./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.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/prodbin-ll_valuebound5.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 bc4d2acb145e333c6a4b88114f00bb3ad7905a78 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 14:35:52,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 14:35:52,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 14:35:52,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 14:35:52,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 14:35:52,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 14:35:52,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 14:35:52,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 14:35:52,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 14:35:52,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 14:35:52,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 14:35:52,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 14:35:52,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 14:35:52,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 14:35:52,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 14:35:52,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 14:35:52,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 14:35:52,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 14:35:52,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 14:35:52,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 14:35:52,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 14:35:52,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 14:35:52,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 14:35:52,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 14:35:52,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 14:35:52,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 14:35:52,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 14:35:52,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 14:35:52,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 14:35:52,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 14:35:52,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 14:35:52,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 14:35:52,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 14:35:52,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 14:35:52,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 14:35:52,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 14:35:52,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 14:35:52,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 14:35:52,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 14:35:52,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 14:35:52,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 14:35:52,449 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 14:35:52,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 14:35:52,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 14:35:52,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 14:35:52,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 14:35:52,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 14:35:52,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 14:35:52,485 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 14:35:52,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 14:35:52,485 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 14:35:52,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 14:35:52,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 14:35:52,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 14:35:52,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 14:35:52,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 14:35:52,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 14:35:52,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 14:35:52,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 14:35:52,487 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 14:35:52,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 14:35:52,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 14:35:52,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 14:35:52,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 14:35:52,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:35:52,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 14:35:52,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 14:35:52,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 14:35:52,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 14:35:52,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 14:35:52,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 14:35:52,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 14:35:52,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc4d2acb145e333c6a4b88114f00bb3ad7905a78 [2021-08-29 14:35:52,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 14:35:52,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 14:35:52,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 14:35:52,830 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 14:35:52,830 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 14:35:52,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2021-08-29 14:35:52,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9eb1bb5/f41ca02b83824fd395ab409e04950a65/FLAG26a0908a7 [2021-08-29 14:35:53,179 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 14:35:53,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2021-08-29 14:35:53,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9eb1bb5/f41ca02b83824fd395ab409e04950a65/FLAG26a0908a7 [2021-08-29 14:35:53,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9eb1bb5/f41ca02b83824fd395ab409e04950a65 [2021-08-29 14:35:53,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 14:35:53,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 14:35:53,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 14:35:53,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 14:35:53,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 14:35:53,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c0f8b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53, skipping insertion in model container [2021-08-29 14:35:53,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 14:35:53,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 14:35:53,728 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/prodbin-ll_valuebound5.c[537,550] [2021-08-29 14:35:53,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:35:53,743 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 14:35:53,762 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/prodbin-ll_valuebound5.c[537,550] [2021-08-29 14:35:53,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:35:53,773 INFO L208 MainTranslator]: Completed translation [2021-08-29 14:35:53,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53 WrapperNode [2021-08-29 14:35:53,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 14:35:53,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 14:35:53,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 14:35:53,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 14:35:53,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 14:35:53,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 14:35:53,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 14:35:53,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 14:35:53,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 14:35:53,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 14:35:53,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 14:35:53,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 14:35:53,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (1/1) ... [2021-08-29 14:35:53,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:35:53,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:35:53,861 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 14:35:53,881 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 14:35:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 14:35:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 14:35:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 14:35:53,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 14:35:54,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 14:35:54,003 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-08-29 14:35:54,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:35:54 BoogieIcfgContainer [2021-08-29 14:35:54,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 14:35:54,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 14:35:54,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 14:35:54,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 14:35:54,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:35:53" (1/3) ... [2021-08-29 14:35:54,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c7a14c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:35:54, skipping insertion in model container [2021-08-29 14:35:54,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:35:53" (2/3) ... [2021-08-29 14:35:54,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c7a14c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:35:54, skipping insertion in model container [2021-08-29 14:35:54,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:35:54" (3/3) ... [2021-08-29 14:35:54,010 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.c [2021-08-29 14:35:54,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 14:35:54,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-29 14:35:54,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 14:35:54,051 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 14:35:54,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-29 14:35:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 20 states have (on average 1.55) internal successors, (31), 22 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 14:35:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 14:35:54,063 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:35:54,063 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:35:54,064 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:35:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:35:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-08-29 14:35:54,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:35:54,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872910187] [2021-08-29 14:35:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:35:54,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:35:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:35:54,189 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 14:35:54,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:35:54,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872910187] [2021-08-29 14:35:54,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872910187] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:35:54,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:35:54,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 14:35:54,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726765940] [2021-08-29 14:35:54,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 14:35:54,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:35:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 14:35:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:35:54,221 INFO L87 Difference]: Start difference. First operand has 23 states, 20 states have (on average 1.55) internal successors, (31), 22 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:35:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:35:54,271 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2021-08-29 14:35:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 14:35:54,273 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 14:35:54,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:35:54,278 INFO L225 Difference]: With dead ends: 43 [2021-08-29 14:35:54,278 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 14:35:54,280 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:35:54,282 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.82ms IncrementalHoareTripleChecker+Time [2021-08-29 14:35:54,282 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.21ms Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 38.82ms Time] [2021-08-29 14:35:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 14:35:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-29 14:35:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:35:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-29 14:35:54,302 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2021-08-29 14:35:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:35:54,302 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-29 14:35:54,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:35:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-29 14:35:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 14:35:54,303 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:35:54,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:35:54,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 14:35:54,304 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:35:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:35:54,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-08-29 14:35:54,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:35:54,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764069168] [2021-08-29 14:35:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:35:54,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:35:54,317 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:35:54,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38278665] [2021-08-29 14:35:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:35:54,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:35:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:35:54,345 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 14:35:54,373 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 14:35:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:35:54,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:35:54,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:35:54,485 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 14:35:54,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:35:54,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:35:54,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764069168] [2021-08-29 14:35:54,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:35:54,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38278665] [2021-08-29 14:35:54,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38278665] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:35:54,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:35:54,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 14:35:54,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595565225] [2021-08-29 14:35:54,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:35:54,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:35:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:35:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:35:54,488 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:35:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:35:54,543 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-08-29 14:35:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:35:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 14:35:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:35:54,544 INFO L225 Difference]: With dead ends: 32 [2021-08-29 14:35:54,544 INFO L226 Difference]: Without dead ends: 30 [2021-08-29 14:35:54,545 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.74ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:35:54,546 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.63ms IncrementalHoareTripleChecker+Time [2021-08-29 14:35:54,546 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 41.63ms Time] [2021-08-29 14:35:54,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-29 14:35:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2021-08-29 14:35:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:35:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-29 14:35:54,550 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2021-08-29 14:35:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:35:54,550 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-29 14:35:54,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:35:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-29 14:35:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 14:35:54,551 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:35:54,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:35:54,581 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 14:35:54,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:35:54,785 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:35:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:35:54,788 INFO L82 PathProgramCache]: Analyzing trace with hash -937526112, now seen corresponding path program 1 times [2021-08-29 14:35:54,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:35:54,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711521687] [2021-08-29 14:35:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:35:54,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:35:54,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:35:54,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093429477] [2021-08-29 14:35:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:35:54,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:35:54,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:35:54,845 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 14:35:54,880 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 14:35:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:35:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 14:35:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:35:55,008 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 14:35:55,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:35:55,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:35:55,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711521687] [2021-08-29 14:35:55,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:35:55,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093429477] [2021-08-29 14:35:55,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093429477] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:35:55,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:35:55,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 14:35:55,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413776406] [2021-08-29 14:35:55,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 14:35:55,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:35:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 14:35:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:35:55,011 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:35:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:35:55,088 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-08-29 14:35:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:35:55,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 14:35:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:35:55,090 INFO L225 Difference]: With dead ends: 28 [2021-08-29 14:35:55,090 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 14:35:55,090 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.27ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:35:55,092 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.94ms IncrementalHoareTripleChecker+Time [2021-08-29 14:35:55,093 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 45.94ms Time] [2021-08-29 14:35:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 14:35:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-08-29 14:35:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 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 14:35:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-29 14:35:55,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2021-08-29 14:35:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:35:55,099 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-29 14:35:55,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:35:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-29 14:35:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 14:35:55,101 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:35:55,101 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:35:55,121 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 14:35:55,319 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,SelfDestructingSolverStorable2 [2021-08-29 14:35:55,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:35:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:35:55,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1030171456, now seen corresponding path program 1 times [2021-08-29 14:35:55,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:35:55,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967017823] [2021-08-29 14:35:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:35:55,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:35:55,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:35:55,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630904257] [2021-08-29 14:35:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:35:55,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:35:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:35:55,338 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 14:35:55,341 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 14:35:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:35:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 14:35:55,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:36:00,360 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 14:36:00,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:36:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:36:04,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:36:04,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967017823] [2021-08-29 14:36:04,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:36:04,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630904257] [2021-08-29 14:36:04,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630904257] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:36:04,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:36:04,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-29 14:36:04,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971699458] [2021-08-29 14:36:04,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 14:36:04,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:36:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 14:36:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-29 14:36:04,156 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 14:36:06,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:36:10,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:36:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:36:11,607 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-08-29 14:36:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 14:36:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 16 [2021-08-29 14:36:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:36:11,609 INFO L225 Difference]: With dead ends: 47 [2021-08-29 14:36:11,609 INFO L226 Difference]: Without dead ends: 45 [2021-08-29 14:36:11,609 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 6065.71ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-29 14:36:11,610 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4699.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4736.82ms IncrementalHoareTripleChecker+Time [2021-08-29 14:36:11,610 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 178 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [27 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 4736.82ms Time] [2021-08-29 14:36:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-29 14:36:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-08-29 14:36:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:36:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-08-29 14:36:11,614 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 16 [2021-08-29 14:36:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:36:11,632 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-08-29 14:36:11,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 14:36:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-08-29 14:36:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 14:36:11,634 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:36:11,635 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:36:11,653 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 14:36:11,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:11,854 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:36:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:36:11,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1032018498, now seen corresponding path program 1 times [2021-08-29 14:36:11,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:36:11,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736851945] [2021-08-29 14:36:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:36:11,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:36:11,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:36:11,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042531406] [2021-08-29 14:36:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:36:11,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:36:11,871 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 14:36:11,886 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 14:36:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:36:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 14:36:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:36:13,228 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 14:36:13,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:36:13,655 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 14:36:13,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:36:13,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736851945] [2021-08-29 14:36:13,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:36:13,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042531406] [2021-08-29 14:36:13,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042531406] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:36:13,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:36:13,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-29 14:36:13,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685611173] [2021-08-29 14:36:13,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-29 14:36:13,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:36:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-29 14:36:13,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-29 14:36:13,657 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 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 14:36:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:36:15,099 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2021-08-29 14:36:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 14:36:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 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) Word has length 16 [2021-08-29 14:36:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:36:15,101 INFO L225 Difference]: With dead ends: 68 [2021-08-29 14:36:15,101 INFO L226 Difference]: Without dead ends: 62 [2021-08-29 14:36:15,102 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1230.98ms TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2021-08-29 14:36:15,102 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 115 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 407.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 427.25ms IncrementalHoareTripleChecker+Time [2021-08-29 14:36:15,102 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 0 Invalid, 249 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [57 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 427.25ms Time] [2021-08-29 14:36:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-29 14:36:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2021-08-29 14:36:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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 14:36:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-08-29 14:36:15,107 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2021-08-29 14:36:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:36:15,107 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-08-29 14:36:15,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 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 14:36:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-08-29 14:36:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 14:36:15,107 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:36:15,107 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:36:15,133 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 14:36:15,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:15,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:36:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:36:15,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1993537895, now seen corresponding path program 1 times [2021-08-29 14:36:15,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:36:15,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768315785] [2021-08-29 14:36:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:36:15,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:36:15,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:36:15,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991936300] [2021-08-29 14:36:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:36:15,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:15,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:36:15,335 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 14:36:15,336 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 14:36:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:36:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 14:36:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:36:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 14:36:15,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:36:15,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:36:15,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768315785] [2021-08-29 14:36:15,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:36:15,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991936300] [2021-08-29 14:36:15,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991936300] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:36:15,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:36:15,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 14:36:15,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677005632] [2021-08-29 14:36:15,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:36:15,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:36:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:36:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-29 14:36:15,485 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 14:36:17,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:36:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:36:17,998 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-08-29 14:36:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 14:36:17,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 19 [2021-08-29 14:36:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:36:17,999 INFO L225 Difference]: With dead ends: 41 [2021-08-29 14:36:17,999 INFO L226 Difference]: Without dead ends: 37 [2021-08-29 14:36:17,999 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.96ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:36:18,000 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2496.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 2503.77ms IncrementalHoareTripleChecker+Time [2021-08-29 14:36:18,000 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.30ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 1 Unknown, 18 Unchecked, 2503.77ms Time] [2021-08-29 14:36:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-29 14:36:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-08-29 14:36:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:36:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-29 14:36:18,003 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2021-08-29 14:36:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:36:18,003 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-29 14:36:18,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 14:36:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-29 14:36:18,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 14:36:18,004 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:36:18,004 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:36:18,021 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 14:36:18,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:18,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:36:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:36:18,213 INFO L82 PathProgramCache]: Analyzing trace with hash 324093410, now seen corresponding path program 1 times [2021-08-29 14:36:18,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:36:18,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571035666] [2021-08-29 14:36:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:36:18,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:36:18,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:36:18,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361131950] [2021-08-29 14:36:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:36:18,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:18,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:36:18,233 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 14:36:18,249 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 14:36:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:36:18,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 14:36:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:36:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:36:18,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:36:18,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:36:18,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571035666] [2021-08-29 14:36:18,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:36:18,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361131950] [2021-08-29 14:36:18,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361131950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:36:18,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:36:18,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-29 14:36:18,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199742880] [2021-08-29 14:36:18,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 14:36:18,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:36:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 14:36:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:36:18,676 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 14:36:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:36:18,837 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-08-29 14:36:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 14:36:18,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) Word has length 26 [2021-08-29 14:36:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:36:18,838 INFO L225 Difference]: With dead ends: 57 [2021-08-29 14:36:18,838 INFO L226 Difference]: Without dead ends: 40 [2021-08-29 14:36:18,838 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 167.82ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-29 14:36:18,838 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.60ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.04ms IncrementalHoareTripleChecker+Time [2021-08-29 14:36:18,839 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 179 Unknown, 0 Unchecked, 0.60ms Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 91.04ms Time] [2021-08-29 14:36:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-29 14:36:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-08-29 14:36:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:36:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-08-29 14:36:18,843 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 26 [2021-08-29 14:36:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:36:18,843 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-08-29 14:36:18,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 14:36:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-08-29 14:36:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 14:36:18,844 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:36:18,844 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:36:18,885 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 14:36:19,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:19,062 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:36:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:36:19,063 INFO L82 PathProgramCache]: Analyzing trace with hash -68933600, now seen corresponding path program 2 times [2021-08-29 14:36:19,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:36:19,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950051909] [2021-08-29 14:36:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:36:19,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:36:19,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:36:19,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375910253] [2021-08-29 14:36:19,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 14:36:19,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:36:19,071 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 14:36:19,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 14:36:19,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 14:36:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-29 14:36:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:36:19,114 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 14:36:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:36:19,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:36:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:36:20,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:36:20,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950051909] [2021-08-29 14:36:20,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:36:20,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375910253] [2021-08-29 14:36:20,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375910253] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:36:20,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:36:20,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-29 14:36:20,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247203278] [2021-08-29 14:36:20,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-29 14:36:20,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:36:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-29 14:36:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-08-29 14:36:20,054 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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 14:36:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:36:20,356 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-08-29 14:36:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 14:36:20,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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 26 [2021-08-29 14:36:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:36:20,357 INFO L225 Difference]: With dead ends: 47 [2021-08-29 14:36:20,357 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 14:36:20,358 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 547.71ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-29 14:36:20,358 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.95ms IncrementalHoareTripleChecker+Time [2021-08-29 14:36:20,358 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 159 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [20 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 77.95ms Time] [2021-08-29 14:36:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 14:36:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 14:36:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:36:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 14:36:20,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-08-29 14:36:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:36:20,359 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 14:36:20,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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 14:36:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 14:36:20,359 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 14:36:20,361 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-08-29 14:36:20,361 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-08-29 14:36:20,404 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 14:36:20,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:36:20,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 14:36:20,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:36:20,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:36:20,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:36:20,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:36:44,229 WARN L210 SmtUtils]: Spent 23.62s on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L861 garLoopResultBuilder]: At program point L48(lines 20 49) the Hoare annotation is: true [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L854 garLoopResultBuilder]: At program point L13-2(lines 36 37) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse3 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) (.cse1 (<= 1 ULTIMATE.start_main_~b~0)) (.cse2 (<= ULTIMATE.start_main_~b~0 5))) (or (and (= ULTIMATE.start_main_~z~0 0) .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 .cse2 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (let ((.cse4 (* 2 ULTIMATE.start_main_~y~0))) (and .cse0 (= .cse3 (+ ULTIMATE.start_main_~z~0 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= .cse4 4) .cse1 (< 0 (+ 2 .cse4)) .cse2)) (let ((.cse5 (+ ULTIMATE.start_main_~y~0 1))) (and .cse0 (= .cse3 ULTIMATE.start_main_~z~0) (<= 1 (mod .cse5 2)) (<= 0 .cse5) .cse1 (<= ULTIMATE.start_main_~y~0 1) .cse2)))) [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point L13-3(lines 13 16) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-08-29 14:36:44,869 INFO L858 garLoopResultBuilder]: For program point L9-1(lines 9 11) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L861 garLoopResultBuilder]: At program point L13-5(lines 12 18) the Hoare annotation is: true [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L9-2(lines 9 11) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start_main_~b~0)) (.cse2 (<= ULTIMATE.start_main_~b~0 5))) (or (and (= ULTIMATE.start_main_~z~0 0) .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) .cse1 .cse2 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (let ((.cse3 (* 2 ULTIMATE.start_main_~y~0))) (and .cse0 (= (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0) (+ ULTIMATE.start_main_~z~0 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= .cse3 4) .cse1 (< 0 (+ 2 .cse3)) .cse2)))) [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L34-3(lines 34 45) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L14-1(lines 14 15) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L10-2(line 10) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L10-4(line 10) no Hoare annotation was computed. [2021-08-29 14:36:44,870 INFO L858 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2021-08-29 14:36:44,873 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 14:36:44,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:36:44 BoogieIcfgContainer [2021-08-29 14:36:44,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 14:36:44,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 14:36:44,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 14:36:44,897 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 14:36:44,898 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:35:54" (3/4) ... [2021-08-29 14:36:44,924 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 14:36:44,930 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-08-29 14:36:44,931 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 14:36:44,931 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:36:44,931 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:36:44,979 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 14:36:44,979 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 14:36:44,980 INFO L158 Benchmark]: Toolchain (without parser) took 51356.43ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 30.6MB in the beginning and 33.3MB in the end (delta: -2.7MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2021-08-29 14:36:44,980 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 52.4MB. Free memory was 35.3MB in the beginning and 35.3MB in the end (delta: 39.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:36:44,980 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.28ms. Allocated memory is still 52.4MB. Free memory was 30.4MB in the beginning and 36.3MB in the end (delta: -5.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 14:36:44,980 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.89ms. Allocated memory is still 52.4MB. Free memory was 36.3MB in the beginning and 36.3MB in the end (delta: 4.1kB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2021-08-29 14:36:44,980 INFO L158 Benchmark]: Boogie Preprocessor took 11.77ms. Allocated memory is still 52.4MB. Free memory was 36.3MB in the beginning and 35.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 14:36:44,981 INFO L158 Benchmark]: RCFGBuilder took 163.02ms. Allocated memory is still 52.4MB. Free memory was 35.1MB in the beginning and 26.4MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 14:36:44,981 INFO L158 Benchmark]: TraceAbstraction took 50890.82ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 25.9MB in the beginning and 36.4MB in the end (delta: -10.5MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2021-08-29 14:36:44,981 INFO L158 Benchmark]: Witness Printer took 82.39ms. Allocated memory is still 65.0MB. Free memory was 36.4MB in the beginning and 33.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 14:36:44,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 52.4MB. Free memory was 35.3MB in the beginning and 35.3MB in the end (delta: 39.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.28ms. Allocated memory is still 52.4MB. Free memory was 30.4MB in the beginning and 36.3MB in the end (delta: -5.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.89ms. Allocated memory is still 52.4MB. Free memory was 36.3MB in the beginning and 36.3MB in the end (delta: 4.1kB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.77ms. Allocated memory is still 52.4MB. Free memory was 36.3MB in the beginning and 35.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 163.02ms. Allocated memory is still 52.4MB. Free memory was 35.1MB in the beginning and 26.4MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 50890.82ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 25.9MB in the beginning and 36.4MB in the end (delta: -10.5MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * Witness Printer took 82.39ms. Allocated memory is still 65.0MB. Free memory was 36.4MB in the beginning and 33.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 50827.09ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 10.02ms, AutomataDifference: 12118.05ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 24306.42ms, InitialAbstractionConstructionTime: 5.97ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 276 SdHoareTripleChecker+Valid, 7963.23ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 276 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 7847.62ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 18 IncrementalHoareTripleChecker+Unchecked, 245 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 851 IncrementalHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 0 mSDtfsCounter, 851 mSolverCounterSat, 7.04ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 8120.21ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, 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: 32.71ms AutomataMinimizationTime, 8 MinimizatonAttempts, 53 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 19 NumberOfFragments, 143 HoareAnnotationTreeSize, 4 FomulaSimplifications, 242 FormulaSimplificationTreeSizeReduction, 39.55ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 24261.93ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 44.96ms SsaConstructionTime, 111.34ms SatisfiabilityAnalysisTime, 12206.22ms InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 186 ConstructedInterpolants, 3 QuantifiedInterpolants, 2058 SizeOfPredicates, 43 NumberOfNonLiveVariables, 607 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 56/74 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((z == 0 && cond == 1) && a == x) && 1 == cond) && 1 <= b) && b <= 5) && b == y) || ((((((cond == 1 && a * b == z + x * y) && 1 <= cond) && 2 * y <= 4) && 1 <= b) && 0 < 2 + 2 * y) && b <= 5)) || ((((((cond == 1 && a * b == z) && 1 <= (y + 1) % 2) && 0 <= y + 1) && 1 <= b) && y <= 1) && b <= 5) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((z == 0 && cond == 1) && a == x) && 1 <= b) && b <= 5) && b == y) || ((((((cond == 1 && a * b == z + x * y) && 1 <= cond) && 2 * y <= 4) && 1 <= b) && 0 < 2 + 2 * y) && b <= 5) - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 14:36:45,005 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...