:57:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:57:46,872 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:46,934 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-10-21 19:57:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:57:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-21 19:57:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:46,937 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:57:46,937 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:57:46,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:57:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:57:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-10-21 19:57:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-10-21 19:57:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-21 19:57:46,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-10-21 19:57:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:46,948 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-21 19:57:46,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-21 19:57:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:57:46,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:46,950 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:46,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:57:46,951 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2021-10-21 19:57:46,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:46,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957597548] [2021-10-21 19:57:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:46,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:57:47,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:47,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957597548] [2021-10-21 19:57:47,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957597548] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:47,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932552994] [2021-10-21 19:57:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:47,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:47,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:47,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:47,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:57:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:47,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:57:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:47,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-21 19:57:47,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-21 19:57:47,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:57:47,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:57:47,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-10-21 19:57:47,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:57:47,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-10-21 19:57:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:57:47,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932552994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:47,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:57:47,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-10-21 19:57:47,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809564926] [2021-10-21 19:57:47,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:57:47,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:57:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:57:47,615 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:47,934 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2021-10-21 19:57:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:57:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 21 [2021-10-21 19:57:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:47,941 INFO L225 Difference]: With dead ends: 78 [2021-10-21 19:57:47,941 INFO L226 Difference]: Without dead ends: 76 [2021-10-21 19:57:47,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:57:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-21 19:57:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-10-21 19:57:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 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) [2021-10-21 19:57:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-10-21 19:57:47,958 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2021-10-21 19:57:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:47,964 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-10-21 19:57:47,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-10-21 19:57:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:57:47,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:47,967 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:48,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:48,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:48,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2021-10-21 19:57:48,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:48,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670815651] [2021-10-21 19:57:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:48,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:57:48,210 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:57:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:57:48,254 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:57:48,254 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:57:48,255 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:57:48,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:57:48,264 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:57:48,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:57:48 BoogieIcfgContainer [2021-10-21 19:57:48,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:57:48,300 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:57:48,300 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:57:48,301 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:57:48,301 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:57:45" (3/4) ... [2021-10-21 19:57:48,303 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:57:48,352 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:57:48,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:57:48,354 INFO L168 Benchmark]: Toolchain (without parser) took 3547.37 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 73.0 MB in the beginning and 66.0 MB in the end (delta: 7.0 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:48,354 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory was 89.7 MB in the beginning and 89.6 MB in the end (delta: 66.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:57:48,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.84 ms. Allocated memory is still 109.1 MB. Free memory was 72.8 MB in the beginning and 84.9 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:48,355 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.26 ms. Allocated memory is still 109.1 MB. Free memory was 84.9 MB in the beginning and 83.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:57:48,356 INFO L168 Benchmark]: Boogie Preprocessor took 25.92 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 82.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:48,356 INFO L168 Benchmark]: RCFGBuilder took 314.87 ms. Allocated memory is still 109.1 MB. Free memory was 82.1 MB in the beginning and 71.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:48,357 INFO L168 Benchmark]: TraceAbstraction took 2830.35 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 70.6 MB in the beginning and 68.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:48,358 INFO L168 Benchmark]: Witness Printer took 52.41 ms. Allocated memory is still 140.5 MB. Free memory was 68.1 MB in the beginning and 66.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:48,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory was 89.7 MB in the beginning and 89.6 MB in the end (delta: 66.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 276.84 ms. Allocated memory is still 109.1 MB. Free memory was 72.8 MB in the beginning and 84.9 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.26 ms. Allocated memory is still 109.1 MB. Free memory was 84.9 MB in the beginning and 83.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.92 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 82.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 314.87 ms. Allocated memory is still 109.1 MB. Free memory was 82.1 MB in the beginning and 71.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2830.35 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 70.6 MB in the beginning and 68.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. * Witness Printer took 52.41 ms. Allocated memory is still 140.5 MB. Free memory was 68.1 MB in the beginning and 66.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int SIZE; [L14] const int MAX = 100000; VAL [MAX=100000, SIZE=0] [L18] SIZE = __VERIFIER_nondet_int() [L19] COND TRUE SIZE > 1 && SIZE < MAX [L21] int i; [L22] int *a = malloc(sizeof(int)*SIZE); [L24] i = 0 VAL [MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [MAX=100000, SIZE=2] [L24] COND FALSE !(i < SIZE) VAL [MAX=100000, SIZE=2] [L29] COND FALSE !(SIZE % 2 != 0) [L6] COND FALSE !(!cond) VAL [MAX=100000, SIZE=2] [L32] i = 1 VAL [MAX=100000, SIZE=2] [L32] COND TRUE i <= SIZE/2 [L34] EXPR a[2*i-2] VAL [MAX=100000, SIZE=2] [L34] COND FALSE !(a[2*i-2] > i) [L38] EXPR a[2*i-1] VAL [MAX=100000, SIZE=2] [L38] COND TRUE a[2*i-1] > i [L40] a[2*i-1] = 2*i-1 VAL [MAX=100000, SIZE=2] [L32] i++ VAL [MAX=100000, SIZE=2] [L32] COND FALSE !(i <= SIZE/2) VAL [MAX=100000, SIZE=2] [L44] i = 0 VAL [MAX=100000, SIZE=2] [L44] COND TRUE i < SIZE [L46] a[i] [L8] COND TRUE !(cond) VAL [MAX=100000, SIZE=2] [L8] reach_error() VAL [MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2707.3ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 19.9ms, AutomataDifference: 565.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 105 SDtfs, 149 SDslu, 103 SDs, 0 SdLazy, 251 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 223.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 294.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 37 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 43.8ms SsaConstructionTime, 198.5ms SatisfiabilityAnalysisTime, 1045.3ms InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 515 SizeOfPredicates, 9 NumberOfNonLiveVariables, 177 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:57:48,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f3405f5-1b91-4848-9cd4-e736118a1d46/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...