./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.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 894596aca9a1908fd868912b199c54fd3b1d0950 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 14:38:17,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 14:38:17,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 14:38:17,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 14:38:17,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 14:38:17,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 14:38:17,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 14:38:17,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 14:38:17,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 14:38:17,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 14:38:17,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 14:38:17,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 14:38:17,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 14:38:17,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 14:38:17,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 14:38:17,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 14:38:17,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 14:38:17,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 14:38:17,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 14:38:17,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 14:38:17,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 14:38:17,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 14:38:17,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 14:38:17,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 14:38:17,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 14:38:17,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 14:38:17,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 14:38:17,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 14:38:17,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 14:38:17,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 14:38:17,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 14:38:17,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 14:38:17,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 14:38:17,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 14:38:17,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 14:38:17,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 14:38:17,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 14:38:17,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 14:38:17,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 14:38:17,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 14:38:17,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 14:38:17,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 14:38:17,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 14:38:17,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 14:38:17,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 14:38:17,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 14:38:17,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 14:38:17,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 14:38:17,368 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 14:38:17,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 14:38:17,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 14:38:17,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 14:38:17,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 14:38:17,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 14:38:17,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 14:38:17,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 14:38:17,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 14:38:17,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 14:38:17,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 14:38:17,371 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 14:38:17,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 14:38:17,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 14:38:17,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 14:38:17,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 14:38:17,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:38:17,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 14:38:17,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 14:38:17,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 14:38:17,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 14:38:17,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 14:38:17,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 14:38:17,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 14:38:17,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 894596aca9a1908fd868912b199c54fd3b1d0950 [2021-08-29 14:38:17,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 14:38:17,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 14:38:17,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 14:38:17,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 14:38:17,625 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 14:38:17,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-08-29 14:38:17,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb789e5a5/cebed2dec9ae4bbdb71f14f4d0eb2036/FLAG195bb7158 [2021-08-29 14:38:17,999 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 14:38:18,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-08-29 14:38:18,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb789e5a5/cebed2dec9ae4bbdb71f14f4d0eb2036/FLAG195bb7158 [2021-08-29 14:38:18,432 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb789e5a5/cebed2dec9ae4bbdb71f14f4d0eb2036 [2021-08-29 14:38:18,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 14:38:18,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 14:38:18,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 14:38:18,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 14:38:18,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 14:38:18,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265bf32b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18, skipping insertion in model container [2021-08-29 14:38:18,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 14:38:18,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 14:38:18,532 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-08-29 14:38:18,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:38:18,545 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 14:38:18,552 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-08-29 14:38:18,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:38:18,567 INFO L208 MainTranslator]: Completed translation [2021-08-29 14:38:18,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18 WrapperNode [2021-08-29 14:38:18,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 14:38:18,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 14:38:18,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 14:38:18,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 14:38:18,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 14:38:18,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 14:38:18,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 14:38:18,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 14:38:18,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 14:38:18,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 14:38:18,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 14:38:18,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 14:38:18,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (1/1) ... [2021-08-29 14:38:18,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:38:18,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:18,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 14:38:18,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 14:38:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 14:38:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 14:38:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 14:38:18,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 14:38:18,752 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 14:38:18,755 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 14:38:18,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:38:18 BoogieIcfgContainer [2021-08-29 14:38:18,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 14:38:18,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 14:38:18,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 14:38:18,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 14:38:18,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:38:18" (1/3) ... [2021-08-29 14:38:18,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e031bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:38:18, skipping insertion in model container [2021-08-29 14:38:18,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:38:18" (2/3) ... [2021-08-29 14:38:18,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e031bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:38:18, skipping insertion in model container [2021-08-29 14:38:18,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:38:18" (3/3) ... [2021-08-29 14:38:18,763 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2021-08-29 14:38:18,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 14:38:18,766 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-29 14:38:18,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 14:38:18,808 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 14:38:18,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-29 14:38:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 14:38:18,824 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:38:18,824 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 14:38:18,825 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:38:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:38:18,836 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-08-29 14:38:18,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:38:18,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611978554] [2021-08-29 14:38:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:18,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:38:18,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:38:18,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831097565] [2021-08-29 14:38:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:18,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:18,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:38:18,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 14:38:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:38:19,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 14:38:19,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:38:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:19,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:38:19,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:38:19,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611978554] [2021-08-29 14:38:19,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:38:19,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831097565] [2021-08-29 14:38:19,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831097565] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:38:19,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:38:19,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 14:38:19,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395378813] [2021-08-29 14:38:19,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:38:19,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:38:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:38:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:38:19,130 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:38:19,214 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-08-29 14:38:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:38:19,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-29 14:38:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:38:19,229 INFO L225 Difference]: With dead ends: 54 [2021-08-29 14:38:19,230 INFO L226 Difference]: Without dead ends: 23 [2021-08-29 14:38:19,232 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.80ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:38:19,235 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.01ms IncrementalHoareTripleChecker+Time [2021-08-29 14:38:19,237 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 61.01ms Time] [2021-08-29 14:38:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-29 14:38:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-08-29 14:38:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-29 14:38:19,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2021-08-29 14:38:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:38:19,262 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-29 14:38:19,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-29 14:38:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 14:38:19,263 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:38:19,263 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-29 14:38:19,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 14:38:19,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-08-29 14:38:19,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:38:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:38:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-08-29 14:38:19,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:38:19,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725612062] [2021-08-29 14:38:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:19,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:38:19,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:38:19,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405124104] [2021-08-29 14:38:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:19,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:19,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:38:19,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 14:38:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:38:19,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:38:19,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:38:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:19,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:38:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 14:38:19,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:38:19,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725612062] [2021-08-29 14:38:19,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:38:19,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405124104] [2021-08-29 14:38:19,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405124104] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:38:19,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:38:19,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-29 14:38:19,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896923548] [2021-08-29 14:38:19,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:38:19,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:38:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:38:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 14:38:19,852 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:38:19,970 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-08-29 14:38:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 14:38:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 14:38:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:38:19,971 INFO L225 Difference]: With dead ends: 30 [2021-08-29 14:38:19,971 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 14:38:19,971 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 250.80ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:38:19,972 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.00ms IncrementalHoareTripleChecker+Time [2021-08-29 14:38:19,973 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 54.00ms Time] [2021-08-29 14:38:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 14:38:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2021-08-29 14:38:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-29 14:38:19,975 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-08-29 14:38:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:38:19,975 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-29 14:38:19,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-29 14:38:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 14:38:19,976 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:38:19,976 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:38:19,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 14:38:20,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-29 14:38:20,177 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:38:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:38:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2021-08-29 14:38:20,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:38:20,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772490430] [2021-08-29 14:38:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:20,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:38:20,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:38:20,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668176865] [2021-08-29 14:38:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:20,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:20,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:20,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:38:20,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 14:38:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:38:20,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 14:38:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:38:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:20,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:38:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:20,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:38:20,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772490430] [2021-08-29 14:38:20,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:38:20,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668176865] [2021-08-29 14:38:20,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668176865] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:38:20,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:38:20,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-29 14:38:20,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348535651] [2021-08-29 14:38:20,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 14:38:20,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:38:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 14:38:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-29 14:38:20,330 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:38:20,392 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-08-29 14:38:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 14:38:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 14:38:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:38:20,394 INFO L225 Difference]: With dead ends: 36 [2021-08-29 14:38:20,394 INFO L226 Difference]: Without dead ends: 32 [2021-08-29 14:38:20,396 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.61ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:38:20,398 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.89ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.72ms IncrementalHoareTripleChecker+Time [2021-08-29 14:38:20,399 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.89ms Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 40.72ms Time] [2021-08-29 14:38:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-29 14:38:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-08-29 14:38:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-29 14:38:20,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-08-29 14:38:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:38:20,409 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-29 14:38:20,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-29 14:38:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 14:38:20,414 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:38:20,414 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:38:20,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 14:38:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:20,615 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:38:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:38:20,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2021-08-29 14:38:20,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:38:20,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283080802] [2021-08-29 14:38:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:20,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:38:20,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:38:20,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189047222] [2021-08-29 14:38:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:20,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:20,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:38:20,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 14:38:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:38:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 14:38:20,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:38:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:20,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:38:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:20,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:38:20,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283080802] [2021-08-29 14:38:20,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:38:20,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189047222] [2021-08-29 14:38:20,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189047222] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:38:20,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:38:20,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-29 14:38:20,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193814167] [2021-08-29 14:38:20,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 14:38:20,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:38:20,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 14:38:20,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:38:20,976 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:38:21,067 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-08-29 14:38:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 14:38:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 14:38:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:38:21,068 INFO L225 Difference]: With dead ends: 28 [2021-08-29 14:38:21,068 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 14:38:21,069 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.29ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:38:21,070 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 71.34ms IncrementalHoareTripleChecker+Time [2021-08-29 14:38:21,070 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 12 Unchecked, 71.34ms Time] [2021-08-29 14:38:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 14:38:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-29 14:38:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-29 14:38:21,074 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2021-08-29 14:38:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:38:21,074 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-29 14:38:21,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-29 14:38:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 14:38:21,075 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:38:21,075 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-08-29 14:38:21,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 14:38:21,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:21,281 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:38:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:38:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 2 times [2021-08-29 14:38:21,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:38:21,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421199238] [2021-08-29 14:38:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:21,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:38:21,289 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:38:21,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925569025] [2021-08-29 14:38:21,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 14:38:21,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:21,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:21,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:38:21,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 14:38:21,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 14:38:21,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 14:38:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-29 14:38:21,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:38:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:21,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:38:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:21,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:38:21,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421199238] [2021-08-29 14:38:21,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:38:21,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925569025] [2021-08-29 14:38:21,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925569025] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:38:21,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:38:21,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-29 14:38:21,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184963395] [2021-08-29 14:38:21,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 14:38:21,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:38:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 14:38:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:38:21,697 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:21,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:38:21,831 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-08-29 14:38:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 14:38:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-29 14:38:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:38:21,832 INFO L225 Difference]: With dead ends: 40 [2021-08-29 14:38:21,832 INFO L226 Difference]: Without dead ends: 34 [2021-08-29 14:38:21,833 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 206.88ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-29 14:38:21,833 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.54ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 41.83ms IncrementalHoareTripleChecker+Time [2021-08-29 14:38:21,833 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.54ms Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 31 Unchecked, 41.83ms Time] [2021-08-29 14:38:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-29 14:38:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-08-29 14:38:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-08-29 14:38:21,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-08-29 14:38:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:38:21,838 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-08-29 14:38:21,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-08-29 14:38:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 14:38:21,838 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:38:21,839 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-29 14:38:21,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 14:38:22,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:22,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:38:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:38:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 2 times [2021-08-29 14:38:22,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:38:22,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300803101] [2021-08-29 14:38:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:22,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:38:22,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:38:22,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358229095] [2021-08-29 14:38:22,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 14:38:22,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:22,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:38:22,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 14:38:22,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 14:38:22,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 14:38:22,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:38:22,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:38:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:22,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:38:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:22,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:38:22,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300803101] [2021-08-29 14:38:22,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:38:22,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358229095] [2021-08-29 14:38:22,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358229095] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:38:22,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:38:22,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-29 14:38:22,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361540596] [2021-08-29 14:38:22,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 14:38:22,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:38:22,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 14:38:22,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-29 14:38:22,224 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:38:22,346 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-08-29 14:38:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-29 14:38:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-29 14:38:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:38:22,348 INFO L225 Difference]: With dead ends: 68 [2021-08-29 14:38:22,348 INFO L226 Difference]: Without dead ends: 64 [2021-08-29 14:38:22,348 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 94.32ms TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-08-29 14:38:22,350 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.42ms IncrementalHoareTripleChecker+Time [2021-08-29 14:38:22,350 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 54.42ms Time] [2021-08-29 14:38:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-29 14:38:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-08-29 14:38:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-08-29 14:38:22,366 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 23 [2021-08-29 14:38:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:38:22,366 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-08-29 14:38:22,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-08-29 14:38:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-29 14:38:22,368 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:38:22,368 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-08-29 14:38:22,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 14:38:22,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:22,581 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:38:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:38:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 881214008, now seen corresponding path program 3 times [2021-08-29 14:38:22,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:38:22,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621079316] [2021-08-29 14:38:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:22,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:38:22,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:38:22,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002370820] [2021-08-29 14:38:22,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 14:38:22,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:22,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:22,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:38:22,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 14:38:22,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-29 14:38:22,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 14:38:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 14:38:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:38:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:22,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:38:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:38:23,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:38:23,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621079316] [2021-08-29 14:38:23,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:38:23,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002370820] [2021-08-29 14:38:23,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002370820] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:38:23,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:38:23,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-29 14:38:23,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796276615] [2021-08-29 14:38:23,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-29 14:38:23,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:38:23,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-29 14:38:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-29 14:38:23,449 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:38:24,031 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-08-29 14:38:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 14:38:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-29 14:38:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:38:24,032 INFO L225 Difference]: With dead ends: 54 [2021-08-29 14:38:24,032 INFO L226 Difference]: Without dead ends: 48 [2021-08-29 14:38:24,032 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 593.61ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-08-29 14:38:24,033 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 266.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 283.79ms IncrementalHoareTripleChecker+Time [2021-08-29 14:38:24,033 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 240 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 45 Unchecked, 283.79ms Time] [2021-08-29 14:38:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-29 14:38:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-29 14:38:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-08-29 14:38:24,039 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 29 [2021-08-29 14:38:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:38:24,039 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-08-29 14:38:24,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:38:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-08-29 14:38:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-29 14:38:24,040 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:38:24,040 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-08-29 14:38:24,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 14:38:24,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:24,241 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:38:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:38:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1148586307, now seen corresponding path program 3 times [2021-08-29 14:38:24,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:38:24,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809854771] [2021-08-29 14:38:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:38:24,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:38:24,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:38:24,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876840105] [2021-08-29 14:38:24,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 14:38:24,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:38:24,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:38:24,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:38:24,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 14:38:24,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-29 14:38:24,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-29 14:38:24,851 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 14:38:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 14:38:24,896 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 14:38:24,896 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 14:38:24,897 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-08-29 14:38:24,898 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-08-29 14:38:24,898 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-08-29 14:38:24,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 14:38:25,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-29 14:38:25,103 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 14:38:25,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:38:25 BoogieIcfgContainer [2021-08-29 14:38:25,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 14:38:25,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 14:38:25,137 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 14:38:25,138 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 14:38:25,138 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:38:18" (3/4) ... [2021-08-29 14:38:25,139 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 14:38:25,197 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 14:38:25,198 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 14:38:25,198 INFO L158 Benchmark]: Toolchain (without parser) took 6762.94ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 28.9MB in the beginning and 27.7MB in the end (delta: 1.2MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. [2021-08-29 14:38:25,198 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory is still 33.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:38:25,199 INFO L158 Benchmark]: CACSL2BoogieTranslator took 134.00ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 28.6MB in the beginning and 46.7MB in the end (delta: -18.1MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2021-08-29 14:38:25,199 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.26ms. Allocated memory is still 62.9MB. Free memory was 46.7MB in the beginning and 45.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 14:38:25,199 INFO L158 Benchmark]: Boogie Preprocessor took 18.67ms. Allocated memory is still 62.9MB. Free memory was 45.3MB in the beginning and 44.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:38:25,200 INFO L158 Benchmark]: RCFGBuilder took 141.74ms. Allocated memory is still 62.9MB. Free memory was 44.2MB in the beginning and 35.6MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 14:38:25,200 INFO L158 Benchmark]: TraceAbstraction took 6379.19ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 35.0MB in the beginning and 32.6MB in the end (delta: 2.5MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2021-08-29 14:38:25,200 INFO L158 Benchmark]: Witness Printer took 60.43ms. Allocated memory is still 75.5MB. Free memory was 32.6MB in the beginning and 27.7MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 14:38:25,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory is still 33.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 134.00ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 28.6MB in the beginning and 46.7MB in the end (delta: -18.1MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.26ms. Allocated memory is still 62.9MB. Free memory was 46.7MB in the beginning and 45.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.67ms. Allocated memory is still 62.9MB. Free memory was 45.3MB in the beginning and 44.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 141.74ms. Allocated memory is still 62.9MB. Free memory was 44.2MB in the beginning and 35.6MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 6379.19ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 35.0MB in the beginning and 32.6MB in the end (delta: 2.5MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. * Witness Printer took 60.43ms. Allocated memory is still 75.5MB. Free memory was 32.6MB in the beginning and 27.7MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND FALSE !(counter++<10) [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 6300.86ms, OverallIterations: 8, TraceHistogramMax: 11, EmptinessCheckTime: 15.50ms, AutomataDifference: 1263.53ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.58ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 116 SdHoareTripleChecker+Valid, 607.11ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 116 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 508.93ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 88 IncrementalHoareTripleChecker+Unchecked, 314 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 604 IncrementalHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 0 mSDtfsCounter, 604 mSolverCounterSat, 5.78ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1261.30ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 47.28ms AutomataMinimizationTime, 7 MinimizatonAttempts, 39 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.10ms SsaConstructionTime, 780.27ms SatisfiabilityAnalysisTime, 2065.00ms InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 199 ConstructedInterpolants, 32 QuantifiedInterpolants, 1764 SizeOfPredicates, 26 NumberOfNonLiveVariables, 641 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 2/226 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 14:38:25,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...