./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_3_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G --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 cdcc8697c8b9bd3a25c95b335058fb611b45ef6a0bd08057dccc283c9b370e3d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:36:10,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:36:10,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:36:10,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:36:10,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:36:10,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:36:10,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:36:10,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:36:10,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:36:10,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:36:10,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:36:10,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:36:10,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:36:10,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:36:10,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:36:10,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:36:10,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:36:10,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:36:10,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:36:10,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:36:10,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:36:10,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:36:10,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:36:10,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:36:10,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:36:10,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:36:10,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:36:10,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:36:10,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:36:10,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:36:10,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:36:10,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:36:10,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:36:10,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:36:10,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:36:10,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:36:10,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:36:10,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:36:10,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:36:10,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:36:10,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:36:10,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:36:10,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:36:10,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:36:10,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:36:10,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:36:10,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:36:10,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:36:10,379 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:36:10,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:36:10,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:36:10,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:36:10,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:36:10,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:36:10,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:36:10,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:36:10,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:36:10,382 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:36:10,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:36:10,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:36:10,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:36:10,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:36:10,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:36:10,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:36:10,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:36:10,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:36:10,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:36:10,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:36:10,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:36:10,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:36:10,385 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:36:10,385 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:36:10,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:36:10,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:36:10,386 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdcc8697c8b9bd3a25c95b335058fb611b45ef6a0bd08057dccc283c9b370e3d [2021-11-23 12:36:10,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:36:10,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:36:10,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:36:10,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:36:10,702 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:36:10,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/gcd_3+newton_3_4.i [2021-11-23 12:36:10,788 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data/e91702b76/97ae5474309e4ae79395b67fa9f68c22/FLAG60b000ab3 [2021-11-23 12:36:11,358 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:36:11,363 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i [2021-11-23 12:36:11,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data/e91702b76/97ae5474309e4ae79395b67fa9f68c22/FLAG60b000ab3 [2021-11-23 12:36:11,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data/e91702b76/97ae5474309e4ae79395b67fa9f68c22 [2021-11-23 12:36:11,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:36:11,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:36:11,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:36:11,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:36:11,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:36:11,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:36:11" (1/1) ... [2021-11-23 12:36:11,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da1f628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:11, skipping insertion in model container [2021-11-23 12:36:11,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:36:11" (1/1) ... [2021-11-23 12:36:11,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:36:11,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:36:11,953 WARN L230 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i[1226,1239] [2021-11-23 12:36:12,033 WARN L230 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i[2862,2875] [2021-11-23 12:36:12,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:36:12,061 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:36:12,086 WARN L230 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i[1226,1239] [2021-11-23 12:36:12,116 WARN L230 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i[2862,2875] [2021-11-23 12:36:12,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:36:12,146 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:36:12,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12 WrapperNode [2021-11-23 12:36:12,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:36:12,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:36:12,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:36:12,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:36:12,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,223 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 100 [2021-11-23 12:36:12,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:36:12,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:36:12,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:36:12,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:36:12,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:36:12,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:36:12,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:36:12,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:36:12,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (1/1) ... [2021-11-23 12:36:12,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:36:12,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:36:12,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:36:12,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:36:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:36:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:36:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:36:12,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:36:12,459 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:36:12,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:36:12,633 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:36:12,639 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:36:12,639 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 12:36:12,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:36:12 BoogieIcfgContainer [2021-11-23 12:36:12,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:36:12,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:36:12,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:36:12,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:36:12,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:36:11" (1/3) ... [2021-11-23 12:36:12,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a59eefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:36:12, skipping insertion in model container [2021-11-23 12:36:12,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:12" (2/3) ... [2021-11-23 12:36:12,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a59eefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:36:12, skipping insertion in model container [2021-11-23 12:36:12,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:36:12" (3/3) ... [2021-11-23 12:36:12,650 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_4.i [2021-11-23 12:36:12,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:36:12,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 12:36:12,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:36:12,731 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 [2021-11-23 12:36:12,732 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 12:36:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-11-23 12:36:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:36:12,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:12,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:36:12,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:12,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1947301547, now seen corresponding path program 1 times [2021-11-23 12:36:12,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:12,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022846527] [2021-11-23 12:36:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:12,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:36:13,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:13,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022846527] [2021-11-23 12:36:13,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022846527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:13,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:13,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:36:13,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782530222] [2021-11-23 12:36:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:13,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:36:13,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:13,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:36:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:36:13,084 INFO L87 Difference]: Start difference. First operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-23 12:36:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:13,179 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-23 12:36:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:36:13,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:36:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:13,192 INFO L225 Difference]: With dead ends: 78 [2021-11-23 12:36:13,192 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:36:13,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:36:13,201 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:36:13,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:36:13,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:36:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-11-23 12:36:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:36:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-23 12:36:13,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-11-23 12:36:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:13,259 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-23 12:36:13,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-23 12:36:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-23 12:36:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:36:13,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:13,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:36:13,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:36:13,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:13,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1538319123, now seen corresponding path program 1 times [2021-11-23 12:36:13,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:13,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317449399] [2021-11-23 12:36:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:13,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:36:13,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317449399] [2021-11-23 12:36:13,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317449399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:13,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:13,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:36:13,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954559571] [2021-11-23 12:36:13,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:13,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:36:13,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:13,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:36:13,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:36:13,412 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-23 12:36:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:13,478 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-23 12:36:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:36:13,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:36:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:13,480 INFO L225 Difference]: With dead ends: 30 [2021-11-23 12:36:13,480 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 12:36:13,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:36:13,483 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:36:13,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 90 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 12:36:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 12:36:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:36:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-23 12:36:13,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2021-11-23 12:36:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:13,490 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-23 12:36:13,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-23 12:36:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-23 12:36:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:36:13,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:13,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:36:13,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:36:13,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2044545692, now seen corresponding path program 1 times [2021-11-23 12:36:13,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:13,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536257936] [2021-11-23 12:36:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:13,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:13,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:36:13,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498441817] [2021-11-23 12:36:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:13,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:36:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:36:13,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:36:13,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:36:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 12:36:13,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:36:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:36:39,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:36:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:36:43,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536257936] [2021-11-23 12:36:43,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:36:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498441817] [2021-11-23 12:36:43,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498441817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:36:43,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:36:43,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-23 12:36:43,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340599772] [2021-11-23 12:36:43,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:36:43,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 12:36:43,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:43,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 12:36:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=176, Unknown=11, NotChecked=0, Total=240 [2021-11-23 12:36:43,643 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-11-23 12:36:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:43,968 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-23 12:36:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 12:36:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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) Word has length 12 [2021-11-23 12:36:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:43,972 INFO L225 Difference]: With dead ends: 37 [2021-11-23 12:36:43,972 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 12:36:43,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=62, Invalid=199, Unknown=11, NotChecked=0, Total=272 [2021-11-23 12:36:43,974 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:36:43,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-23 12:36:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 12:36:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-11-23 12:36:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.125) internal successors, (27), 25 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) [2021-11-23 12:36:43,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-23 12:36:43,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 12 [2021-11-23 12:36:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:43,980 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-23 12:36:43,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-11-23 12:36:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-23 12:36:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:36:43,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:43,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:36:44,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:36:44,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:36:44,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:44,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1277269317, now seen corresponding path program 1 times [2021-11-23 12:36:44,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:44,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833568261] [2021-11-23 12:36:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:44,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:36:44,227 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:36:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:36:44,264 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:36:44,264 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 12:36:44,265 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 12:36:44,267 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 12:36:44,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:36:44,271 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-23 12:36:44,274 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 12:36:44,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:36:44 BoogieIcfgContainer [2021-11-23 12:36:44,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 12:36:44,305 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 12:36:44,305 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 12:36:44,306 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 12:36:44,306 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:36:12" (3/4) ... [2021-11-23 12:36:44,308 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 12:36:44,309 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 12:36:44,309 INFO L158 Benchmark]: Toolchain (without parser) took 32586.80ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 50.0MB in the beginning and 38.0MB in the end (delta: 12.0MB). Peak memory consumption was 30.0MB. Max. memory is 16.1GB. [2021-11-23 12:36:44,310 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 88.1MB. Free memory was 66.0MB in the beginning and 66.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:36:44,310 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.81ms. Allocated memory is still 88.1MB. Free memory was 49.9MB in the beginning and 62.7MB in the end (delta: -12.8MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-23 12:36:44,311 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.83ms. Allocated memory is still 88.1MB. Free memory was 62.7MB in the beginning and 60.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:36:44,311 INFO L158 Benchmark]: Boogie Preprocessor took 52.17ms. Allocated memory is still 88.1MB. Free memory was 60.7MB in the beginning and 59.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:36:44,311 INFO L158 Benchmark]: RCFGBuilder took 364.32ms. Allocated memory is still 88.1MB. Free memory was 59.2MB in the beginning and 48.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 12:36:44,312 INFO L158 Benchmark]: TraceAbstraction took 31661.64ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 48.1MB in the beginning and 38.0MB in the end (delta: 10.1MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. [2021-11-23 12:36:44,312 INFO L158 Benchmark]: Witness Printer took 3.30ms. Allocated memory is still 107.0MB. Free memory is still 38.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:36:44,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 88.1MB. Free memory was 66.0MB in the beginning and 66.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.81ms. Allocated memory is still 88.1MB. Free memory was 49.9MB in the beginning and 62.7MB in the end (delta: -12.8MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.83ms. Allocated memory is still 88.1MB. Free memory was 62.7MB in the beginning and 60.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.17ms. Allocated memory is still 88.1MB. Free memory was 60.7MB in the beginning and 59.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 364.32ms. Allocated memory is still 88.1MB. Free memory was 59.2MB in the beginning and 48.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 31661.64ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 48.1MB in the beginning and 38.0MB in the end (delta: 10.1MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. * Witness Printer took 3.30ms. Allocated memory is still 107.0MB. Free memory is still 38.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 102]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 91, overapproximation of someBinaryDOUBLEComparisonOperation at line 101, overapproximation of someBinaryArithmeticFLOAToperation at line 97. Possible FailurePath: [L108] COND FALSE !(__VERIFIER_nondet_int()) [L111] CALL main2() [L90] float IN = __VERIFIER_nondet_float(); [L91] CALL assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L75] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L91] RET assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L93] CALL, EXPR f(IN) [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=49, x=49] [L93] RET, EXPR f(IN) [L93] CALL, EXPR fp(IN) [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=49, x=49] [L93] RET, EXPR fp(IN) [L93] float x = IN - f(IN)/fp(IN); [L95] CALL, EXPR f(x) [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=52, x=52] [L95] RET, EXPR f(x) [L95] CALL, EXPR fp(x) [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=52, x=52] [L95] RET, EXPR fp(x) [L95] x = x - f(x)/fp(x) [L97] CALL, EXPR f(x) [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=51, x=51] [L97] RET, EXPR f(x) [L97] CALL, EXPR fp(x) [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=51, x=51] [L97] RET, EXPR fp(x) [L97] x = x - f(x)/fp(x) [L101] COND TRUE !(x < 0.1) VAL [IN=49] [L102] reach_error() VAL [IN=49] - UnprovableResult [Line: 27]: 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, 31 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 31.6s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 291 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14 IncrementalHoareTripleChecker+Unchecked, 217 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 71 IncrementalHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 74 mSDtfsCounter, 71 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 28.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 30.3s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 4 QuantifiedInterpolants, 339 SizeOfPredicates, 10 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 12:36:44,532 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-23 12:36:44,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G --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 cdcc8697c8b9bd3a25c95b335058fb611b45ef6a0bd08057dccc283c9b370e3d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:36:46,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:36:46,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:36:46,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:36:46,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:36:46,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:36:46,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:36:46,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:36:46,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:36:46,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:36:46,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:36:46,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:36:46,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:36:46,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:36:46,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:36:46,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:36:46,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:36:46,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:36:46,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:36:46,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:36:46,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:36:46,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:36:46,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:36:46,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:36:46,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:36:46,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:36:46,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:36:46,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:36:46,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:36:46,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:36:46,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:36:46,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:36:46,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:36:46,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:36:46,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:36:46,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:36:46,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:36:46,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:36:46,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:36:46,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:36:46,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:36:46,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-23 12:36:46,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:36:46,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:36:46,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:36:46,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:36:46,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:36:46,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:36:46,879 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:36:46,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:36:46,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:36:46,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:36:46,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:36:46,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:36:46,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:36:46,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:36:46,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:36:46,882 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 12:36:46,882 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 12:36:46,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:36:46,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:36:46,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:36:46,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:36:46,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:36:46,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:36:46,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:36:46,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:36:46,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:36:46,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:36:46,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:36:46,886 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 12:36:46,886 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 12:36:46,886 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:36:46,887 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:36:46,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:36:46,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:36:46,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 12:36:46,888 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdcc8697c8b9bd3a25c95b335058fb611b45ef6a0bd08057dccc283c9b370e3d [2021-11-23 12:36:47,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:36:47,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:36:47,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:36:47,349 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:36:47,350 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:36:47,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/gcd_3+newton_3_4.i [2021-11-23 12:36:47,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data/d51cf37ec/461a03ca7b0a4762ac9043d6642bb88d/FLAGc77999e7f [2021-11-23 12:36:48,006 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:36:48,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i [2021-11-23 12:36:48,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data/d51cf37ec/461a03ca7b0a4762ac9043d6642bb88d/FLAGc77999e7f [2021-11-23 12:36:48,334 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/data/d51cf37ec/461a03ca7b0a4762ac9043d6642bb88d [2021-11-23 12:36:48,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:36:48,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:36:48,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:36:48,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:36:48,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:36:48,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46632944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48, skipping insertion in model container [2021-11-23 12:36:48,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:36:48,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:36:48,544 WARN L230 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i[1226,1239] [2021-11-23 12:36:48,617 WARN L230 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i[2862,2875] [2021-11-23 12:36:48,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:36:48,644 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:36:48,657 WARN L230 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i[1226,1239] [2021-11-23 12:36:48,671 WARN L230 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_f393d3d6-1cb7-42dd-bbff-b94ec8712343/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i[2862,2875] [2021-11-23 12:36:48,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:36:48,690 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:36:48,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48 WrapperNode [2021-11-23 12:36:48,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:36:48,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:36:48,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:36:48,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:36:48,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,759 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 95 [2021-11-23 12:36:48,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:36:48,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:36:48,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:36:48,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:36:48,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:36:48,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:36:48,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:36:48,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:36:48,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (1/1) ... [2021-11-23 12:36:48,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:36:48,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:36:48,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:36:48,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:36:48,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:36:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 12:36:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:36:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:36:48,977 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:36:48,979 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:37:02,453 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:37:02,459 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:37:02,459 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 12:37:02,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:37:02 BoogieIcfgContainer [2021-11-23 12:37:02,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:37:02,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:37:02,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:37:02,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:37:02,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:36:48" (1/3) ... [2021-11-23 12:37:02,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edd3de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:37:02, skipping insertion in model container [2021-11-23 12:37:02,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:48" (2/3) ... [2021-11-23 12:37:02,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edd3de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:37:02, skipping insertion in model container [2021-11-23 12:37:02,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:37:02" (3/3) ... [2021-11-23 12:37:02,469 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_4.i [2021-11-23 12:37:02,475 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:37:02,475 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 12:37:02,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:37:02,531 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 [2021-11-23 12:37:02,532 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 12:37:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-11-23 12:37:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:37:02,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:02,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:02,553 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1947301547, now seen corresponding path program 1 times [2021-11-23 12:37:02,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:37:02,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564632334] [2021-11-23 12:37:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:02,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:37:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:37:02,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:37:02,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 12:37:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:02,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:37:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:37:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:03,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:37:03,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564632334] [2021-11-23 12:37:03,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564632334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:37:03,305 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:37:03,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 12:37:03,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138921446] [2021-11-23 12:37:03,308 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:37:03,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:37:03,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:37:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:37:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:37:03,354 INFO L87 Difference]: Start difference. First operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:03,692 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2021-11-23 12:37:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:37:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:37:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:03,700 INFO L225 Difference]: With dead ends: 88 [2021-11-23 12:37:03,700 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:37:03,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:37:03,706 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 39 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:03,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 149 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:37:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:37:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-11-23 12:37:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-23 12:37:03,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-11-23 12:37:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:03,741 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-23 12:37:03,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-23 12:37:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:37:03,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:03,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:03,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:03,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:37:03,956 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1538319123, now seen corresponding path program 1 times [2021-11-23 12:37:03,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:37:03,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056586400] [2021-11-23 12:37:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:03,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:37:03,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:37:03,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:37:03,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 12:37:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:03,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:37:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:04,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:37:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:05,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:37:05,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056586400] [2021-11-23 12:37:05,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056586400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:37:05,412 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:37:05,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-23 12:37:05,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295151386] [2021-11-23 12:37:05,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:37:05,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 12:37:05,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:37:05,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 12:37:05,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:37:05,415 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2021-11-23 12:37:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:06,314 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-23 12:37:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:37:06,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:37:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:06,317 INFO L225 Difference]: With dead ends: 30 [2021-11-23 12:37:06,317 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 12:37:06,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:37:06,320 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:06,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 142 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:37:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 12:37:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 12:37:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-23 12:37:06,327 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2021-11-23 12:37:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:06,327 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-23 12:37:06,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2021-11-23 12:37:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-23 12:37:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:37:06,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:06,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:06,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:06,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:37:06,542 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2044545692, now seen corresponding path program 1 times [2021-11-23 12:37:06,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:37:06,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676981982] [2021-11-23 12:37:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:06,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:37:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:37:06,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:37:06,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 12:37:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 12:37:06,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:11,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:37:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:20,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:37:20,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676981982] [2021-11-23 12:37:20,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676981982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:37:20,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:37:20,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-23 12:37:20,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239592754] [2021-11-23 12:37:20,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:37:20,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 12:37:20,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:37:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 12:37:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-23 12:37:20,280 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-11-23 12:37:26,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:37:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:44,942 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-23 12:37:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 12:37:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) Word has length 12 [2021-11-23 12:37:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:44,949 INFO L225 Difference]: With dead ends: 38 [2021-11-23 12:37:44,949 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 12:37:44,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=156, Invalid=492, Unknown=2, NotChecked=0, Total=650 [2021-11-23 12:37:44,952 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:44,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 23 Unchecked, 4.7s Time] [2021-11-23 12:37:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 12:37:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-23 12:37:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-23 12:37:44,959 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2021-11-23 12:37:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:44,959 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-23 12:37:44,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-11-23 12:37:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-23 12:37:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:37:44,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:44,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:44,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:45,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:37:45,164 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:45,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1277269317, now seen corresponding path program 1 times [2021-11-23 12:37:45,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:37:45,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551996372] [2021-11-23 12:37:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:45,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:37:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:37:45,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:37:45,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f393d3d6-1cb7-42dd-bbff-b94ec8712343/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process