./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/ldv-regression/test24-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa528625528e1eb8428ab738bffd6c9e4b89662e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-20 00:43:55,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:43:55,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:43:55,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:43:55,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:43:55,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:43:55,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:43:55,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:43:55,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:43:55,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:43:55,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:43:55,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:43:55,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:43:55,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:43:55,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:43:55,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:43:55,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:43:55,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:43:55,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:43:55,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:43:55,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:43:55,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:43:55,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:43:55,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:43:55,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:43:55,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:43:55,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:43:55,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:43:55,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:43:55,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:43:55,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:43:55,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:43:55,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:43:55,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:43:55,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:43:55,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:43:55,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:43:55,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:43:55,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:43:55,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:43:55,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:43:55,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:43:55,368 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:43:55,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:43:55,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:43:55,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:43:55,370 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:43:55,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:43:55,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:43:55,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:43:55,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:43:55,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:43:55,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:43:55,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:43:55,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:43:55,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:43:55,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:43:55,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:43:55,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:43:55,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:43:55,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:43:55,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:43:55,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:43:55,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:43:55,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:43:55,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:43:55,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:43:55,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:43:55,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:43:55,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:43:55,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:43:55,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> fa528625528e1eb8428ab738bffd6c9e4b89662e [2020-10-20 00:43:55,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:43:55,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:43:55,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:43:55,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:43:55,605 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:43:55,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test24-2.c [2020-10-20 00:43:55,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fe677c8f/d5760a2ced4b4e3fbd7f36745e3cfcbe/FLAG1dc22daab [2020-10-20 00:43:56,196 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:43:56,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test24-2.c [2020-10-20 00:43:56,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fe677c8f/d5760a2ced4b4e3fbd7f36745e3cfcbe/FLAG1dc22daab [2020-10-20 00:43:56,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fe677c8f/d5760a2ced4b4e3fbd7f36745e3cfcbe [2020-10-20 00:43:56,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:43:56,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:43:56,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:56,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:43:56,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:43:56,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194f080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56, skipping insertion in model container [2020-10-20 00:43:56,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:43:56,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:43:56,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:56,831 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:43:56,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:56,870 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:43:56,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56 WrapperNode [2020-10-20 00:43:56,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:56,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:56,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:43:56,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:43:56,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:56,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:43:56,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:43:56,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:43:56,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:43:56,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:43:56,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:43:56,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:43:56,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (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 [2020-10-20 00:43:56,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:43:56,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:43:56,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:43:57,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:43:57,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:43:57,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:43:57,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:43:57,266 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:43:57,267 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 00:43:57,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:57 BoogieIcfgContainer [2020-10-20 00:43:57,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:43:57,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:43:57,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:43:57,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:43:57,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:43:56" (1/3) ... [2020-10-20 00:43:57,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d4415b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:57, skipping insertion in model container [2020-10-20 00:43:57,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56" (2/3) ... [2020-10-20 00:43:57,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d4415b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:57, skipping insertion in model container [2020-10-20 00:43:57,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:57" (3/3) ... [2020-10-20 00:43:57,300 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-10-20 00:43:57,315 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:43:57,330 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:43:57,347 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:43:57,376 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:43:57,376 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:43:57,377 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:43:57,377 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:43:57,377 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:43:57,377 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:43:57,377 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:43:57,378 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:43:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-20 00:43:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:43:57,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:57,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:57,398 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2020-10-20 00:43:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:57,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174633771] [2020-10-20 00:43:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:57,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174633771] [2020-10-20 00:43:57,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:43:57,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:43:57,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398140565] [2020-10-20 00:43:57,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:43:57,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:43:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:43:57,584 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-20 00:43:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:57,600 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-20 00:43:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:43:57,601 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:43:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:57,610 INFO L225 Difference]: With dead ends: 31 [2020-10-20 00:43:57,610 INFO L226 Difference]: Without dead ends: 13 [2020-10-20 00:43:57,613 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 [2020-10-20 00:43:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-20 00:43:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-20 00:43:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 00:43:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-20 00:43:57,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-20 00:43:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:57,641 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-20 00:43:57,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:43:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-20 00:43:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:43:57,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:57,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:57,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:43:57,643 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:57,644 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2020-10-20 00:43:57,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:57,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276503564] [2020-10-20 00:43:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:57,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276503564] [2020-10-20 00:43:57,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:43:57,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:43:57,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66027456] [2020-10-20 00:43:57,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:43:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:43:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:43:57,714 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-20 00:43:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:57,735 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-20 00:43:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:43:57,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 00:43:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:57,737 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:43:57,738 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 00:43:57,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:43:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 00:43:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-20 00:43:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:43:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-20 00:43:57,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-20 00:43:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:57,744 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-20 00:43:57,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:43:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-20 00:43:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:43:57,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:57,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:57,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:43:57,746 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:57,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2020-10-20 00:43:57,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:57,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400901075] [2020-10-20 00:43:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:57,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400901075] [2020-10-20 00:43:57,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073823535] [2020-10-20 00:43:57,824 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 [2020-10-20 00:43:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:57,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:43:57,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:43:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:57,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:43:57,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:43:57,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336524099] [2020-10-20 00:43:57,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:43:57,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:43:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:43:57,964 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-10-20 00:43:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:57,990 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-20 00:43:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:43:57,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-20 00:43:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:57,992 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:43:57,992 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 00:43:57,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:43:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 00:43:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-20 00:43:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:43:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-20 00:43:57,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-20 00:43:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:57,998 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-20 00:43:57,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:43:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-20 00:43:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:43:57,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:57,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:58,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:43:58,208 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:58,209 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2020-10-20 00:43:58,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:58,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511353620] [2020-10-20 00:43:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511353620] [2020-10-20 00:43:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565417255] [2020-10-20 00:43:58,344 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 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 [2020-10-20 00:43:58,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:43:58,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:43:58,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:43:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:43:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:58,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:43:58,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:43:58,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286952075] [2020-10-20 00:43:58,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:43:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:43:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:43:58,445 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-20 00:43:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:58,471 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-20 00:43:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:43:58,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-20 00:43:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:58,472 INFO L225 Difference]: With dead ends: 28 [2020-10-20 00:43:58,473 INFO L226 Difference]: Without dead ends: 19 [2020-10-20 00:43:58,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:43:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-20 00:43:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-20 00:43:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 00:43:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-20 00:43:58,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-20 00:43:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:58,478 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-20 00:43:58,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:43:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-20 00:43:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 00:43:58,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:58,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:58,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:43:58,694 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:58,694 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2020-10-20 00:43:58,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:58,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360444340] [2020-10-20 00:43:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:58,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360444340] [2020-10-20 00:43:58,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361694999] [2020-10-20 00:43:58,766 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 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 [2020-10-20 00:43:58,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 00:43:58,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:43:58,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:43:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:43:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:58,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:43:58,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 00:43:58,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349259822] [2020-10-20 00:43:58,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:43:58,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:43:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:43:58,877 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-10-20 00:43:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:58,909 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-20 00:43:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:43:58,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-20 00:43:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:58,911 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:43:58,911 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 00:43:58,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:43:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 00:43:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-20 00:43:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 00:43:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-20 00:43:58,916 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-20 00:43:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:58,916 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-20 00:43:58,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:43:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-20 00:43:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:43:58,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:58,925 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:59,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:43:59,128 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:59,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:59,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2020-10-20 00:43:59,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:59,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973783525] [2020-10-20 00:43:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:59,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973783525] [2020-10-20 00:43:59,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436933012] [2020-10-20 00:43:59,229 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 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 [2020-10-20 00:43:59,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:43:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:43:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:43:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:43:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:59,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:43:59,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 00:43:59,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650375082] [2020-10-20 00:43:59,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:43:59,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:43:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:43:59,321 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-20 00:43:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:59,375 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-20 00:43:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:43:59,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-20 00:43:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:59,376 INFO L225 Difference]: With dead ends: 32 [2020-10-20 00:43:59,377 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 00:43:59,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:43:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 00:43:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-20 00:43:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 00:43:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-20 00:43:59,382 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-20 00:43:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:59,383 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-20 00:43:59,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:43:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-20 00:43:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:43:59,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:59,384 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:59,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:43:59,597 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:59,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2020-10-20 00:43:59,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:59,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874634712] [2020-10-20 00:43:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:59,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874634712] [2020-10-20 00:43:59,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736868938] [2020-10-20 00:43:59,670 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 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 [2020-10-20 00:43:59,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-20 00:43:59,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:43:59,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:43:59,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:43:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:59,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:43:59,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 00:43:59,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640221015] [2020-10-20 00:43:59,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:43:59,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:43:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:43:59,780 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-20 00:43:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:59,812 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-20 00:43:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:43:59,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-20 00:43:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:59,814 INFO L225 Difference]: With dead ends: 34 [2020-10-20 00:43:59,814 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 00:43:59,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:43:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 00:43:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-20 00:43:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:43:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-20 00:43:59,819 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-20 00:43:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:59,820 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-20 00:43:59,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:43:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-20 00:43:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:43:59,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:59,821 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:00,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 00:44:00,033 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2020-10-20 00:44:00,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:00,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141825406] [2020-10-20 00:44:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:00,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141825406] [2020-10-20 00:44:00,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188526329] [2020-10-20 00:44:00,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-20 00:44:00,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-20 00:44:00,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:44:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:00,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:00,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 00:44:00,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635596407] [2020-10-20 00:44:00,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:44:00,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:00,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:44:00,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:44:00,351 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-20 00:44:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:00,408 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-20 00:44:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:44:00,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-20 00:44:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:00,413 INFO L225 Difference]: With dead ends: 36 [2020-10-20 00:44:00,414 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 00:44:00,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:44:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 00:44:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-20 00:44:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:44:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-20 00:44:00,424 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-20 00:44:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:00,425 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-20 00:44:00,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:44:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-20 00:44:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:44:00,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:00,427 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:00,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:00,641 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2020-10-20 00:44:00,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:00,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277481689] [2020-10-20 00:44:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:00,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277481689] [2020-10-20 00:44:00,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999058211] [2020-10-20 00:44:00,737 INFO L93 rtionOrderModulation]: Changing assertion order to 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 [2020-10-20 00:44:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:00,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:44:00,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:00,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:00,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 00:44:00,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351140628] [2020-10-20 00:44:00,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:44:00,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:00,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:44:00,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:44:00,832 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-10-20 00:44:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:00,879 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-20 00:44:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 00:44:00,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-20 00:44:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:00,880 INFO L225 Difference]: With dead ends: 38 [2020-10-20 00:44:00,880 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:44:00,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:44:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:44:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-20 00:44:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:44:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-20 00:44:00,886 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-20 00:44:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:00,886 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-20 00:44:00,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:44:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-20 00:44:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 00:44:00,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:00,888 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:01,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:01,099 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:01,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2020-10-20 00:44:01,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:01,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229732278] [2020-10-20 00:44:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:01,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229732278] [2020-10-20 00:44:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103949121] [2020-10-20 00:44:01,203 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 [2020-10-20 00:44:01,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:44:01,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:01,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 00:44:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:01,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:01,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 00:44:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901896722] [2020-10-20 00:44:01,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:44:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:44:01,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:44:01,319 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-10-20 00:44:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:01,374 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-20 00:44:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:44:01,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-20 00:44:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:01,378 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:44:01,378 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 00:44:01,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:44:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 00:44:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-20 00:44:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:44:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-20 00:44:01,390 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-20 00:44:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:01,391 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-20 00:44:01,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:44:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-20 00:44:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 00:44:01,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:01,393 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:01,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 00:44:01,594 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:01,594 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2020-10-20 00:44:01,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:01,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396498402] [2020-10-20 00:44:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:01,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396498402] [2020-10-20 00:44:01,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312620013] [2020-10-20 00:44:01,704 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 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 [2020-10-20 00:44:01,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-20 00:44:01,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 00:44:01,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:01,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:01,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 00:44:01,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955793143] [2020-10-20 00:44:01,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 00:44:01,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:01,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 00:44:01,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:44:01,973 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-10-20 00:44:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:02,037 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-20 00:44:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:44:02,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-20 00:44:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:02,042 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:44:02,042 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 00:44:02,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:44:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 00:44:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-20 00:44:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:44:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-20 00:44:02,052 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-20 00:44:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:02,053 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-20 00:44:02,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 00:44:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-20 00:44:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 00:44:02,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:02,054 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:02,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:02,267 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:02,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2020-10-20 00:44:02,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:02,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909203716] [2020-10-20 00:44:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:02,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909203716] [2020-10-20 00:44:02,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731927397] [2020-10-20 00:44:02,399 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 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 [2020-10-20 00:44:02,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:44:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 00:44:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:02,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:02,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 00:44:02,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274866309] [2020-10-20 00:44:02,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 00:44:02,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 00:44:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-20 00:44:02,501 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2020-10-20 00:44:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:02,552 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-20 00:44:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 00:44:02,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-20 00:44:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:02,553 INFO L225 Difference]: With dead ends: 44 [2020-10-20 00:44:02,553 INFO L226 Difference]: Without dead ends: 35 [2020-10-20 00:44:02,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-20 00:44:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-20 00:44:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-20 00:44:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 00:44:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-20 00:44:02,562 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-20 00:44:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:02,562 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-20 00:44:02,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 00:44:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-20 00:44:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 00:44:02,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:02,564 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:02,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:02,765 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:02,766 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2020-10-20 00:44:02,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:02,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468317709] [2020-10-20 00:44:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:02,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468317709] [2020-10-20 00:44:02,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142434285] [2020-10-20 00:44:02,893 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 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 [2020-10-20 00:44:03,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-20 00:44:03,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 00:44:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:03,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:03,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 00:44:03,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088217410] [2020-10-20 00:44:03,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 00:44:03,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:03,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 00:44:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-20 00:44:03,201 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2020-10-20 00:44:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:03,264 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-20 00:44:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 00:44:03,265 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-20 00:44:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:03,266 INFO L225 Difference]: With dead ends: 46 [2020-10-20 00:44:03,266 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 00:44:03,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-20 00:44:03,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 00:44:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-20 00:44:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 00:44:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-20 00:44:03,274 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-10-20 00:44:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:03,275 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-20 00:44:03,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 00:44:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-20 00:44:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 00:44:03,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:03,277 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:03,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 00:44:03,487 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:03,487 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2020-10-20 00:44:03,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:03,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469516101] [2020-10-20 00:44:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:03,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469516101] [2020-10-20 00:44:03,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055535850] [2020-10-20 00:44:03,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-20 00:44:04,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-20 00:44:04,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 00:44:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:04,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:04,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-20 00:44:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916268800] [2020-10-20 00:44:04,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:44:04,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:44:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:44:04,898 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2020-10-20 00:44:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:04,969 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-20 00:44:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 00:44:04,970 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-20 00:44:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:04,971 INFO L225 Difference]: With dead ends: 48 [2020-10-20 00:44:04,971 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 00:44:04,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:44:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 00:44:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-20 00:44:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 00:44:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-20 00:44:04,979 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-20 00:44:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:04,980 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-20 00:44:04,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:44:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-20 00:44:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 00:44:04,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:04,982 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:05,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-20 00:44:05,183 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2020-10-20 00:44:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:05,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17260976] [2020-10-20 00:44:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:05,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17260976] [2020-10-20 00:44:05,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17743730] [2020-10-20 00:44:05,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-20 00:44:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 00:44:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:05,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:05,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-20 00:44:05,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997761441] [2020-10-20 00:44:05,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 00:44:05,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:05,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 00:44:05,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-20 00:44:05,418 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2020-10-20 00:44:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:05,483 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-20 00:44:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 00:44:05,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-20 00:44:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:05,487 INFO L225 Difference]: With dead ends: 50 [2020-10-20 00:44:05,487 INFO L226 Difference]: Without dead ends: 41 [2020-10-20 00:44:05,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-20 00:44:05,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-20 00:44:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-20 00:44:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-20 00:44:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-20 00:44:05,497 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-20 00:44:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:05,498 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-20 00:44:05,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 00:44:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-20 00:44:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-20 00:44:05,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:05,499 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:05,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 00:44:05,704 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:05,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:05,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2020-10-20 00:44:05,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:05,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968798654] [2020-10-20 00:44:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:05,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968798654] [2020-10-20 00:44:05,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449618122] [2020-10-20 00:44:05,869 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 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 [2020-10-20 00:44:05,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:44:05,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:05,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:44:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:05,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:05,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-20 00:44:05,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259445525] [2020-10-20 00:44:05,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 00:44:05,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 00:44:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-20 00:44:05,974 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-10-20 00:44:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:06,035 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-20 00:44:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 00:44:06,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-20 00:44:06,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:06,036 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:44:06,037 INFO L226 Difference]: Without dead ends: 43 [2020-10-20 00:44:06,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-20 00:44:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-20 00:44:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-20 00:44:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 00:44:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-20 00:44:06,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-20 00:44:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:06,043 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-20 00:44:06,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 00:44:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-20 00:44:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-20 00:44:06,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:06,044 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:06,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:06,257 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2020-10-20 00:44:06,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:06,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803428327] [2020-10-20 00:44:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:06,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803428327] [2020-10-20 00:44:06,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62045124] [2020-10-20 00:44:06,442 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 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 [2020-10-20 00:44:08,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-20 00:44:08,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:08,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 00:44:08,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:08,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:08,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-20 00:44:08,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458043252] [2020-10-20 00:44:08,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-20 00:44:08,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:08,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 00:44:08,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-20 00:44:08,533 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2020-10-20 00:44:08,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:08,606 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-20 00:44:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-20 00:44:08,607 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-20 00:44:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:08,607 INFO L225 Difference]: With dead ends: 54 [2020-10-20 00:44:08,607 INFO L226 Difference]: Without dead ends: 45 [2020-10-20 00:44:08,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-20 00:44:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-20 00:44:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-20 00:44:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-20 00:44:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-20 00:44:08,613 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-10-20 00:44:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:08,614 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-20 00:44:08,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-20 00:44:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-20 00:44:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-20 00:44:08,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:08,615 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:08,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-20 00:44:08,826 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:08,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:08,826 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2020-10-20 00:44:08,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:08,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967391783] [2020-10-20 00:44:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:09,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967391783] [2020-10-20 00:44:09,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135620089] [2020-10-20 00:44:09,050 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 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 [2020-10-20 00:44:09,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:44:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 00:44:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:09,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:09,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 00:44:09,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114408139] [2020-10-20 00:44:09,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 00:44:09,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:09,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 00:44:09,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:44:09,152 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2020-10-20 00:44:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:09,224 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-20 00:44:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 00:44:09,225 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-20 00:44:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:09,226 INFO L225 Difference]: With dead ends: 56 [2020-10-20 00:44:09,226 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 00:44:09,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:44:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 00:44:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-20 00:44:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-20 00:44:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-20 00:44:09,231 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-10-20 00:44:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:09,232 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-20 00:44:09,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 00:44:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-20 00:44:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-20 00:44:09,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:09,233 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:09,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-20 00:44:09,446 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2020-10-20 00:44:09,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:09,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518546411] [2020-10-20 00:44:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:09,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518546411] [2020-10-20 00:44:09,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630921061] [2020-10-20 00:44:09,687 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:11,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-20 00:44:11,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 00:44:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:11,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:11,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-20 00:44:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648969372] [2020-10-20 00:44:11,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 00:44:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 00:44:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-20 00:44:11,900 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2020-10-20 00:44:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:11,973 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-20 00:44:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 00:44:11,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-20 00:44:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:11,974 INFO L225 Difference]: With dead ends: 58 [2020-10-20 00:44:11,974 INFO L226 Difference]: Without dead ends: 49 [2020-10-20 00:44:11,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-20 00:44:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-20 00:44:11,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-20 00:44:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-20 00:44:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-20 00:44:11,980 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-10-20 00:44:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:11,980 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-20 00:44:11,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 00:44:11,981 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-20 00:44:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-20 00:44:11,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:11,982 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:12,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:12,183 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:12,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2020-10-20 00:44:12,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:12,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757531812] [2020-10-20 00:44:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:12,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757531812] [2020-10-20 00:44:12,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17154823] [2020-10-20 00:44:12,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:18,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-20 00:44:18,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:18,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 00:44:18,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:18,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:18,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-20 00:44:18,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144092820] [2020-10-20 00:44:18,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 00:44:18,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 00:44:18,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-20 00:44:18,467 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2020-10-20 00:44:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:18,536 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-20 00:44:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 00:44:18,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-20 00:44:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:18,537 INFO L225 Difference]: With dead ends: 60 [2020-10-20 00:44:18,537 INFO L226 Difference]: Without dead ends: 51 [2020-10-20 00:44:18,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-20 00:44:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-20 00:44:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-20 00:44:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-20 00:44:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-20 00:44:18,544 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-20 00:44:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:18,544 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-20 00:44:18,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 00:44:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-20 00:44:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-20 00:44:18,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:18,546 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:18,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:18,756 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2020-10-20 00:44:18,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:18,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559631298] [2020-10-20 00:44:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:19,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559631298] [2020-10-20 00:44:19,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930544945] [2020-10-20 00:44:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:19,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 00:44:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:19,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:19,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-20 00:44:19,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457674660] [2020-10-20 00:44:19,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-20 00:44:19,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:19,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 00:44:19,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-20 00:44:19,134 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2020-10-20 00:44:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:19,207 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-20 00:44:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 00:44:19,208 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-10-20 00:44:19,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:19,209 INFO L225 Difference]: With dead ends: 61 [2020-10-20 00:44:19,209 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 00:44:19,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-20 00:44:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 00:44:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-20 00:44:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-20 00:44:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-20 00:44:19,218 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-20 00:44:19,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:19,219 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-20 00:44:19,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-20 00:44:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-20 00:44:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-20 00:44:19,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:19,220 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:19,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:19,424 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2020-10-20 00:44:19,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:19,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709559365] [2020-10-20 00:44:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:44:19,543 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:44:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:44:19,658 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:44:19,695 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:44:19,696 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:44:19,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-20 00:44:19,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:44:19 BoogieIcfgContainer [2020-10-20 00:44:19,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:44:19,783 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:44:19,783 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:44:19,783 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:44:19,784 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:57" (3/4) ... [2020-10-20 00:44:19,787 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:44:19,895 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:44:19,895 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:44:19,897 INFO L168 Benchmark]: Toolchain (without parser) took 23311.40 ms. Allocated memory was 43.0 MB in the beginning and 73.4 MB in the end (delta: 30.4 MB). Free memory was 21.1 MB in the beginning and 20.9 MB in the end (delta: 186.4 kB). Peak memory consumption was 30.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:19,898 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.7 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:44:19,899 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.76 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 20.2 MB in the beginning and 21.5 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:19,899 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.14 ms. Allocated memory is still 43.5 MB. Free memory was 21.5 MB in the beginning and 19.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:19,899 INFO L168 Benchmark]: Boogie Preprocessor took 25.82 ms. Allocated memory is still 43.5 MB. Free memory was 19.7 MB in the beginning and 18.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:19,900 INFO L168 Benchmark]: RCFGBuilder took 335.53 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 18.1 MB in the beginning and 20.1 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:19,901 INFO L168 Benchmark]: TraceAbstraction took 22496.19 ms. Allocated memory was 45.1 MB in the beginning and 73.4 MB in the end (delta: 28.3 MB). Free memory was 19.7 MB in the beginning and 26.7 MB in the end (delta: -7.0 MB). Peak memory consumption was 21.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:19,901 INFO L168 Benchmark]: Witness Printer took 112.19 ms. Allocated memory is still 73.4 MB. Free memory was 26.7 MB in the beginning and 20.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:19,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.7 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 278.76 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 20.2 MB in the beginning and 21.5 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 38.14 ms. Allocated memory is still 43.5 MB. Free memory was 21.5 MB in the beginning and 19.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 25.82 ms. Allocated memory is still 43.5 MB. Free memory was 19.7 MB in the beginning and 18.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 335.53 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 18.1 MB in the beginning and 20.1 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 22496.19 ms. Allocated memory was 45.1 MB in the beginning and 73.4 MB in the end (delta: 28.3 MB). Free memory was 19.7 MB in the beginning and 26.7 MB in the end (delta: -7.0 MB). Peak memory consumption was 21.4 MB. Max. memory is 14.3 GB. * Witness Printer took 112.19 ms. Allocated memory is still 73.4 MB. Free memory was 26.7 MB in the beginning and 20.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] COND TRUE !check(ad1, i) [L3] __assert_fail("0", "test24-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.3s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1590 SDs, 0 SdLazy, 630 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, 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, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 12.5s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3097 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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...