./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3 --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 fdc3c556d58a22f0b5db1f711cca081eb180f3b4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-5709675 [2021-10-15 20:14:44,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:14:44,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:14:44,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:14:44,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:14:44,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:14:44,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:14:44,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:14:44,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:14:44,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:14:44,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:14:44,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:14:44,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:14:44,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:14:44,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:14:44,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:14:44,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:14:44,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:14:44,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:14:44,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:14:44,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:14:44,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:14:44,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:14:44,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:14:44,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:14:44,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:14:44,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:14:44,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:14:44,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:14:44,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:14:44,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:14:44,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:14:44,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:14:44,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:14:44,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:14:44,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:14:44,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:14:44,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:14:44,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:14:44,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:14:44,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:14:44,175 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:14:44,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:14:44,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:14:44,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:14:44,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:14:44,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:14:44,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:14:44,204 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:14:44,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:14:44,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:14:44,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:14:44,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:14:44,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:14:44,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:14:44,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:14:44,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:14:44,207 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:14:44,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:14:44,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:14:44,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:14:44,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:14:44,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:14:44,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:14:44,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:14:44,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:14:44,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:14:44,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:14:44,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:14:44,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:14:44,210 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:14:44,210 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:14:44,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:14:44,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:14:44,211 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_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdc3c556d58a22f0b5db1f711cca081eb180f3b4 [2021-10-15 20:14:44,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:14:44,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:14:44,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:14:44,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:14:44,581 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:14:44,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2021-10-15 20:14:44,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/data/e25e00685/f703f4fe59aa4eb08f64bac0053cea94/FLAG318bbfa43 [2021-10-15 20:14:45,205 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:14:45,205 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2021-10-15 20:14:45,212 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/data/e25e00685/f703f4fe59aa4eb08f64bac0053cea94/FLAG318bbfa43 [2021-10-15 20:14:45,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/data/e25e00685/f703f4fe59aa4eb08f64bac0053cea94 [2021-10-15 20:14:45,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:14:45,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:14:45,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:14:45,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:14:45,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:14:45,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69bd4995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45, skipping insertion in model container [2021-10-15 20:14:45,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:14:45,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:14:45,792 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_0225741e-1df8-4717-bef8-8fce2dba1100/sv-benchmarks/c/bitvector-loops/diamond_2-1.c[373,386] [2021-10-15 20:14:45,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:14:45,835 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:14:45,847 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_0225741e-1df8-4717-bef8-8fce2dba1100/sv-benchmarks/c/bitvector-loops/diamond_2-1.c[373,386] [2021-10-15 20:14:45,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:14:45,870 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:14:45,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45 WrapperNode [2021-10-15 20:14:45,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:14:45,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:14:45,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:14:45,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:14:45,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:14:45,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:14:45,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:14:45,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:14:45,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:14:45,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:14:45,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:14:45,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:14:45,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (1/1) ... [2021-10-15 20:14:45,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:14:45,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:45,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:14:45,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:14:46,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:14:46,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:14:46,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:14:46,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:14:46,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:14:46,331 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:14:46,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:46 BoogieIcfgContainer [2021-10-15 20:14:46,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:14:46,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:14:46,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:14:46,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:14:46,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:14:45" (1/3) ... [2021-10-15 20:14:46,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b91e079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:14:46, skipping insertion in model container [2021-10-15 20:14:46,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:45" (2/3) ... [2021-10-15 20:14:46,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b91e079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:14:46, skipping insertion in model container [2021-10-15 20:14:46,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:46" (3/3) ... [2021-10-15 20:14:46,343 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2021-10-15 20:14:46,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:14:46,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:14:46,405 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:14:46,412 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=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 [2021-10-15 20:14:46,412 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:14:46,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 32 transitions, 64 flow [2021-10-15 20:14:46,464 INFO L129 PetriNetUnfolder]: 13/32 cut-off events. [2021-10-15 20:14:46,464 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:46,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 32 events. 13/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:14:46,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 32 transitions, 64 flow [2021-10-15 20:14:46,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 28 transitions, 56 flow [2021-10-15 20:14:46,495 INFO L129 PetriNetUnfolder]: 5/14 cut-off events. [2021-10-15 20:14:46,495 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:46,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:46,496 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:14:46,497 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 891600039, now seen corresponding path program 1 times [2021-10-15 20:14:46,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:46,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640729565] [2021-10-15 20:14:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:46,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:46,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:46,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640729565] [2021-10-15 20:14:46,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640729565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:46,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:46,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:14:46,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682686600] [2021-10-15 20:14:46,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:14:46,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:46,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:14:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:14:46,736 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 32 [2021-10-15 20:14:46,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 28 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-10-15 20:14:46,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:46,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 32 [2021-10-15 20:14:46,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:46,764 INFO L129 PetriNetUnfolder]: 11/27 cut-off events. [2021-10-15 20:14:46,764 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:46,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 27 events. 11/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2021-10-15 20:14:46,766 INFO L132 encePairwiseOnDemand]: 31/32 looper letters, 0 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2021-10-15 20:14:46,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 27 transitions, 54 flow [2021-10-15 20:14:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:14:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:14:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 61 transitions. [2021-10-15 20:14:46,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.953125 [2021-10-15 20:14:46,797 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 61 transitions. [2021-10-15 20:14:46,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 61 transitions. [2021-10-15 20:14:46,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:46,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 61 transitions. [2021-10-15 20:14:46,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-10-15 20:14:46,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-10-15 20:14:46,825 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-10-15 20:14:46,828 INFO L186 Difference]: Start difference. First operand has 17 places, 28 transitions, 56 flow. Second operand 2 states and 61 transitions. [2021-10-15 20:14:46,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 27 transitions, 54 flow [2021-10-15 20:14:46,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 27 transitions, 54 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:14:46,851 INFO L242 Difference]: Finished difference. Result has 18 places, 27 transitions, 54 flow [2021-10-15 20:14:46,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=18, PETRI_TRANSITIONS=27} [2021-10-15 20:14:46,854 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-10-15 20:14:46,854 INFO L470 AbstractCegarLoop]: Abstraction has has 18 places, 27 transitions, 54 flow [2021-10-15 20:14:46,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-10-15 20:14:46,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:46,855 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 20:14:46,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:14:46,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash 889693415, now seen corresponding path program 1 times [2021-10-15 20:14:46,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:46,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396241895] [2021-10-15 20:14:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:46,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:47,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:47,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396241895] [2021-10-15 20:14:47,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396241895] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:47,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:47,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:47,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904823312] [2021-10-15 20:14:47,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:47,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:14:47,093 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2021-10-15 20:14:47,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 27 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-10-15 20:14:47,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:47,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2021-10-15 20:14:47,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:47,155 INFO L129 PetriNetUnfolder]: 12/30 cut-off events. [2021-10-15 20:14:47,156 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:47,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 30 events. 12/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 57. Up to 26 conditions per place. [2021-10-15 20:14:47,157 INFO L132 encePairwiseOnDemand]: 28/32 looper letters, 24 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2021-10-15 20:14:47,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 30 transitions, 114 flow [2021-10-15 20:14:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2021-10-15 20:14:47,160 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2021-10-15 20:14:47,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2021-10-15 20:14:47,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2021-10-15 20:14:47,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:47,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2021-10-15 20:14:47,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:47,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-10-15 20:14:47,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-10-15 20:14:47,167 INFO L186 Difference]: Start difference. First operand has 18 places, 27 transitions, 54 flow. Second operand 3 states and 46 transitions. [2021-10-15 20:14:47,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 30 transitions, 114 flow [2021-10-15 20:14:47,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:14:47,172 INFO L242 Difference]: Finished difference. Result has 21 places, 29 transitions, 73 flow [2021-10-15 20:14:47,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=21, PETRI_TRANSITIONS=29} [2021-10-15 20:14:47,173 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 4 predicate places. [2021-10-15 20:14:47,173 INFO L470 AbstractCegarLoop]: Abstraction has has 21 places, 29 transitions, 73 flow [2021-10-15 20:14:47,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-10-15 20:14:47,174 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:47,174 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:47,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:14:47,175 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:47,176 INFO L82 PathProgramCache]: Analyzing trace with hash -857064336, now seen corresponding path program 1 times [2021-10-15 20:14:47,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:47,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303007900] [2021-10-15 20:14:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:47,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:47,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:47,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303007900] [2021-10-15 20:14:47,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303007900] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:47,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:47,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:47,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777417644] [2021-10-15 20:14:47,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:47,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:14:47,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2021-10-15 20:14:47,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-10-15 20:14:47,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:47,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2021-10-15 20:14:47,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:47,319 INFO L129 PetriNetUnfolder]: 12/45 cut-off events. [2021-10-15 20:14:47,319 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 20:14:47,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 45 events. 12/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 90. Up to 22 conditions per place. [2021-10-15 20:14:47,321 INFO L132 encePairwiseOnDemand]: 12/32 looper letters, 24 selfloop transitions, 11 changer transitions 0/40 dead transitions. [2021-10-15 20:14:47,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 40 transitions, 167 flow [2021-10-15 20:14:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2021-10-15 20:14:47,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6979166666666666 [2021-10-15 20:14:47,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2021-10-15 20:14:47,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2021-10-15 20:14:47,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:47,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2021-10-15 20:14:47,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-10-15 20:14:47,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-10-15 20:14:47,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-10-15 20:14:47,327 INFO L186 Difference]: Start difference. First operand has 21 places, 29 transitions, 73 flow. Second operand 3 states and 67 transitions. [2021-10-15 20:14:47,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 40 transitions, 167 flow [2021-10-15 20:14:47,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:14:47,331 INFO L242 Difference]: Finished difference. Result has 24 places, 39 transitions, 176 flow [2021-10-15 20:14:47,332 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=24, PETRI_TRANSITIONS=39} [2021-10-15 20:14:47,332 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 7 predicate places. [2021-10-15 20:14:47,332 INFO L470 AbstractCegarLoop]: Abstraction has has 24 places, 39 transitions, 176 flow [2021-10-15 20:14:47,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-10-15 20:14:47,333 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:47,333 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:47,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:14:47,333 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:47,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1853162346, now seen corresponding path program 1 times [2021-10-15 20:14:47,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:47,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253386412] [2021-10-15 20:14:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:47,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:47,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:47,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253386412] [2021-10-15 20:14:47,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253386412] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:47,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:47,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:47,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942166802] [2021-10-15 20:14:47,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:47,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:14:47,379 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2021-10-15 20:14:47,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 39 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-10-15 20:14:47,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:47,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2021-10-15 20:14:47,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:47,468 INFO L129 PetriNetUnfolder]: 2/35 cut-off events. [2021-10-15 20:14:47,468 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-10-15 20:14:47,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 35 events. 2/35 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 10/45 useless extension candidates. Maximal degree in co-relation 89. Up to 14 conditions per place. [2021-10-15 20:14:47,469 INFO L132 encePairwiseOnDemand]: 21/32 looper letters, 24 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2021-10-15 20:14:47,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 166 flow [2021-10-15 20:14:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2021-10-15 20:14:47,473 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2021-10-15 20:14:47,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 58 transitions. [2021-10-15 20:14:47,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 58 transitions. [2021-10-15 20:14:47,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:47,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 58 transitions. [2021-10-15 20:14:47,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-10-15 20:14:47,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-10-15 20:14:47,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-10-15 20:14:47,477 INFO L186 Difference]: Start difference. First operand has 24 places, 39 transitions, 176 flow. Second operand 3 states and 58 transitions. [2021-10-15 20:14:47,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 166 flow [2021-10-15 20:14:47,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:14:47,481 INFO L242 Difference]: Finished difference. Result has 25 places, 29 transitions, 115 flow [2021-10-15 20:14:47,481 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=25, PETRI_TRANSITIONS=29} [2021-10-15 20:14:47,482 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 8 predicate places. [2021-10-15 20:14:47,482 INFO L470 AbstractCegarLoop]: Abstraction has has 25 places, 29 transitions, 115 flow [2021-10-15 20:14:47,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-10-15 20:14:47,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:47,482 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:47,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:14:47,483 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:47,484 INFO L82 PathProgramCache]: Analyzing trace with hash -170777494, now seen corresponding path program 1 times [2021-10-15 20:14:47,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:47,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465760850] [2021-10-15 20:14:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:47,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:14:47,543 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:14:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:14:47,598 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:14:47,599 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:14:47,600 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:14:47,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:14:47,609 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:14:47,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:14:47 BoogieIcfgContainer [2021-10-15 20:14:47,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:14:47,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:14:47,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:14:47,634 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:14:47,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:46" (3/4) ... [2021-10-15 20:14:47,637 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 20:14:47,688 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:14:47,689 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:14:47,691 INFO L168 Benchmark]: Toolchain (without parser) took 2114.16 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 79.2 MB in the beginning and 91.9 MB in the end (delta: -12.7 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:14:47,691 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 109.1 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:14:47,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.00 ms. Allocated memory is still 109.1 MB. Free memory was 78.9 MB in the beginning and 85.6 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:14:47,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.69 ms. Allocated memory is still 109.1 MB. Free memory was 85.6 MB in the beginning and 83.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:14:47,693 INFO L168 Benchmark]: Boogie Preprocessor took 26.58 ms. Allocated memory is still 109.1 MB. Free memory was 83.9 MB in the beginning and 82.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:14:47,694 INFO L168 Benchmark]: RCFGBuilder took 394.27 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 71.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:14:47,694 INFO L168 Benchmark]: TraceAbstraction took 1297.67 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 71.4 MB in the beginning and 94.0 MB in the end (delta: -22.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:14:47,695 INFO L168 Benchmark]: Witness Printer took 55.07 ms. Allocated memory is still 144.7 MB. Free memory was 94.0 MB in the beginning and 91.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:14:47,699 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 109.1 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.00 ms. Allocated memory is still 109.1 MB. Free memory was 78.9 MB in the beginning and 85.6 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.69 ms. Allocated memory is still 109.1 MB. Free memory was 85.6 MB in the beginning and 83.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.58 ms. Allocated memory is still 109.1 MB. Free memory was 83.9 MB in the beginning and 82.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 394.27 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 71.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1297.67 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 71.4 MB in the beginning and 94.0 MB in the end (delta: -22.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * Witness Printer took 55.07 ms. Allocated memory is still 144.7 MB. Free memory was 94.0 MB in the beginning and 91.9 MB in the end (delta: 2.1 MB). There was no memory consumed. 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: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L19] x += 2 [L21] COND FALSE !(y % 2 == 0) [L22] x -= 2 [L24] COND FALSE !(y % 2 == 0) [L25] x += 2 [L27] COND FALSE !(y % 2 == 0) [L28] x -= 2 [L30] COND FALSE !(y % 2 == 0) [L31] x += 2 [L33] COND FALSE !(y % 2 == 0) [L34] x -= 4 [L36] COND FALSE !(y % 2 == 0) [L37] x += 4 [L39] COND FALSE !(y % 2 == 0) [L40] x += 2 [L42] COND FALSE !(y % 2 == 0) [L43] x -= 4 [L45] COND FALSE !(y % 2 == 0) [L46] x -= 4 [L17] COND FALSE !(x < 99) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1207.1ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 412.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 78.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 47 SDtfs, 18 SDslu, 0 SDs, 0 SdLazy, 72 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 132.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=3, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 19.3ms SsaConstructionTime, 116.2ms SatisfiabilityAnalysisTime, 292.5ms InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 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! [2021-10-15 20:14:47,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0225741e-1df8-4717-bef8-8fce2dba1100/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...