./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a69d5fb397906cd89c0147a3c54d3ad7658561b03775140fca8816654a2bbc3d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:42:35,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:42:35,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:42:35,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:42:35,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:42:35,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:42:35,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:42:35,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:42:35,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:42:35,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:42:35,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:42:35,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:42:35,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:42:35,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:42:35,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:42:35,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:42:35,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:42:35,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:42:35,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:42:35,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:42:35,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:42:35,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:42:35,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:42:35,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:42:35,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:42:35,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:42:35,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:42:35,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:42:35,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:42:35,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:42:35,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:42:35,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:42:35,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:42:35,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:42:35,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:42:35,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:42:35,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:42:35,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:42:35,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:42:35,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:42:35,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:42:35,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:42:35,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:42:35,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:42:35,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:42:35,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:42:35,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:42:35,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:42:35,333 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:42:35,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:42:35,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:42:35,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:42:35,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:42:35,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:42:35,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:42:35,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:42:35,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:42:35,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:42:35,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:42:35,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:42:35,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:42:35,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:42:35,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:42:35,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:42:35,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:42:35,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:42:35,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:42:35,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:42:35,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:42:35,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:42:35,341 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:42:35,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:42:35,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:42:35,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:42:35,348 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_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a69d5fb397906cd89c0147a3c54d3ad7658561b03775140fca8816654a2bbc3d [2021-10-21 19:42:35,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:42:35,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:42:35,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:42:35,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:42:35,759 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:42:35,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2021-10-21 19:42:35,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/data/6691429e8/291aa2821b5f46469bdba2138c7928d9/FLAG7248444f5 [2021-10-21 19:42:36,392 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:42:36,393 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2021-10-21 19:42:36,401 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/data/6691429e8/291aa2821b5f46469bdba2138c7928d9/FLAG7248444f5 [2021-10-21 19:42:36,737 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/data/6691429e8/291aa2821b5f46469bdba2138c7928d9 [2021-10-21 19:42:36,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:42:36,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:42:36,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:42:36,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:42:36,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:42:36,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:42:36" (1/1) ... [2021-10-21 19:42:36,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f83f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:36, skipping insertion in model container [2021-10-21 19:42:36,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:42:36" (1/1) ... [2021-10-21 19:42:36,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:42:36,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:42:36,987 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_31d48017-b4bf-4958-8749-003e2c675c3b/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2021-10-21 19:42:37,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:42:37,018 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:42:37,034 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_31d48017-b4bf-4958-8749-003e2c675c3b/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2021-10-21 19:42:37,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:42:37,061 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:42:37,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37 WrapperNode [2021-10-21 19:42:37,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:42:37,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:42:37,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:42:37,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:42:37,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:42:37,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:42:37,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:42:37,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:42:37,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:42:37,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:42:37,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:42:37,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:42:37,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (1/1) ... [2021-10-21 19:42:37,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:42:37,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:37,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:42:37,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:42:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:42:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:42:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:42:37,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:42:37,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:42:37,563 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-21 19:42:37,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:42:37 BoogieIcfgContainer [2021-10-21 19:42:37,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:42:37,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:42:37,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:42:37,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:42:37,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:42:36" (1/3) ... [2021-10-21 19:42:37,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa43924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:42:37, skipping insertion in model container [2021-10-21 19:42:37,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:42:37" (2/3) ... [2021-10-21 19:42:37,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa43924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:42:37, skipping insertion in model container [2021-10-21 19:42:37,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:42:37" (3/3) ... [2021-10-21 19:42:37,589 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.c [2021-10-21 19:42:37,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:42:37,601 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 19:42:37,663 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:42:37,670 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:42:37,671 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 19:42:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:42:37,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:37,694 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:42:37,695 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-10-21 19:42:37,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:37,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124650920] [2021-10-21 19:42:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:37,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:37,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:37,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124650920] [2021-10-21 19:42:37,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124650920] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:37,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:37,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:42:37,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515960105] [2021-10-21 19:42:37,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:42:37,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:37,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:42:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:42:37,924 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:37,943 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-10-21 19:42:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:42:37,945 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:42:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:37,957 INFO L225 Difference]: With dead ends: 34 [2021-10-21 19:42:37,957 INFO L226 Difference]: Without dead ends: 14 [2021-10-21 19:42:37,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:42:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-21 19:42:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-21 19:42:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-21 19:42:38,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-10-21 19:42:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:38,024 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-21 19:42:38,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-21 19:42:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:42:38,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:38,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:42:38,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:42:38,027 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-21 19:42:38,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:38,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095947775] [2021-10-21 19:42:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:38,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:38,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:42:38,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578280774] [2021-10-21 19:42:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:38,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:38,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:38,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:38,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:42:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:38,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:42:38,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:38,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:38,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095947775] [2021-10-21 19:42:38,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:42:38,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578280774] [2021-10-21 19:42:38,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578280774] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:38,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:38,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:42:38,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584037134] [2021-10-21 19:42:38,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:42:38,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:42:38,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:42:38,512 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:38,602 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-10-21 19:42:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:42:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:42:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:38,604 INFO L225 Difference]: With dead ends: 30 [2021-10-21 19:42:38,604 INFO L226 Difference]: Without dead ends: 23 [2021-10-21 19:42:38,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:42:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-21 19:42:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-10-21 19:42:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-21 19:42:38,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-10-21 19:42:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:38,611 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-21 19:42:38,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-21 19:42:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:42:38,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:38,613 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:38,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:38,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:38,839 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-10-21 19:42:38,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:38,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394189247] [2021-10-21 19:42:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:38,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:38,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:42:38,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358798943] [2021-10-21 19:42:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:38,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:38,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:38,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:38,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:42:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:42:39,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:39,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:39,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394189247] [2021-10-21 19:42:39,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:42:39,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358798943] [2021-10-21 19:42:39,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358798943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:39,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:42:39,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:42:39,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745606424] [2021-10-21 19:42:39,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:42:39,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:42:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:42:39,356 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:39,524 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-21 19:42:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:42:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 19:42:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:39,526 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:42:39,526 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:42:39,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:42:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:42:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-10-21 19:42:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-21 19:42:39,533 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-21 19:42:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:39,534 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-21 19:42:39,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-21 19:42:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:42:39,535 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:39,536 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:39,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-21 19:42:39,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:39,737 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-10-21 19:42:39,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:39,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545055950] [2021-10-21 19:42:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:39,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:39,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:42:39,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642239974] [2021-10-21 19:42:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:39,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:39,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:39,759 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:39,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:42:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:42:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:40,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:40,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545055950] [2021-10-21 19:42:40,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:42:40,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642239974] [2021-10-21 19:42:40,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642239974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:40,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:42:40,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:42:40,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115593561] [2021-10-21 19:42:40,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:42:40,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:40,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:42:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:42:40,113 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:40,241 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-21 19:42:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:42:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 19:42:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:40,243 INFO L225 Difference]: With dead ends: 39 [2021-10-21 19:42:40,243 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:42:40,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:42:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:42:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-21 19:42:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-21 19:42:40,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-10-21 19:42:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:40,251 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-21 19:42:40,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-21 19:42:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:42:40,252 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:40,252 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:40,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:40,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:40,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:40,468 INFO L82 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-10-21 19:42:40,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:40,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673616853] [2021-10-21 19:42:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:40,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:40,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:42:40,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947706536] [2021-10-21 19:42:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:40,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:40,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:40,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:40,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:42:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:42:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:40,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:40,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673616853] [2021-10-21 19:42:40,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:42:40,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947706536] [2021-10-21 19:42:40,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947706536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:40,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:42:40,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 19:42:40,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437574443] [2021-10-21 19:42:40,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:42:40,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:42:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:42:40,651 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:40,676 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-10-21 19:42:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:42:40,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-21 19:42:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:40,677 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:42:40,677 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:42:40,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:42:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:42:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-21 19:42:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-21 19:42:40,683 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-10-21 19:42:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:40,683 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-21 19:42:40,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-21 19:42:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:42:40,684 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:40,685 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:40,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:40,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:40,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-10-21 19:42:40,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:40,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029571773] [2021-10-21 19:42:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:40,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:40,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:42:40,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898226373] [2021-10-21 19:42:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:40,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:40,917 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:40,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:42:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:42:41,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:41,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:41,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029571773] [2021-10-21 19:42:41,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:42:41,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898226373] [2021-10-21 19:42:41,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898226373] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:41,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:42:41,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:42:41,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900345443] [2021-10-21 19:42:41,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:42:41,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:42:41,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:42:41,528 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:41,678 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-21 19:42:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:42:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-21 19:42:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:41,680 INFO L225 Difference]: With dead ends: 38 [2021-10-21 19:42:41,680 INFO L226 Difference]: Without dead ends: 34 [2021-10-21 19:42:41,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:42:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-21 19:42:41,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-10-21 19:42:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-21 19:42:41,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-10-21 19:42:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:41,687 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-21 19:42:41,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-21 19:42:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:42:41,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:41,692 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 19:42:41,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:41,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:41,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-10-21 19:42:41,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:41,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103954018] [2021-10-21 19:42:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:41,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:41,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:42:41,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81361519] [2021-10-21 19:42:41,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:42:41,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:41,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:41,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:41,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:42:42,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:42:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:42:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:42:42,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:42,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103954018] [2021-10-21 19:42:42,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:42:42,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81361519] [2021-10-21 19:42:42,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81361519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:42,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:42:42,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:42:42,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936202472] [2021-10-21 19:42:42,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:42:42,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:42:42,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:42:42,167 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:42,199 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-10-21 19:42:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:42:42,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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 18 [2021-10-21 19:42:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:42,205 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:42:42,205 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 19:42:42,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:42:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 19:42:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-21 19:42:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2021-10-21 19:42:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-21 19:42:42,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2021-10-21 19:42:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:42,228 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-21 19:42:42,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:42:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-21 19:42:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:42:42,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:42,230 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:42,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:42,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:42,452 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:42:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:42,453 INFO L82 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2021-10-21 19:42:42,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:42,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388552570] [2021-10-21 19:42:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:42,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:42,465 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:42:42,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949801080] [2021-10-21 19:42:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:42:42,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:42,467 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:42,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:42:42,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:42:42,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 19:42:42,588 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:42:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:42:42,632 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:42:42,633 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:42:42,634 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:42:42,636 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:42:42,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:42,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 19:42:42,843 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:42:42,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:42:42 BoogieIcfgContainer [2021-10-21 19:42:42,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:42:42,879 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:42:42,879 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:42:42,879 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:42:42,880 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:42:37" (3/4) ... [2021-10-21 19:42:42,882 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:42:42,939 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:42:42,939 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:42:42,941 INFO L168 Benchmark]: Toolchain (without parser) took 6198.71 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 54.3 MB in the beginning and 69.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:42,941 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 70.4 MB in the beginning and 70.3 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:42:42,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.77 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 54.2 MB in the beginning and 87.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:42,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.89 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 85.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:42,943 INFO L168 Benchmark]: Boogie Preprocessor took 27.08 ms. Allocated memory is still 111.1 MB. Free memory was 85.5 MB in the beginning and 84.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:42,943 INFO L168 Benchmark]: RCFGBuilder took 429.65 ms. Allocated memory is still 111.1 MB. Free memory was 84.5 MB in the beginning and 74.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:42,944 INFO L168 Benchmark]: TraceAbstraction took 5310.66 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 74.4 MB in the beginning and 72.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:42,944 INFO L168 Benchmark]: Witness Printer took 60.12 ms. Allocated memory is still 134.2 MB. Free memory was 72.7 MB in the beginning and 69.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:42:42,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 70.4 MB in the beginning and 70.3 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 319.77 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 54.2 MB in the beginning and 87.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.89 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 85.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.08 ms. Allocated memory is still 111.1 MB. Free memory was 85.5 MB in the beginning and 84.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 429.65 ms. Allocated memory is still 111.1 MB. Free memory was 84.5 MB in the beginning and 74.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5310.66 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 74.4 MB in the beginning and 72.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. * Witness Printer took 60.12 ms. Allocated memory is still 134.2 MB. Free memory was 72.7 MB in the beginning and 69.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) VAL [counter=1] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=1] [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) VAL [counter=2] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=2] [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND FALSE !(counter++<2) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=3] [L16] reach_error() VAL [counter=3] - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 5179.5ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 20.0ms, AutomataDifference: 688.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 96 SDtfs, 67 SDslu, 187 SDs, 0 SdLazy, 220 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 267.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 424.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=4, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 69.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 30 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.3ms SsaConstructionTime, 231.5ms SatisfiabilityAnalysisTime, 1611.7ms InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 563 SizeOfPredicates, 39 NumberOfNonLiveVariables, 518 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 10/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:42:42,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d48017-b4bf-4958-8749-003e2c675c3b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...