./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/gcd_4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 9c20edfd7ede05443471560aa2c7be34d4e8c171 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 19:56:41,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:56:41,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:56:41,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:56:41,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:56:41,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:56:41,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:56:41,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:56:41,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:56:41,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:56:41,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:56:41,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:56:41,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:56:41,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:56:41,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:56:41,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:56:41,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:56:41,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:56:41,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:56:41,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:56:41,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:56:41,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:56:41,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:56:41,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:56:41,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:56:41,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:56:41,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:56:41,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:56:41,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:56:41,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:56:41,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:56:41,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:56:41,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:56:41,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:56:41,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:56:41,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:56:41,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:56:41,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:56:41,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:56:41,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:56:41,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:56:41,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:56:41,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:56:41,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:56:41,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:56:41,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:56:41,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:56:41,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:56:41,313 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:56:41,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:56:41,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:56:41,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:56:41,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:56:41,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:56:41,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:56:41,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:56:41,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:56:41,315 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:56:41,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:56:41,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:56:41,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:56:41,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:56:41,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:56:41,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:56:41,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:56:41,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:56:41,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:56:41,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:56:41,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:56:41,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:56:41,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:56:41,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:56:41,317 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2021-08-25 19:56:41,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:56:41,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:56:41,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:56:41,567 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:56:41,567 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:56:41,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_4.c [2021-08-25 19:56:41,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2911057/92ba81c41f4d4aa1888b933af7729df0/FLAGa325476d6 [2021-08-25 19:56:41,994 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:56:41,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c [2021-08-25 19:56:42,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2911057/92ba81c41f4d4aa1888b933af7729df0/FLAGa325476d6 [2021-08-25 19:56:42,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2911057/92ba81c41f4d4aa1888b933af7729df0 [2021-08-25 19:56:42,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:56:42,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:56:42,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:56:42,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:56:42,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:56:42,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e52647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42, skipping insertion in model container [2021-08-25 19:56:42,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:56:42,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:56:42,164 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-08-25 19:56:42,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:56:42,180 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:56:42,188 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-08-25 19:56:42,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:56:42,206 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:56:42,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42 WrapperNode [2021-08-25 19:56:42,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:56:42,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:56:42,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:56:42,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:56:42,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:56:42,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:56:42,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:56:42,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:56:42,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:56:42,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:56:42,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:56:42,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:56:42,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (1/1) ... [2021-08-25 19:56:42,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:56:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:42,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 19:56:42,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 19:56:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:56:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:56:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:56:42,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:56:42,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:56:42,618 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-25 19:56:42,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:56:42 BoogieIcfgContainer [2021-08-25 19:56:42,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:56:42,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:56:42,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:56:42,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:56:42,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:56:42" (1/3) ... [2021-08-25 19:56:42,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656717b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:56:42, skipping insertion in model container [2021-08-25 19:56:42,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:56:42" (2/3) ... [2021-08-25 19:56:42,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656717b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:56:42, skipping insertion in model container [2021-08-25 19:56:42,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:56:42" (3/3) ... [2021-08-25 19:56:42,624 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2021-08-25 19:56:42,627 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:56:42,627 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-25 19:56:42,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:56:42,660 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 19:56:42,660 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-25 19:56:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-25 19:56:42,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:42,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:42,672 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash 121403650, now seen corresponding path program 1 times [2021-08-25 19:56:42,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:42,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099913404] [2021-08-25 19:56:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:42,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:56:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:56:42,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:42,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099913404] [2021-08-25 19:56:42,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099913404] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:56:42,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:56:42,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 19:56:42,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588322402] [2021-08-25 19:56:42,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 19:56:42,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 19:56:42,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 19:56:42,856 INFO L87 Difference]: Start difference. First operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:42,903 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-08-25 19:56:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 19:56:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-25 19:56:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:42,910 INFO L225 Difference]: With dead ends: 64 [2021-08-25 19:56:42,910 INFO L226 Difference]: Without dead ends: 35 [2021-08-25 19:56:42,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 19:56:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-25 19:56:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-08-25 19:56:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 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) [2021-08-25 19:56:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-25 19:56:42,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2021-08-25 19:56:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:42,934 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-25 19:56:42,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-25 19:56:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-25 19:56:42,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:42,935 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:42,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:56:42,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:42,938 INFO L82 PathProgramCache]: Analyzing trace with hash -60379342, now seen corresponding path program 1 times [2021-08-25 19:56:42,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:42,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813295459] [2021-08-25 19:56:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:42,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:56:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:56:42,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:42,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813295459] [2021-08-25 19:56:42,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813295459] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:56:42,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:56:42,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 19:56:42,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766303014] [2021-08-25 19:56:42,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 19:56:42,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 19:56:42,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 19:56:42,993 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:43,019 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-08-25 19:56:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 19:56:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-25 19:56:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:43,022 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:56:43,022 INFO L226 Difference]: Without dead ends: 22 [2021-08-25 19:56:43,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 19:56:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-25 19:56:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-25 19:56:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 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) [2021-08-25 19:56:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-25 19:56:43,027 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2021-08-25 19:56:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:43,028 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-25 19:56:43,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-08-25 19:56:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:56:43,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:43,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:43,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 19:56:43,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:43,031 INFO L82 PathProgramCache]: Analyzing trace with hash 108865487, now seen corresponding path program 1 times [2021-08-25 19:56:43,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:43,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199574094] [2021-08-25 19:56:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:43,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:43,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:43,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943751100] [2021-08-25 19:56:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:43,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:43,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:43,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:43,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:56:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:56:43,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:56:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:56:43,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:43,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199574094] [2021-08-25 19:56:43,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:43,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943751100] [2021-08-25 19:56:43,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943751100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:43,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:43,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-25 19:56:43,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357274099] [2021-08-25 19:56:43,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 19:56:43,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 19:56:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:56:43,313 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:43,336 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-08-25 19:56:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 19:56:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:56:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:43,337 INFO L225 Difference]: With dead ends: 39 [2021-08-25 19:56:43,337 INFO L226 Difference]: Without dead ends: 24 [2021-08-25 19:56:43,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:56:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-25 19:56:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-25 19:56:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-08-25 19:56:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-25 19:56:43,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2021-08-25 19:56:43,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:43,341 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-25 19:56:43,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-25 19:56:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:56:43,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:43,344 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:43,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-25 19:56:43,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:43,557 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash -326322836, now seen corresponding path program 1 times [2021-08-25 19:56:43,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:43,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260625724] [2021-08-25 19:56:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:43,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:43,568 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:43,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233715594] [2021-08-25 19:56:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:43,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:43,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:43,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:43,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 19:56:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:56:43,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 19:56:43,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:56:43,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:43,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260625724] [2021-08-25 19:56:43,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:43,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233715594] [2021-08-25 19:56:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233715594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:43,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:43,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 19:56:43,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75859217] [2021-08-25 19:56:43,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:56:43,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:43,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:56:43,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:56:43,763 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:43,800 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-08-25 19:56:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 19:56:43,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:56:43,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:43,801 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:56:43,801 INFO L226 Difference]: Without dead ends: 26 [2021-08-25 19:56:43,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:56:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-25 19:56:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-25 19:56:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 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) [2021-08-25 19:56:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-25 19:56:43,803 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2021-08-25 19:56:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:43,804 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-25 19:56:43,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-25 19:56:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:56:43,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:43,805 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:43,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:56:44,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-25 19:56:44,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1930473527, now seen corresponding path program 2 times [2021-08-25 19:56:44,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:44,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955443672] [2021-08-25 19:56:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:44,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:44,030 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:44,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676250338] [2021-08-25 19:56:44,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:56:44,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:44,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:44,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 19:56:44,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:56:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:56:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 19:56:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:56:44,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:44,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955443672] [2021-08-25 19:56:44,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:44,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676250338] [2021-08-25 19:56:44,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676250338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:44,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:44,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 19:56:44,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813981626] [2021-08-25 19:56:44,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 19:56:44,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 19:56:44,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:56:44,368 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:44,420 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-08-25 19:56:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 19:56:44,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:56:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:44,422 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:56:44,422 INFO L226 Difference]: Without dead ends: 28 [2021-08-25 19:56:44,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:56:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-25 19:56:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-25 19:56:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 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) [2021-08-25 19:56:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-25 19:56:44,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-08-25 19:56:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:44,425 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-25 19:56:44,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-25 19:56:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:56:44,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:44,426 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:44,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-25 19:56:44,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:44,643 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:44,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1626028314, now seen corresponding path program 3 times [2021-08-25 19:56:44,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:44,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113049677] [2021-08-25 19:56:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:44,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:44,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:44,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175288112] [2021-08-25 19:56:44,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:56:44,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:44,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:44,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:44,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 19:56:44,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-25 19:56:44,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:56:44,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 19:56:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:56:44,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:44,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113049677] [2021-08-25 19:56:44,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:44,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175288112] [2021-08-25 19:56:44,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175288112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:44,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:44,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:56:44,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165363551] [2021-08-25 19:56:44,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:56:44,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:56:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:56:44,876 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-08-25 19:56:44,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:44,906 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-08-25 19:56:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:56:44,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 19:56:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:44,908 INFO L225 Difference]: With dead ends: 47 [2021-08-25 19:56:44,908 INFO L226 Difference]: Without dead ends: 30 [2021-08-25 19:56:44,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:56:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-25 19:56:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-25 19:56:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-08-25 19:56:44,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2021-08-25 19:56:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:44,911 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-08-25 19:56:44,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-08-25 19:56:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-08-25 19:56:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:56:44,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:44,912 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:44,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:56:45,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:45,129 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:45,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1921301375, now seen corresponding path program 4 times [2021-08-25 19:56:45,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:45,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932662022] [2021-08-25 19:56:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:45,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:45,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:45,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363491541] [2021-08-25 19:56:45,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:56:45,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:45,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:45,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 19:56:45,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:56:45,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:56:45,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-25 19:56:45,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-25 19:56:45,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:45,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932662022] [2021-08-25 19:56:45,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:45,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363491541] [2021-08-25 19:56:45,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363491541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:45,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:45,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:56:45,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392991748] [2021-08-25 19:56:45,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:56:45,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:56:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:56:45,540 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:45,625 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-08-25 19:56:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:56:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:56:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:45,626 INFO L225 Difference]: With dead ends: 47 [2021-08-25 19:56:45,627 INFO L226 Difference]: Without dead ends: 45 [2021-08-25 19:56:45,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:56:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-25 19:56:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-08-25 19:56:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 35 states have internal predecessors, (40), 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) [2021-08-25 19:56:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-08-25 19:56:45,630 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2021-08-25 19:56:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:45,631 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-08-25 19:56:45,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-08-25 19:56:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:56:45,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:45,631 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:45,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-25 19:56:45,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:45,848 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:45,848 INFO L82 PathProgramCache]: Analyzing trace with hash 465472356, now seen corresponding path program 1 times [2021-08-25 19:56:45,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:45,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556382358] [2021-08-25 19:56:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:45,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:45,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:45,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137163052] [2021-08-25 19:56:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:45,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:45,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:45,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:45,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 19:56:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:56:45,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-25 19:56:45,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 19:56:46,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:46,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556382358] [2021-08-25 19:56:46,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:46,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137163052] [2021-08-25 19:56:46,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137163052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:46,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:46,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:56:46,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532397902] [2021-08-25 19:56:46,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:56:46,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:46,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:56:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:56:46,181 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2021-08-25 19:56:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:46,282 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-08-25 19:56:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:56:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 22 [2021-08-25 19:56:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:46,284 INFO L225 Difference]: With dead ends: 51 [2021-08-25 19:56:46,284 INFO L226 Difference]: Without dead ends: 40 [2021-08-25 19:56:46,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:56:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-25 19:56:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-08-25 19:56:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 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) [2021-08-25 19:56:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-08-25 19:56:46,287 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 22 [2021-08-25 19:56:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:46,287 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-08-25 19:56:46,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2021-08-25 19:56:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-08-25 19:56:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:56:46,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:46,288 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:46,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 19:56:46,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:46,505 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2084095836, now seen corresponding path program 5 times [2021-08-25 19:56:46,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:46,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925333590] [2021-08-25 19:56:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:46,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:46,513 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:46,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084449968] [2021-08-25 19:56:46,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 19:56:46,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:46,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:46,533 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:46,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 19:56:46,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-25 19:56:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:56:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 19:56:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:56:46,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:46,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925333590] [2021-08-25 19:56:46,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:46,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084449968] [2021-08-25 19:56:46,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084449968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:46,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:46,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:56:46,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777471540] [2021-08-25 19:56:46,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:56:46,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:46,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:56:46,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:56:46,838 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-08-25 19:56:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:46,911 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-08-25 19:56:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:56:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2021-08-25 19:56:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:46,913 INFO L225 Difference]: With dead ends: 54 [2021-08-25 19:56:46,913 INFO L226 Difference]: Without dead ends: 34 [2021-08-25 19:56:46,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:56:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-25 19:56:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-25 19:56:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 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) [2021-08-25 19:56:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-08-25 19:56:46,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 22 [2021-08-25 19:56:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:46,916 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-08-25 19:56:46,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-08-25 19:56:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-08-25 19:56:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:56:46,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:46,917 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:46,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:56:47,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:47,136 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:47,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2026837534, now seen corresponding path program 6 times [2021-08-25 19:56:47,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:47,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342059977] [2021-08-25 19:56:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:47,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:47,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:47,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989947321] [2021-08-25 19:56:47,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 19:56:47,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:47,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:47,176 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:47,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 19:56:47,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-25 19:56:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:56:47,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 19:56:47,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-25 19:56:47,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:47,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342059977] [2021-08-25 19:56:47,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:47,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989947321] [2021-08-25 19:56:47,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989947321] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:56:47,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:56:47,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 19:56:47,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776770699] [2021-08-25 19:56:47,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 19:56:47,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 19:56:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 19:56:47,350 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:47,356 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-08-25 19:56:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 19:56:47,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-25 19:56:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:47,358 INFO L225 Difference]: With dead ends: 48 [2021-08-25 19:56:47,358 INFO L226 Difference]: Without dead ends: 35 [2021-08-25 19:56:47,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 19:56:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-25 19:56:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-08-25 19:56:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-08-25 19:56:47,360 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2021-08-25 19:56:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:47,360 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-08-25 19:56:47,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-08-25 19:56:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:56:47,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:47,361 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:47,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 19:56:47,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-25 19:56:47,569 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1401524834, now seen corresponding path program 7 times [2021-08-25 19:56:47,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:47,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671129086] [2021-08-25 19:56:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:47,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:47,576 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:47,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485498001] [2021-08-25 19:56:47,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 19:56:47,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:47,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:47,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 19:56:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:56:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 19:56:47,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:56:47,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:47,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671129086] [2021-08-25 19:56:47,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:47,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485498001] [2021-08-25 19:56:47,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485498001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:47,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:47,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:56:47,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828652332] [2021-08-25 19:56:47,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:56:47,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:47,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:56:47,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:56:47,840 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-08-25 19:56:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:47,870 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-08-25 19:56:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:56:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-08-25 19:56:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:47,871 INFO L225 Difference]: With dead ends: 49 [2021-08-25 19:56:47,871 INFO L226 Difference]: Without dead ends: 33 [2021-08-25 19:56:47,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:56:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-25 19:56:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-25 19:56:47,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 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) [2021-08-25 19:56:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-25 19:56:47,874 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 22 [2021-08-25 19:56:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:47,874 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-25 19:56:47,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-08-25 19:56:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-25 19:56:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:56:47,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:56:47,875 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:56:47,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 19:56:48,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:48,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:56:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:56:48,091 INFO L82 PathProgramCache]: Analyzing trace with hash -505502279, now seen corresponding path program 8 times [2021-08-25 19:56:48,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:56:48,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305746853] [2021-08-25 19:56:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:56:48,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:56:48,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:56:48,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246404576] [2021-08-25 19:56:48,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:56:48,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:56:48,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:56:48,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:56:48,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 19:56:48,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:56:48,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:56:48,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-25 19:56:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:56:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:56:48,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:56:48,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305746853] [2021-08-25 19:56:48,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:56:48,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246404576] [2021-08-25 19:56:48,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246404576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:56:48,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:56:48,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 19:56:48,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126110692] [2021-08-25 19:56:48,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:56:48,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:56:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:56:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:56:48,524 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-08-25 19:56:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:56:48,656 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-08-25 19:56:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:56:48,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) Word has length 24 [2021-08-25 19:56:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:56:48,657 INFO L225 Difference]: With dead ends: 33 [2021-08-25 19:56:48,657 INFO L226 Difference]: Without dead ends: 0 [2021-08-25 19:56:48,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:56:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-25 19:56:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-25 19:56:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:56:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-25 19:56:48,658 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-08-25 19:56:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:56:48,658 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-25 19:56:48,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-08-25 19:56:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-25 19:56:48,658 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-25 19:56:48,660 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:56:48,660 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:56:48,660 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:56:48,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 19:56:48,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-25 19:56:48,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-25 19:56:48,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:56:48,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:56:48,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:56:48,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:56:48,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:56:48,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 19:56:49,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-08-25 19:56:49,132 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 13 29) no Hoare annotation was computed. [2021-08-25 19:56:49,132 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-08-25 19:56:49,132 INFO L853 garLoopResultBuilder]: At program point L7-2(lines 6 11) the Hoare annotation is: (let ((.cse0 (* 3 ULTIMATE.start_main_~y~0))) (and (= (+ ULTIMATE.start_main_~g~0 .cse0) 63) (= ULTIMATE.start_main_~y~0 18) (= (+ |ULTIMATE.start_gcd_test_#res| .cse0) 63) (= (+ ULTIMATE.start_gcd_test_~a .cse0) 63))) [2021-08-25 19:56:49,132 INFO L857 garLoopResultBuilder]: For program point L7-3(lines 7 9) no Hoare annotation was computed. [2021-08-25 19:56:49,132 INFO L853 garLoopResultBuilder]: At program point L7-5(lines 6 11) the Hoare annotation is: (let ((.cse0 (* 3 ULTIMATE.start_main_~y~0))) (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ ULTIMATE.start_main_~g~0 .cse0) 63) (= ULTIMATE.start_main_~y~0 18) (= (+ |ULTIMATE.start_gcd_test_#res| .cse0) 63) (= (+ ULTIMATE.start_gcd_test_~a .cse0) 63))) [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L7-6(lines 7 9) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L860 garLoopResultBuilder]: At program point L7-8(lines 6 11) the Hoare annotation is: true [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L853 garLoopResultBuilder]: At program point L28(lines 12 29) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_gcd_test_~a)) (.cse1 (* 3 ULTIMATE.start_main_~y~0))) (and (= ULTIMATE.start_main_~x~0 63) (= (+ ULTIMATE.start_gcd_test_~b .cse0) 18) (= (+ |ULTIMATE.start_gcd_test_#res| .cse1) 63) (= 18 .cse0) (= (+ ULTIMATE.start_gcd_test_~a .cse1) 63))) [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L8-2(line 8) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L853 garLoopResultBuilder]: At program point L22-2(lines 21 27) the Hoare annotation is: (let ((.cse1 (= ULTIMATE.start_gcd_test_~b 18)) (.cse4 (+ ULTIMATE.start_gcd_test_~b ULTIMATE.start_gcd_test_~a)) (.cse0 (= ULTIMATE.start_main_~x~0 63)) (.cse3 (= ULTIMATE.start_main_~y~0 18)) (.cse5 (= (+ ULTIMATE.start_gcd_test_~a (* 3 ULTIMATE.start_main_~y~0)) 63))) (or (let ((.cse2 (+ ULTIMATE.start_gcd_test_~a (* 2 ULTIMATE.start_gcd_test_~b)))) (and .cse0 .cse1 (<= 63 .cse2) (<= .cse2 63) .cse3)) (and .cse0 .cse1 (<= 63 .cse4) .cse3 (<= .cse4 63)) (and .cse0 .cse1 .cse3 (<= ULTIMATE.start_gcd_test_~a 63) (<= 63 ULTIMATE.start_gcd_test_~a)) (and .cse0 (= (+ ULTIMATE.start_gcd_test_~b (* 2 ULTIMATE.start_gcd_test_~a)) 18) .cse3 .cse5) (and .cse0 .cse3 .cse5 (<= 18 .cse4) (<= .cse4 18)) (and .cse0 (<= 18 ULTIMATE.start_gcd_test_~b) .cse3 .cse5 (<= (+ ULTIMATE.start_gcd_test_~a (* 3 ULTIMATE.start_gcd_test_~b)) 63)))) [2021-08-25 19:56:49,133 INFO L860 garLoopResultBuilder]: At program point L47(lines 32 48) the Hoare annotation is: true [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2021-08-25 19:56:49,133 INFO L857 garLoopResultBuilder]: For program point L14-2(lines 13 29) no Hoare annotation was computed. [2021-08-25 19:56:49,136 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:56:49,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:56:49 BoogieIcfgContainer [2021-08-25 19:56:49,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:56:49,160 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:56:49,160 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:56:49,160 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:56:49,161 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:56:42" (3/4) ... [2021-08-25 19:56:49,163 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-25 19:56:49,170 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-08-25 19:56:49,170 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-25 19:56:49,170 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 19:56:49,170 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 19:56:49,188 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == 63 && b + 2 * a == 18) && \result + 3 * y == 63) && 18 == 2 * a) && a + 3 * y == 63 [2021-08-25 19:56:49,188 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((g + 3 * y == 63 && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 [2021-08-25 19:56:49,188 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((1 <= cond && g + 3 * y == 63) && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 [2021-08-25 19:56:49,199 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 19:56:49,199 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:56:49,201 INFO L168 Benchmark]: Toolchain (without parser) took 7168.84 ms. Allocated memory was 79.7 MB in the beginning and 151.0 MB in the end (delta: 71.3 MB). Free memory was 62.8 MB in the beginning and 66.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 68.0 MB. Max. memory is 16.1 GB. [2021-08-25 19:56:49,201 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 79.7 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:56:49,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.12 ms. Allocated memory is still 79.7 MB. Free memory was 62.6 MB in the beginning and 53.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:56:49,202 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.55 ms. Allocated memory is still 79.7 MB. Free memory was 53.0 MB in the beginning and 62.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:56:49,202 INFO L168 Benchmark]: Boogie Preprocessor took 26.52 ms. Allocated memory is still 79.7 MB. Free memory was 62.1 MB in the beginning and 61.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:56:49,202 INFO L168 Benchmark]: RCFGBuilder took 323.38 ms. Allocated memory is still 79.7 MB. Free memory was 60.8 MB in the beginning and 47.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:56:49,202 INFO L168 Benchmark]: TraceAbstraction took 6539.29 ms. Allocated memory was 79.7 MB in the beginning and 151.0 MB in the end (delta: 71.3 MB). Free memory was 46.8 MB in the beginning and 68.6 MB in the end (delta: -21.8 MB). Peak memory consumption was 50.7 MB. Max. memory is 16.1 GB. [2021-08-25 19:56:49,202 INFO L168 Benchmark]: Witness Printer took 39.44 ms. Allocated memory is still 151.0 MB. Free memory was 68.6 MB in the beginning and 66.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:56:49,204 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 79.7 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 175.12 ms. Allocated memory is still 79.7 MB. Free memory was 62.6 MB in the beginning and 53.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.55 ms. Allocated memory is still 79.7 MB. Free memory was 53.0 MB in the beginning and 62.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.52 ms. Allocated memory is still 79.7 MB. Free memory was 62.1 MB in the beginning and 61.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 323.38 ms. Allocated memory is still 79.7 MB. Free memory was 60.8 MB in the beginning and 47.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6539.29 ms. Allocated memory was 79.7 MB in the beginning and 151.0 MB in the end (delta: 71.3 MB). Free memory was 46.8 MB in the beginning and 68.6 MB in the end (delta: -21.8 MB). Peak memory consumption was 50.7 MB. Max. memory is 16.1 GB. * Witness Printer took 39.44 ms. Allocated memory is still 151.0 MB. Free memory was 68.6 MB in the beginning and 66.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 6481.4ms, OverallIterations: 12, TraceHistogramMax: 7, EmptinessCheckTime: 10.6ms, AutomataDifference: 708.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 254.5ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 174 SDtfs, 113 SDslu, 425 SDs, 0 SdLazy, 524 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 309.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 205 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 494.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=8, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40.7ms AutomataMinimizationTime, 12 MinimizatonAttempts, 28 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 19 NumberOfFragments, 215 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 47.1ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 185 FormulaSimplificationTreeSizeReductionInter, 202.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 69.7ms SsaConstructionTime, 205.7ms SatisfiabilityAnalysisTime, 1810.4ms InterpolantComputationTime, 210 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 198 ConstructedInterpolants, 1 QuantifiedInterpolants, 1213 SizeOfPredicates, 56 NumberOfNonLiveVariables, 787 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 96/237 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: (((1 <= cond && g + 3 * y == 63) && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: ((g + 3 * y == 63 && y == 18) && \result + 3 * y == 63) && a + 3 * y == 63 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: (((x == 63 && b + 2 * a == 18) && \result + 3 * y == 63) && 18 == 2 * a) && a + 3 * y == 63 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((((x == 63 && b == 18) && 63 <= a + 2 * b) && a + 2 * b <= 63) && y == 18) || ((((x == 63 && b == 18) && 63 <= b + a) && y == 18) && b + a <= 63)) || ((((x == 63 && b == 18) && y == 18) && a <= 63) && 63 <= a)) || (((x == 63 && b + 2 * a == 18) && y == 18) && a + 3 * y == 63)) || ((((x == 63 && y == 18) && a + 3 * y == 63) && 18 <= b + a) && b + a <= 18)) || ((((x == 63 && 18 <= b) && y == 18) && a + 3 * y == 63) && a + 3 * b <= 63) RESULT: Ultimate proved your program to be correct! [2021-08-25 19:56:49,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...