./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/reducercommutativity/rangesum05.i -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 0bbcd29b379466a58e055ac550736cd77ce56d9c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 19:03:46,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:03:46,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:03:46,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:03:46,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:03:46,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:03:46,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:03:46,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:03:46,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:03:46,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:03:46,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:03:46,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:03:46,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:03:46,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:03:46,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:03:46,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:03:46,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:03:46,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:03:46,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:03:46,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:03:46,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:03:46,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:03:46,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:03:46,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:03:46,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:03:46,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:03:46,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:03:46,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:03:46,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:03:46,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:03:46,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:03:46,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:03:46,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:03:46,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:03:46,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:03:46,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:03:46,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:03:46,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:03:46,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:03:46,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:03:46,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:03:46,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:03:46,402 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:03:46,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:03:46,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:03:46,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:03:46,404 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:03:46,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:03:46,405 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:03:46,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:03:46,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:03:46,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:03:46,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:03:46,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:03:46,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:03:46,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:03:46,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:03:46,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:03:46,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:03:46,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:03:46,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:03:46,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:03:46,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:03:46,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:03:46,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:03:46,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:03:46,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:03:46,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:03:46,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:03:46,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:03:46,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:03:46,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2020-10-25 19:03:46,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:03:46,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:03:46,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:03:46,834 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:03:46,835 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:03:46,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-10-25 19:03:46,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58699fbb/7a164f7ac34f40708f7ec4bd835c7aa7/FLAG3d7bcc6a2 [2020-10-25 19:03:47,586 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:03:47,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-10-25 19:03:47,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58699fbb/7a164f7ac34f40708f7ec4bd835c7aa7/FLAG3d7bcc6a2 [2020-10-25 19:03:47,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58699fbb/7a164f7ac34f40708f7ec4bd835c7aa7 [2020-10-25 19:03:47,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:03:47,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:03:47,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:03:47,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:03:47,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:03:47,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:03:47" (1/1) ... [2020-10-25 19:03:47,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3866c13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:47, skipping insertion in model container [2020-10-25 19:03:47,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:03:47" (1/1) ... [2020-10-25 19:03:47,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:03:47,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:03:48,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:03:48,247 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:03:48,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:03:48,293 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:03:48,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48 WrapperNode [2020-10-25 19:03:48,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:03:48,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:03:48,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:03:48,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:03:48,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:03:48,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:03:48,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:03:48,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:03:48,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:03:48,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:03:48,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:03:48,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:03:48,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:03:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:03:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:03:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:03:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:03:48,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:03:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:03:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 19:03:48,884 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:03:48,885 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-10-25 19:03:48,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:03:48 BoogieIcfgContainer [2020-10-25 19:03:48,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:03:48,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:03:48,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:03:48,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:03:48,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:03:47" (1/3) ... [2020-10-25 19:03:48,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7347a838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:03:48, skipping insertion in model container [2020-10-25 19:03:48,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (2/3) ... [2020-10-25 19:03:48,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7347a838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:03:48, skipping insertion in model container [2020-10-25 19:03:48,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:03:48" (3/3) ... [2020-10-25 19:03:48,898 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-10-25 19:03:48,913 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:03:48,919 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:03:48,934 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:03:48,994 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:03:48,995 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:03:48,995 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:03:48,995 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:03:48,995 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:03:48,996 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:03:48,996 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:03:48,996 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:03:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-25 19:03:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:03:49,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:49,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:49,029 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1570593938, now seen corresponding path program 1 times [2020-10-25 19:03:49,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:49,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715799934] [2020-10-25 19:03:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:03:49,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715799934] [2020-10-25 19:03:49,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:03:49,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:03:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77415430] [2020-10-25 19:03:49,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:03:49,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:49,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:03:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:03:49,351 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-25 19:03:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:49,380 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-10-25 19:03:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:03:49,381 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-10-25 19:03:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:49,390 INFO L225 Difference]: With dead ends: 58 [2020-10-25 19:03:49,391 INFO L226 Difference]: Without dead ends: 27 [2020-10-25 19:03:49,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:03:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-25 19:03:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-25 19:03:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-25 19:03:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-25 19:03:49,435 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2020-10-25 19:03:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:49,435 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-25 19:03:49,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:03:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-25 19:03:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:03:49,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:49,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:49,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:03:49,438 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:49,439 INFO L82 PathProgramCache]: Analyzing trace with hash 813479325, now seen corresponding path program 1 times [2020-10-25 19:03:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:49,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926974152] [2020-10-25 19:03:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:49,457 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:49,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868663399] [2020-10-25 19:03:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:49,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 19:03:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:03:49,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926974152] [2020-10-25 19:03:49,621 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:49,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868663399] [2020-10-25 19:03:49,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:03:49,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:03:49,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731447710] [2020-10-25 19:03:49,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:03:49,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:03:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:03:49,627 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-10-25 19:03:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:49,648 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-10-25 19:03:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:03:49,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-25 19:03:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:49,650 INFO L225 Difference]: With dead ends: 52 [2020-10-25 19:03:49,651 INFO L226 Difference]: Without dead ends: 29 [2020-10-25 19:03:49,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:03:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-25 19:03:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-25 19:03:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 19:03:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-25 19:03:49,659 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 18 [2020-10-25 19:03:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:49,660 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-25 19:03:49,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:03:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-25 19:03:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:03:49,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:49,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:49,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 19:03:49,876 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:49,878 INFO L82 PathProgramCache]: Analyzing trace with hash -552235489, now seen corresponding path program 1 times [2020-10-25 19:03:49,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:49,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473068377] [2020-10-25 19:03:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:03:49,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473068377] [2020-10-25 19:03:49,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911319332] [2020-10-25 19:03:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 19:03:50,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-25 19:03:50,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:50,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-25 19:03:50,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341909453] [2020-10-25 19:03:50,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:03:50,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:03:50,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:50,060 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-10-25 19:03:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:50,115 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-10-25 19:03:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:03:50,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-25 19:03:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:50,117 INFO L225 Difference]: With dead ends: 59 [2020-10-25 19:03:50,117 INFO L226 Difference]: Without dead ends: 37 [2020-10-25 19:03:50,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-25 19:03:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-25 19:03:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-25 19:03:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-25 19:03:50,125 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2020-10-25 19:03:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:50,125 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-25 19:03:50,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:03:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-25 19:03:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-25 19:03:50,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:50,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:50,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:50,343 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:50,344 INFO L82 PathProgramCache]: Analyzing trace with hash -745215302, now seen corresponding path program 1 times [2020-10-25 19:03:50,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:50,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836020947] [2020-10-25 19:03:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-25 19:03:50,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836020947] [2020-10-25 19:03:50,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254618301] [2020-10-25 19:03:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 19:03:50,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 19:03:50,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:50,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-25 19:03:50,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167106530] [2020-10-25 19:03:50,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:03:50,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:50,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:03:50,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:50,501 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-10-25 19:03:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:50,518 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-25 19:03:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:03:50,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-25 19:03:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:50,520 INFO L225 Difference]: With dead ends: 48 [2020-10-25 19:03:50,520 INFO L226 Difference]: Without dead ends: 36 [2020-10-25 19:03:50,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-25 19:03:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-25 19:03:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-25 19:03:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-25 19:03:50,527 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2020-10-25 19:03:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:50,528 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-25 19:03:50,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:03:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-25 19:03:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 19:03:50,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:50,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:50,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:50,743 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:50,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1253041416, now seen corresponding path program 1 times [2020-10-25 19:03:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:50,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685221708] [2020-10-25 19:03:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 19:03:50,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685221708] [2020-10-25 19:03:50,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198404385] [2020-10-25 19:03:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 19:03:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-25 19:03:50,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:50,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-25 19:03:50,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235594953] [2020-10-25 19:03:50,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:03:50,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:03:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:50,910 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 3 states. [2020-10-25 19:03:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:51,215 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2020-10-25 19:03:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:03:51,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-25 19:03:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:51,219 INFO L225 Difference]: With dead ends: 81 [2020-10-25 19:03:51,219 INFO L226 Difference]: Without dead ends: 58 [2020-10-25 19:03:51,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-25 19:03:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-25 19:03:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-25 19:03:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-10-25 19:03:51,235 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2020-10-25 19:03:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:51,236 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-10-25 19:03:51,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:03:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-10-25 19:03:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 19:03:51,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:51,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:51,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:51,438 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash -828492548, now seen corresponding path program 1 times [2020-10-25 19:03:51,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:51,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264953810] [2020-10-25 19:03:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 19:03:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264953810] [2020-10-25 19:03:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017336876] [2020-10-25 19:03:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 19:03:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 19:03:51,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 19:03:51,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-25 19:03:51,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268283167] [2020-10-25 19:03:51,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 19:03:51,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:51,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 19:03:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:51,692 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 5 states. [2020-10-25 19:03:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:51,770 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-10-25 19:03:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:03:51,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-25 19:03:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:51,772 INFO L225 Difference]: With dead ends: 92 [2020-10-25 19:03:51,772 INFO L226 Difference]: Without dead ends: 50 [2020-10-25 19:03:51,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-25 19:03:51,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-25 19:03:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-25 19:03:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-10-25 19:03:51,781 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 31 [2020-10-25 19:03:51,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:51,781 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-10-25 19:03:51,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 19:03:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-10-25 19:03:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-25 19:03:51,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:51,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:51,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 19:03:51,990 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1808056250, now seen corresponding path program 2 times [2020-10-25 19:03:51,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:51,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867473949] [2020-10-25 19:03:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 19:03:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867473949] [2020-10-25 19:03:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292569539] [2020-10-25 19:03:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:52,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-25 19:03:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:52,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 19:03:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-25 19:03:52,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:52,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-10-25 19:03:52,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42348158] [2020-10-25 19:03:52,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 19:03:52,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:52,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 19:03:52,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-25 19:03:52,202 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 8 states. [2020-10-25 19:03:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:52,364 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-25 19:03:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 19:03:52,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-25 19:03:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:52,367 INFO L225 Difference]: With dead ends: 120 [2020-10-25 19:03:52,367 INFO L226 Difference]: Without dead ends: 114 [2020-10-25 19:03:52,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-25 19:03:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-25 19:03:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2020-10-25 19:03:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-25 19:03:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-10-25 19:03:52,384 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 33 [2020-10-25 19:03:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:52,385 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-10-25 19:03:52,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 19:03:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-10-25 19:03:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-25 19:03:52,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:52,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:52,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:52,605 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash -883385759, now seen corresponding path program 1 times [2020-10-25 19:03:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:52,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331396657] [2020-10-25 19:03:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-25 19:03:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331396657] [2020-10-25 19:03:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729769196] [2020-10-25 19:03:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 19:03:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-25 19:03:52,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 19:03:52,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-25 19:03:52,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187646493] [2020-10-25 19:03:52,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 19:03:52,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:52,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 19:03:52,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:03:52,772 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 7 states. [2020-10-25 19:03:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:52,898 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-10-25 19:03:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 19:03:52,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-25 19:03:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:52,902 INFO L225 Difference]: With dead ends: 164 [2020-10-25 19:03:52,902 INFO L226 Difference]: Without dead ends: 97 [2020-10-25 19:03:52,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:03:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-25 19:03:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-10-25 19:03:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-25 19:03:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-10-25 19:03:52,916 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 36 [2020-10-25 19:03:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:52,916 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-10-25 19:03:52,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 19:03:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-10-25 19:03:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-25 19:03:52,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:52,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:53,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:53,134 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:53,135 INFO L82 PathProgramCache]: Analyzing trace with hash 984846308, now seen corresponding path program 2 times [2020-10-25 19:03:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:53,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966509946] [2020-10-25 19:03:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:53,158 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:53,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148161163] [2020-10-25 19:03:53,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:53,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:03:53,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 19:03:53,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-25 19:03:53,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966509946] [2020-10-25 19:03:53,295 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:53,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148161163] [2020-10-25 19:03:53,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:53,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-25 19:03:53,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817067313] [2020-10-25 19:03:53,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 19:03:53,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 19:03:53,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 19:03:53,298 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 6 states. [2020-10-25 19:03:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:53,327 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-10-25 19:03:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 19:03:53,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-25 19:03:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:53,329 INFO L225 Difference]: With dead ends: 176 [2020-10-25 19:03:53,329 INFO L226 Difference]: Without dead ends: 94 [2020-10-25 19:03:53,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 19:03:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-25 19:03:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-25 19:03:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-25 19:03:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-10-25 19:03:53,342 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 47 [2020-10-25 19:03:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:53,342 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-10-25 19:03:53,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 19:03:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-10-25 19:03:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-25 19:03:53,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:53,345 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:53,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-25 19:03:53,559 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:53,560 INFO L82 PathProgramCache]: Analyzing trace with hash 999874210, now seen corresponding path program 3 times [2020-10-25 19:03:53,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:53,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354973374] [2020-10-25 19:03:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-25 19:03:53,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354973374] [2020-10-25 19:03:53,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:03:53,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:03:53,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350089957] [2020-10-25 19:03:53,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:03:53,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:53,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:03:53,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:53,663 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 4 states. [2020-10-25 19:03:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:53,733 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-10-25 19:03:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:03:53,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-25 19:03:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:53,734 INFO L225 Difference]: With dead ends: 179 [2020-10-25 19:03:53,734 INFO L226 Difference]: Without dead ends: 109 [2020-10-25 19:03:53,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-25 19:03:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2020-10-25 19:03:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-25 19:03:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-25 19:03:53,744 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 49 [2020-10-25 19:03:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:53,744 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-25 19:03:53,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:03:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-25 19:03:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-25 19:03:53,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:53,746 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:53,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-25 19:03:53,746 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1208175976, now seen corresponding path program 1 times [2020-10-25 19:03:53,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:53,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806163694] [2020-10-25 19:03:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:53,764 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:53,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316969899] [2020-10-25 19:03:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:53,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 19:03:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-25 19:03:53,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806163694] [2020-10-25 19:03:53,892 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:53,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316969899] [2020-10-25 19:03:53,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:53,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-25 19:03:53,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579537977] [2020-10-25 19:03:53,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 19:03:53,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:53,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 19:03:53,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:03:53,894 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 7 states. [2020-10-25 19:03:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:53,929 INFO L93 Difference]: Finished difference Result 159 states and 191 transitions. [2020-10-25 19:03:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 19:03:53,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-25 19:03:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:53,931 INFO L225 Difference]: With dead ends: 159 [2020-10-25 19:03:53,931 INFO L226 Difference]: Without dead ends: 86 [2020-10-25 19:03:53,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:03:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-25 19:03:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-25 19:03:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-25 19:03:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-10-25 19:03:53,947 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 55 [2020-10-25 19:03:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:53,947 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-10-25 19:03:53,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 19:03:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-10-25 19:03:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-25 19:03:53,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:53,949 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:54,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:54,163 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash -394370218, now seen corresponding path program 2 times [2020-10-25 19:03:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:54,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120238966] [2020-10-25 19:03:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:54,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:54,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644855297] [2020-10-25 19:03:54,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:54,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:03:54,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 19:03:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-25 19:03:54,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120238966] [2020-10-25 19:03:54,658 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:54,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644855297] [2020-10-25 19:03:54,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:54,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-25 19:03:54,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328726478] [2020-10-25 19:03:54,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 19:03:54,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:54,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 19:03:54,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:54,660 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 5 states. [2020-10-25 19:03:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:54,738 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2020-10-25 19:03:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 19:03:54,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-25 19:03:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:54,739 INFO L225 Difference]: With dead ends: 168 [2020-10-25 19:03:54,740 INFO L226 Difference]: Without dead ends: 101 [2020-10-25 19:03:54,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-25 19:03:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-25 19:03:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-25 19:03:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-10-25 19:03:54,747 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 57 [2020-10-25 19:03:54,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:54,747 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-10-25 19:03:54,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 19:03:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-10-25 19:03:54,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-25 19:03:54,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:54,749 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:54,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:54,957 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1115957675, now seen corresponding path program 3 times [2020-10-25 19:03:54,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:54,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775126825] [2020-10-25 19:03:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:54,975 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:54,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536610315] [2020-10-25 19:03:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:55,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-25 19:03:55,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:55,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 19:03:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-25 19:03:55,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775126825] [2020-10-25 19:03:55,126 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:55,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536610315] [2020-10-25 19:03:55,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:03:55,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:03:55,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773963989] [2020-10-25 19:03:55,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:03:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:03:55,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:55,135 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 4 states. [2020-10-25 19:03:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:55,259 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-10-25 19:03:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:03:55,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-25 19:03:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:55,262 INFO L225 Difference]: With dead ends: 134 [2020-10-25 19:03:55,262 INFO L226 Difference]: Without dead ends: 76 [2020-10-25 19:03:55,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-25 19:03:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2020-10-25 19:03:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-25 19:03:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-25 19:03:55,270 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 66 [2020-10-25 19:03:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:55,270 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-25 19:03:55,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:03:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-25 19:03:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-25 19:03:55,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:55,271 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:55,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-25 19:03:55,483 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:55,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1249971181, now seen corresponding path program 1 times [2020-10-25 19:03:55,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:55,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488209263] [2020-10-25 19:03:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:55,500 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:55,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101870098] [2020-10-25 19:03:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:55,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 19:03:55,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-25 19:03:55,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488209263] [2020-10-25 19:03:55,670 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:55,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101870098] [2020-10-25 19:03:55,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:55,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-25 19:03:55,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356272710] [2020-10-25 19:03:55,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 19:03:55,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 19:03:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:03:55,675 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 7 states. [2020-10-25 19:03:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:55,802 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2020-10-25 19:03:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 19:03:55,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-25 19:03:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:55,803 INFO L225 Difference]: With dead ends: 116 [2020-10-25 19:03:55,803 INFO L226 Difference]: Without dead ends: 76 [2020-10-25 19:03:55,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:03:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-25 19:03:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-25 19:03:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-25 19:03:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-25 19:03:55,809 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 66 [2020-10-25 19:03:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:55,809 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-25 19:03:55,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 19:03:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-25 19:03:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-25 19:03:55,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:55,810 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:56,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-25 19:03:56,020 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:56,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2135390482, now seen corresponding path program 2 times [2020-10-25 19:03:56,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:56,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656822199] [2020-10-25 19:03:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:56,037 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:56,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050760579] [2020-10-25 19:03:56,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:56,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:03:56,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:56,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 19:03:56,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-25 19:03:56,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656822199] [2020-10-25 19:03:56,186 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:56,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050760579] [2020-10-25 19:03:56,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:56,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-25 19:03:56,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609356744] [2020-10-25 19:03:56,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:03:56,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:03:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:56,188 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 4 states. [2020-10-25 19:03:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:56,211 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-10-25 19:03:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:03:56,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-25 19:03:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:56,213 INFO L225 Difference]: With dead ends: 102 [2020-10-25 19:03:56,213 INFO L226 Difference]: Without dead ends: 79 [2020-10-25 19:03:56,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-25 19:03:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-25 19:03:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-25 19:03:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-25 19:03:56,221 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 75 [2020-10-25 19:03:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:56,222 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-25 19:03:56,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:03:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-25 19:03:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-25 19:03:56,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:56,226 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:56,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-25 19:03:56,439 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash 949517612, now seen corresponding path program 3 times [2020-10-25 19:03:56,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:56,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64356469] [2020-10-25 19:03:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:56,465 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:56,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783656771] [2020-10-25 19:03:56,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:56,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-25 19:03:56,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 19:03:56,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-25 19:03:56,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64356469] [2020-10-25 19:03:56,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:56,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783656771] [2020-10-25 19:03:56,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:56,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-25 19:03:56,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067953348] [2020-10-25 19:03:56,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 19:03:56,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:56,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 19:03:56,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:56,921 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 5 states. [2020-10-25 19:03:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:56,943 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2020-10-25 19:03:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 19:03:56,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-25 19:03:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:56,945 INFO L225 Difference]: With dead ends: 104 [2020-10-25 19:03:56,945 INFO L226 Difference]: Without dead ends: 81 [2020-10-25 19:03:56,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-25 19:03:56,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-25 19:03:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-25 19:03:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-10-25 19:03:56,951 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 77 [2020-10-25 19:03:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:56,952 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-10-25 19:03:56,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 19:03:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-10-25 19:03:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-25 19:03:56,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:56,953 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:57,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:57,154 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:57,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2018761706, now seen corresponding path program 4 times [2020-10-25 19:03:57,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:57,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71059622] [2020-10-25 19:03:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:57,169 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:57,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868560909] [2020-10-25 19:03:57,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:57,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 19:03:57,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 19:03:57,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-25 19:03:57,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71059622] [2020-10-25 19:03:57,294 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:57,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868560909] [2020-10-25 19:03:57,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:57,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-25 19:03:57,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302054690] [2020-10-25 19:03:57,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 19:03:57,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 19:03:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 19:03:57,296 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 6 states. [2020-10-25 19:03:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:57,342 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2020-10-25 19:03:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 19:03:57,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-25 19:03:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:57,345 INFO L225 Difference]: With dead ends: 105 [2020-10-25 19:03:57,345 INFO L226 Difference]: Without dead ends: 82 [2020-10-25 19:03:57,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 19:03:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-25 19:03:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-25 19:03:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-25 19:03:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-25 19:03:57,352 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 79 [2020-10-25 19:03:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:57,353 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-25 19:03:57,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 19:03:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-25 19:03:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-25 19:03:57,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:57,354 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:57,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-25 19:03:57,565 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:57,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1229815000, now seen corresponding path program 5 times [2020-10-25 19:03:57,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:57,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049025416] [2020-10-25 19:03:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:57,581 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:57,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054068569] [2020-10-25 19:03:57,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:57,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-25 19:03:57,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-25 19:03:57,973 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:03:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:03:58,079 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:03:58,185 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:03:58,186 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:03:58,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-25 19:03:58,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:03:58 BoogieIcfgContainer [2020-10-25 19:03:58,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:03:58,501 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:03:58,501 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:03:58,502 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:03:58,502 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:03:48" (3/4) ... [2020-10-25 19:03:58,505 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:03:58,604 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:03:58,604 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:03:58,606 INFO L168 Benchmark]: Toolchain (without parser) took 10657.63 ms. Allocated memory was 52.4 MB in the beginning and 96.5 MB in the end (delta: 44.0 MB). Free memory was 29.2 MB in the beginning and 30.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 45.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:03:58,607 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 52.4 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:03:58,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.92 ms. Allocated memory is still 52.4 MB. Free memory was 28.6 MB in the beginning and 32.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:03:58,608 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.17 ms. Allocated memory is still 52.4 MB. Free memory was 32.1 MB in the beginning and 30.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:03:58,609 INFO L168 Benchmark]: Boogie Preprocessor took 39.90 ms. Allocated memory is still 52.4 MB. Free memory was 30.1 MB in the beginning and 28.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:03:58,609 INFO L168 Benchmark]: RCFGBuilder took 472.09 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 28.6 MB in the beginning and 35.7 MB in the end (delta: -7.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:03:58,610 INFO L168 Benchmark]: TraceAbstraction took 9611.57 ms. Allocated memory was 65.0 MB in the beginning and 96.5 MB in the end (delta: 31.5 MB). Free memory was 35.4 MB in the beginning and 38.2 MB in the end (delta: -2.8 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:03:58,611 INFO L168 Benchmark]: Witness Printer took 103.01 ms. Allocated memory is still 96.5 MB. Free memory was 38.2 MB in the beginning and 30.8 MB in the end (delta: 7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:03:58,614 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 52.4 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 339.92 ms. Allocated memory is still 52.4 MB. Free memory was 28.6 MB in the beginning and 32.1 MB in the end (delta: -3.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 78.17 ms. Allocated memory is still 52.4 MB. Free memory was 32.1 MB in the beginning and 30.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.90 ms. Allocated memory is still 52.4 MB. Free memory was 30.1 MB in the beginning and 28.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 472.09 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 28.6 MB in the beginning and 35.7 MB in the end (delta: -7.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9611.57 ms. Allocated memory was 65.0 MB in the beginning and 96.5 MB in the end (delta: 31.5 MB). Free memory was 35.4 MB in the beginning and 38.2 MB in the end (delta: -2.8 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. * Witness Printer took 103.01 ms. Allocated memory is still 96.5 MB. Free memory was 38.2 MB in the beginning and 30.8 MB in the end (delta: 7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "rangesum05.c", 18, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.4s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 544 SDtfs, 254 SDslu, 789 SDs, 0 SdLazy, 371 SolverSat, 117 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 736 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 100 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 1048 NumberOfCodeBlocks, 965 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 944 ConstructedInterpolants, 0 QuantifiedInterpolants, 60750 SizeOfPredicates, 18 NumberOfNonLiveVariables, 2591 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 765/844 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...