./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt --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 dac6403f37599f80fd46825f02fd0972bc86095b ............................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:18:58,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:18:58,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:18:58,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:18:58,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:18:58,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:18:58,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:18:58,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:18:58,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:18:58,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:18:58,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:18:58,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:18:58,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:18:58,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:18:58,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:18:58,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:18:58,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:18:58,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:18:58,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:18:58,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:18:58,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:18:58,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:18:58,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:18:58,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:18:58,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:18:58,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:18:58,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:18:58,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:18:58,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:18:58,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:18:58,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:18:58,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:18:58,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:18:58,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:18:58,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:18:58,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:18:58,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:18:58,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:18:58,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:18:58,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:18:58,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:18:58,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 01:18:58,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:18:58,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:18:58,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:18:58,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:18:58,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:18:58,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:18:58,382 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:18:58,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:18:58,382 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:18:58,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:18:58,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:18:58,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:18:58,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 01:18:58,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:18:58,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 01:18:58,386 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:18:58,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 01:18:58,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:18:58,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 01:18:58,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:18:58,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:18:58,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:18:58,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:18:58,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:18:58,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:18:58,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 01:18:58,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:18:58,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:18:58,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 01:18:58,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:18:58,391 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_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac6403f37599f80fd46825f02fd0972bc86095b [2021-10-13 01:18:58,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:18:58,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:18:58,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:18:58,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:18:58,701 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:18:58,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/ldv-regression/test24-1.c [2021-10-13 01:18:58,780 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/data/f499910b2/8c146b3f4bde4e4e845bd50bf9755c10/FLAG57728cea7 [2021-10-13 01:18:59,258 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:18:59,259 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/sv-benchmarks/c/ldv-regression/test24-1.c [2021-10-13 01:18:59,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/data/f499910b2/8c146b3f4bde4e4e845bd50bf9755c10/FLAG57728cea7 [2021-10-13 01:18:59,643 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/data/f499910b2/8c146b3f4bde4e4e845bd50bf9755c10 [2021-10-13 01:18:59,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:18:59,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 01:18:59,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:18:59,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:18:59,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:18:59,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a42c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59, skipping insertion in model container [2021-10-13 01:18:59,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:18:59,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:18:59,843 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_f48ebda8-d743-45ad-ae34-c75e46c1c630/sv-benchmarks/c/ldv-regression/test24-1.c[704,717] [2021-10-13 01:18:59,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:18:59,854 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:18:59,872 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_f48ebda8-d743-45ad-ae34-c75e46c1c630/sv-benchmarks/c/ldv-regression/test24-1.c[704,717] [2021-10-13 01:18:59,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:18:59,886 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:18:59,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59 WrapperNode [2021-10-13 01:18:59,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:18:59,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 01:18:59,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 01:18:59,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 01:18:59,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 01:18:59,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:18:59,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:18:59,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:18:59,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:18:59,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:18:59,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:18:59,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:18:59,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (1/1) ... [2021-10-13 01:18:59,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:18:59,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:18:59,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:19:00,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:19:00,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:19:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:19:00,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:19:00,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:19:00,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:19:00,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:19:00,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:19:00,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:19:00,245 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 01:19:00,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:19:00 BoogieIcfgContainer [2021-10-13 01:19:00,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:19:00,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:19:00,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:19:00,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:19:00,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:18:59" (1/3) ... [2021-10-13 01:19:00,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521f3931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:19:00, skipping insertion in model container [2021-10-13 01:19:00,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:59" (2/3) ... [2021-10-13 01:19:00,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521f3931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:19:00, skipping insertion in model container [2021-10-13 01:19:00,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:19:00" (3/3) ... [2021-10-13 01:19:00,256 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-1.c [2021-10-13 01:19:00,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:19:00,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 01:19:00,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:19:00,314 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 01:19:00,315 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 01:19:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-10-13 01:19:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 01:19:00,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:00,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:19:00,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:19:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:00,341 INFO L82 PathProgramCache]: Analyzing trace with hash 126985497, now seen corresponding path program 1 times [2021-10-13 01:19:00,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:00,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110349307] [2021-10-13 01:19:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:00,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:00,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:00,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110349307] [2021-10-13 01:19:00,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110349307] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:00,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:00,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 01:19:00,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123197011] [2021-10-13 01:19:00,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 01:19:00,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 01:19:00,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:19:00,529 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-13 01:19:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:00,543 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-10-13 01:19:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 01:19:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-10-13 01:19:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:00,561 INFO L225 Difference]: With dead ends: 23 [2021-10-13 01:19:00,561 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 01:19:00,564 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 [2021-10-13 01:19:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 01:19:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 01:19:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2021-10-13 01:19:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-13 01:19:00,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-10-13 01:19:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:00,593 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-13 01:19:00,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-13 01:19:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-13 01:19:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 01:19:00,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:00,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:19:00,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:19:00,596 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:19:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:00,597 INFO L82 PathProgramCache]: Analyzing trace with hash -564424753, now seen corresponding path program 1 times [2021-10-13 01:19:00,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:00,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40916474] [2021-10-13 01:19:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:00,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:00,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:00,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40916474] [2021-10-13 01:19:00,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40916474] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:00,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:00,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:19:00,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024036982] [2021-10-13 01:19:00,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:19:00,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:00,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:19:00,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:19:00,810 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.8) 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) [2021-10-13 01:19:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:00,865 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-13 01:19:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:19:00,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) 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 [2021-10-13 01:19:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:00,866 INFO L225 Difference]: With dead ends: 17 [2021-10-13 01:19:00,867 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 01:19:00,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:19:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 01:19:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-13 01:19:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2021-10-13 01:19:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-13 01:19:00,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-10-13 01:19:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:00,872 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-13 01:19:00,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) 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) [2021-10-13 01:19:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-13 01:19:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:19:00,873 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:00,873 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:19:00,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:19:00,874 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:19:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:00,875 INFO L82 PathProgramCache]: Analyzing trace with hash 263489748, now seen corresponding path program 1 times [2021-10-13 01:19:00,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:00,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289891435] [2021-10-13 01:19:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:00,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:01,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:01,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289891435] [2021-10-13 01:19:01,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289891435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:01,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563043311] [2021-10-13 01:19:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:01,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:01,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:01,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:19:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 01:19:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:01,416 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 27 treesize of output 23 [2021-10-13 01:19:01,968 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-10-13 01:19:01,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 44 [2021-10-13 01:19:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:02,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563043311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:02,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:02,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-10-13 01:19:02,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700627369] [2021-10-13 01:19:02,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:19:02,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:19:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:19:02,036 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-10-13 01:19:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:04,493 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-10-13 01:19:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:19:04,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 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 11 [2021-10-13 01:19:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:04,493 INFO L225 Difference]: With dead ends: 12 [2021-10-13 01:19:04,493 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 01:19:04,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 597.0ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-10-13 01:19:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 01:19:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 01:19:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-13 01:19:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 01:19:04,495 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-10-13 01:19:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:04,495 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 01:19:04,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-10-13 01:19:04,496 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 01:19:04,496 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 01:19:04,498 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 01:19:04,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:04,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:04,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 01:19:04,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 01:19:04,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 01:19:04,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 01:19:04,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 01:19:04,788 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 01:19:04,788 INFO L857 garLoopResultBuilder]: For program point L31(lines 31 33) no Hoare annotation was computed. [2021-10-13 01:19:04,789 INFO L857 garLoopResultBuilder]: For program point L23(lines 23 34) no Hoare annotation was computed. [2021-10-13 01:19:04,789 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 34) no Hoare annotation was computed. [2021-10-13 01:19:04,789 INFO L853 garLoopResultBuilder]: At program point L13(lines 11 14) the Hoare annotation is: (let ((.cse1 (select |#memory_int| |ULTIMATE.start_main_~#ad1~0.base|))) (and (= ULTIMATE.start_main_~pa~0.base |ULTIMATE.start_main_~#ad1~0.base|) (= |ULTIMATE.start_main_~#ad1~0.offset| 0) (let ((.cse0 (div (+ (* |ULTIMATE.start_main_~#ad1~0.offset| (- 1)) ULTIMATE.start_main_~pa~0.offset) 8))) (= .cse0 (select .cse1 (+ (* .cse0 8) |ULTIMATE.start_main_~#ad1~0.offset|)))) (<= 1 |ULTIMATE.start_check_#res|) (= (mod (+ ULTIMATE.start_main_~pa~0.offset (* |ULTIMATE.start_main_~#ad1~0.offset| 7)) 8) 0) (= ULTIMATE.start_main_~i~0 (select .cse1 (+ (* ULTIMATE.start_main_~i~0 8) |ULTIMATE.start_main_~#ad1~0.offset|))) (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1)))) [2021-10-13 01:19:04,789 INFO L853 garLoopResultBuilder]: At program point L32(lines 17 40) the Hoare annotation is: false [2021-10-13 01:19:04,789 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 01:19:04,789 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 01:19:04,789 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 01:19:04,789 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2021-10-13 01:19:04,790 INFO L853 garLoopResultBuilder]: At program point L28-3(lines 28 30) the Hoare annotation is: (and (= ULTIMATE.start_main_~pa~0.base |ULTIMATE.start_main_~#ad1~0.base|) (= |ULTIMATE.start_main_~#ad1~0.offset| 0) (let ((.cse0 (div (+ (* |ULTIMATE.start_main_~#ad1~0.offset| (- 1)) ULTIMATE.start_main_~pa~0.offset) 8))) (= .cse0 (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0.base|) (+ (* .cse0 8) |ULTIMATE.start_main_~#ad1~0.offset|)))) (= (mod (+ ULTIMATE.start_main_~pa~0.offset (* |ULTIMATE.start_main_~#ad1~0.offset| 7)) 8) 0) (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1))) [2021-10-13 01:19:04,790 INFO L857 garLoopResultBuilder]: For program point L28-4(lines 28 30) no Hoare annotation was computed. [2021-10-13 01:19:04,790 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 38) no Hoare annotation was computed. [2021-10-13 01:19:04,790 INFO L860 garLoopResultBuilder]: At program point L39(lines 16 40) the Hoare annotation is: true [2021-10-13 01:19:04,793 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:19:04,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:19:04 BoogieIcfgContainer [2021-10-13 01:19:04,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:19:04,809 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:19:04,809 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:19:04,809 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:19:04,810 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:19:00" (3/4) ... [2021-10-13 01:19:04,813 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 01:19:04,822 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-13 01:19:04,823 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-13 01:19:04,823 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 01:19:04,823 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 01:19:04,850 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((pa == ad1 && ad1 == 0) && (ad1 * -1 + pa) / 8 == unknown-#memory_int-unknown[ad1][(ad1 * -1 + pa) / 8 * 8 + ad1]) && 1 <= \result) && (pa + ad1 * 7) % 8 == 0) && i == unknown-#memory_int-unknown[ad1][i * 8 + ad1]) && i < unknown-#memory_int-unknown[pa][pa] + 1 [2021-10-13 01:19:04,876 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 01:19:04,876 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:19:04,877 INFO L168 Benchmark]: Toolchain (without parser) took 5229.96 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 56.4 MB in the beginning and 64.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:19:04,880 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory was 62.7 MB in the beginning and 62.7 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:19:04,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.69 ms. Allocated memory is still 90.2 MB. Free memory was 56.0 MB in the beginning and 66.6 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:19:04,881 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.97 ms. Allocated memory is still 90.2 MB. Free memory was 66.6 MB in the beginning and 65.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:19:04,881 INFO L168 Benchmark]: Boogie Preprocessor took 23.53 ms. Allocated memory is still 90.2 MB. Free memory was 65.0 MB in the beginning and 64.0 MB in the end (delta: 981.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:19:04,882 INFO L168 Benchmark]: RCFGBuilder took 299.89 ms. Allocated memory is still 90.2 MB. Free memory was 64.0 MB in the beginning and 54.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:19:04,882 INFO L168 Benchmark]: TraceAbstraction took 4558.82 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 53.7 MB in the beginning and 66.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-10-13 01:19:04,883 INFO L168 Benchmark]: Witness Printer took 67.58 ms. Allocated memory is still 109.1 MB. Free memory was 66.9 MB in the beginning and 64.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:19:04,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory was 62.7 MB in the beginning and 62.7 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 238.69 ms. Allocated memory is still 90.2 MB. Free memory was 56.0 MB in the beginning and 66.6 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.97 ms. Allocated memory is still 90.2 MB. Free memory was 66.6 MB in the beginning and 65.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.53 ms. Allocated memory is still 90.2 MB. Free memory was 65.0 MB in the beginning and 64.0 MB in the end (delta: 981.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 299.89 ms. Allocated memory is still 90.2 MB. Free memory was 64.0 MB in the beginning and 54.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4558.82 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 53.7 MB in the beginning and 66.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Witness Printer took 67.58 ms. Allocated memory is still 109.1 MB. Free memory was 66.9 MB in the beginning and 64.8 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 - PositiveResult [Line: 38]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4487.8ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 10.1ms, AutomataDifference: 2580.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 77.9ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 23 SDtfs, 24 SDslu, 12 SDs, 0 SdLazy, 70 SolverSat, 8 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2115.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 656.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 7 NumberOfFragments, 112 HoareAnnotationTreeSize, 4 FomulaSimplifications, 58 FormulaSimplificationTreeSizeReduction, 18.9ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 53.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 22.6ms SsaConstructionTime, 139.0ms SatisfiabilityAnalysisTime, 1218.7ms InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 35 ConstructedInterpolants, 2 QuantifiedInterpolants, 409 SizeOfPredicates, 13 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((((pa == ad1 && ad1 == 0) && (ad1 * -1 + pa) / 8 == unknown-#memory_int-unknown[ad1][(ad1 * -1 + pa) / 8 * 8 + ad1]) && 1 <= \result) && (pa + ad1 * 7) % 8 == 0) && i == unknown-#memory_int-unknown[ad1][i * 8 + ad1]) && i < unknown-#memory_int-unknown[pa][pa] + 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((pa == ad1 && ad1 == 0) && (ad1 * -1 + pa) / 8 == unknown-#memory_int-unknown[ad1][(ad1 * -1 + pa) / 8 * 8 + ad1]) && (pa + ad1 * 7) % 8 == 0) && i < unknown-#memory_int-unknown[pa][pa] + 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 01:19:04,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebda8-d743-45ad-ae34-c75e46c1c630/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...