./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound2.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 6ce961dac043765dba705431aaca591312528e9c ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 06:29:00,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 06:29:00,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 06:29:00,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 06:29:00,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 06:29:00,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 06:29:00,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 06:29:00,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 06:29:00,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 06:29:00,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 06:29:00,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 06:29:00,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 06:29:00,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 06:29:00,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 06:29:00,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 06:29:00,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 06:29:00,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 06:29:00,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 06:29:00,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 06:29:00,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 06:29:00,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 06:29:00,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 06:29:00,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 06:29:00,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 06:29:00,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 06:29:00,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 06:29:00,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 06:29:00,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 06:29:00,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 06:29:00,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 06:29:00,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 06:29:00,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 06:29:00,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 06:29:00,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 06:29:00,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 06:29:00,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 06:29:00,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 06:29:00,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 06:29:00,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 06:29:00,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 06:29:00,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 06:29:00,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 06:29:00,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 06:29:00,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 06:29:00,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 06:29:00,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 06:29:00,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 06:29:00,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 06:29:00,747 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 06:29:00,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 06:29:00,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 06:29:00,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 06:29:00,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 06:29:00,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 06:29:00,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 06:29:00,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 06:29:00,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 06:29:00,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 06:29:00,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 06:29:00,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 06:29:00,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 06:29:00,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 06:29:00,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 06:29:00,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 06:29:00,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 06:29:00,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 06:29:00,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 06:29:00,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 06:29:00,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 06:29:00,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 06:29:00,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 06:29:00,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 06:29:00,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ce961dac043765dba705431aaca591312528e9c [2021-08-26 06:29:00,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 06:29:01,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 06:29:01,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 06:29:01,013 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 06:29:01,013 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 06:29:01,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound2.c [2021-08-26 06:29:01,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e406ef78e/f3b7a8c7a7c3490fb81277936d4aab41/FLAG2d18d5554 [2021-08-26 06:29:01,355 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 06:29:01,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_valuebound2.c [2021-08-26 06:29:01,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e406ef78e/f3b7a8c7a7c3490fb81277936d4aab41/FLAG2d18d5554 [2021-08-26 06:29:01,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e406ef78e/f3b7a8c7a7c3490fb81277936d4aab41 [2021-08-26 06:29:01,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 06:29:01,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 06:29:01,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 06:29:01,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 06:29:01,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 06:29:01,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:01,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b71c1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01, skipping insertion in model container [2021-08-26 06:29:01,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:01,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 06:29:01,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 06:29:01,913 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/geo1-ll_valuebound2.c[546,559] [2021-08-26 06:29:01,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 06:29:01,926 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 06:29:01,964 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/geo1-ll_valuebound2.c[546,559] [2021-08-26 06:29:01,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 06:29:01,976 INFO L208 MainTranslator]: Completed translation [2021-08-26 06:29:01,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01 WrapperNode [2021-08-26 06:29:01,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 06:29:01,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 06:29:01,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 06:29:01,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 06:29:01,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:01,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 06:29:02,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 06:29:02,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 06:29:02,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 06:29:02,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 06:29:02,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 06:29:02,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 06:29:02,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 06:29:02,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (1/1) ... [2021-08-26 06:29:02,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 06:29:02,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:29:02,078 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) [2021-08-26 06:29:02,097 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 [2021-08-26 06:29:02,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 06:29:02,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 06:29:02,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 06:29:02,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 06:29:02,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 06:29:02,323 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-26 06:29:02,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:29:02 BoogieIcfgContainer [2021-08-26 06:29:02,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 06:29:02,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 06:29:02,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 06:29:02,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 06:29:02,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:29:01" (1/3) ... [2021-08-26 06:29:02,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c97f2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:29:02, skipping insertion in model container [2021-08-26 06:29:02,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:01" (2/3) ... [2021-08-26 06:29:02,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c97f2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:29:02, skipping insertion in model container [2021-08-26 06:29:02,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:29:02" (3/3) ... [2021-08-26 06:29:02,328 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_valuebound2.c [2021-08-26 06:29:02,331 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 06:29:02,331 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 06:29:02,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 06:29:02,381 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 [2021-08-26 06:29:02,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 06:29:02,401 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) [2021-08-26 06:29:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 06:29:02,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:29:02,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:29:02,405 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:29:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:29:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash -144177098, now seen corresponding path program 1 times [2021-08-26 06:29:02,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:29:02,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957532613] [2021-08-26 06:29:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:29:02,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:29:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:29:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:29:02,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:29:02,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957532613] [2021-08-26 06:29:02,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957532613] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:29:02,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:29:02,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 06:29:02,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605370796] [2021-08-26 06:29:02,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 06:29:02,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:29:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 06:29:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 06:29:02,513 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-08-26 06:29:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:29:02,522 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2021-08-26 06:29:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 06:29:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 06:29:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:29:02,528 INFO L225 Difference]: With dead ends: 43 [2021-08-26 06:29:02,528 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 06:29:02,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 06:29:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 06:29:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-26 06:29:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 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) [2021-08-26 06:29:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-08-26 06:29:02,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 13 [2021-08-26 06:29:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:29:02,554 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-08-26 06:29:02,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-08-26 06:29:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-08-26 06:29:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 06:29:02,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:29:02,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:29:02,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 06:29:02,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:29:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:29:02,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1281167042, now seen corresponding path program 1 times [2021-08-26 06:29:02,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:29:02,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720111323] [2021-08-26 06:29:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:29:02,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:29:02,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:29:02,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357320649] [2021-08-26 06:29:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:29:02,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:29:02,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:29:02,575 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) [2021-08-26 06:29:02,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 06:29:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:29:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 06:29:02,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:29:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:29:02,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:29:02,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720111323] [2021-08-26 06:29:02,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:29:02,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357320649] [2021-08-26 06:29:02,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357320649] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:29:02,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:29:02,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 06:29:02,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889301408] [2021-08-26 06:29:02,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 06:29:02,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:29:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 06:29:02,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 06:29:02,988 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2021-08-26 06:29:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:29:03,115 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-08-26 06:29:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 06:29:03,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 06:29:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:29:03,117 INFO L225 Difference]: With dead ends: 29 [2021-08-26 06:29:03,117 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 06:29:03,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-26 06:29:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 06:29:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-08-26 06:29:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 21 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) [2021-08-26 06:29:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-08-26 06:29:03,126 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-08-26 06:29:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:29:03,126 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-08-26 06:29:03,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2021-08-26 06:29:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-08-26 06:29:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 06:29:03,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:29:03,128 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:29:03,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 06:29:03,337 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 [2021-08-26 06:29:03,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:29:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:29:03,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2131965670, now seen corresponding path program 1 times [2021-08-26 06:29:03,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:29:03,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462483389] [2021-08-26 06:29:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:29:03,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:29:03,349 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:29:03,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842824107] [2021-08-26 06:29:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:29:03,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:29:03,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:29:03,353 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) [2021-08-26 06:29:03,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 06:29:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 06:29:03,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 06:29:03,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:29:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:29:03,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:29:03,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462483389] [2021-08-26 06:29:03,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:29:03,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842824107] [2021-08-26 06:29:03,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842824107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 06:29:03,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 06:29:03,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 06:29:03,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121473345] [2021-08-26 06:29:03,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 06:29:03,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:29:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 06:29:03,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-26 06:29:03,670 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:29:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:29:03,802 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-08-26 06:29:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 06:29:03,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 06:29:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:29:03,804 INFO L225 Difference]: With dead ends: 32 [2021-08-26 06:29:03,804 INFO L226 Difference]: Without dead ends: 26 [2021-08-26 06:29:03,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-26 06:29:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-26 06:29:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-08-26 06:29:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 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) [2021-08-26 06:29:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-08-26 06:29:03,811 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 16 [2021-08-26 06:29:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:29:03,812 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-08-26 06:29:03,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 06:29:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-08-26 06:29:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 06:29:03,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 06:29:03,812 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 06:29:03,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 06:29:04,028 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 [2021-08-26 06:29:04,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 06:29:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 06:29:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash -582143938, now seen corresponding path program 2 times [2021-08-26 06:29:04,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 06:29:04,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593285717] [2021-08-26 06:29:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 06:29:04,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 06:29:04,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 06:29:04,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341646742] [2021-08-26 06:29:04,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 06:29:04,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 06:29:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 06:29:04,041 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) [2021-08-26 06:29:04,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 06:29:04,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 06:29:04,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 06:29:04,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 06:29:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 06:29:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 06:29:04,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 06:29:04,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593285717] [2021-08-26 06:29:04,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 06:29:04,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341646742] [2021-08-26 06:29:04,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341646742] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 06:29:04,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 06:29:04,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 06:29:04,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046922261] [2021-08-26 06:29:04,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 06:29:04,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 06:29:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 06:29:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 06:29:04,297 INFO L87 Difference]: Start difference. First operand 25 states and 25 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) [2021-08-26 06:29:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 06:29:04,329 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-08-26 06:29:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 06:29:04,329 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 [2021-08-26 06:29:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 06:29:04,330 INFO L225 Difference]: With dead ends: 25 [2021-08-26 06:29:04,330 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 06:29:04,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-26 06:29:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 06:29:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 06:29:04,331 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) [2021-08-26 06:29:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 06:29:04,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-08-26 06:29:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 06:29:04,332 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 06:29:04,332 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) [2021-08-26 06:29:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 06:29:04,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 06:29:04,334 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 06:29:04,335 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 06:29:04,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 06:29:04,548 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 [2021-08-26 06:29:04,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 06:29:04,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 06:29:04,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 06:29:04,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 06:29:04,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 06:29:04,666 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-08-26 06:29:04,667 INFO L853 garLoopResultBuilder]: At program point L36-2(lines 36 46) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~z~0)) (.cse1 (<= 0 ULTIMATE.start_main_~k~0)) (.cse2 (<= ULTIMATE.start_main_~z~0 2)) (.cse3 (<= ULTIMATE.start_main_~k~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~x~0 1) (= ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse3 (= ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0)) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~z~0 1)) (<= 2 ULTIMATE.start_main_~c~0)))) [2021-08-26 06:29:04,667 INFO L857 garLoopResultBuilder]: For program point L36-3(lines 36 46) no Hoare annotation was computed. [2021-08-26 06:29:04,667 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 06:29:04,667 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 06:29:04,667 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 06:29:04,668 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-08-26 06:29:04,668 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-08-26 06:29:04,668 INFO L853 garLoopResultBuilder]: At program point L16-2(lines 39 40) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~z~0)) (.cse1 (<= 0 ULTIMATE.start_main_~k~0)) (.cse2 (<= ULTIMATE.start_main_~z~0 2)) (.cse3 (<= ULTIMATE.start_main_~k~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~x~0 1) (= ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse3 (= ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0)) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~z~0 1)) (<= 2 ULTIMATE.start_main_~c~0)))) [2021-08-26 06:29:04,668 INFO L857 garLoopResultBuilder]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2021-08-26 06:29:04,668 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-08-26 06:29:04,668 INFO L857 garLoopResultBuilder]: For program point L12-1(lines 12 14) no Hoare annotation was computed. [2021-08-26 06:29:04,668 INFO L860 garLoopResultBuilder]: At program point L16-5(lines 15 21) the Hoare annotation is: true [2021-08-26 06:29:04,669 INFO L857 garLoopResultBuilder]: For program point L12-2(lines 12 14) no Hoare annotation was computed. [2021-08-26 06:29:04,669 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 14) no Hoare annotation was computed. [2021-08-26 06:29:04,669 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 06:29:04,670 INFO L857 garLoopResultBuilder]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-08-26 06:29:04,672 INFO L857 garLoopResultBuilder]: For program point L17-1(lines 17 18) no Hoare annotation was computed. [2021-08-26 06:29:04,674 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-08-26 06:29:04,674 INFO L857 garLoopResultBuilder]: For program point L13-2(line 13) no Hoare annotation was computed. [2021-08-26 06:29:04,674 INFO L857 garLoopResultBuilder]: For program point L13-4(line 13) no Hoare annotation was computed. [2021-08-26 06:29:04,675 INFO L857 garLoopResultBuilder]: For program point L13-6(line 13) no Hoare annotation was computed. [2021-08-26 06:29:04,675 INFO L860 garLoopResultBuilder]: At program point L51(lines 22 52) the Hoare annotation is: true [2021-08-26 06:29:04,679 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 06:29:04,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:29:04 BoogieIcfgContainer [2021-08-26 06:29:04,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 06:29:04,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 06:29:04,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 06:29:04,689 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 06:29:04,690 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:29:02" (3/4) ... [2021-08-26 06:29:04,692 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 06:29:04,701 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-26 06:29:04,702 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 06:29:04,702 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 06:29:04,702 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 06:29:04,732 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 06:29:04,732 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 06:29:04,733 INFO L168 Benchmark]: Toolchain (without parser) took 2939.61 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 32.1 MB in the beginning and 27.4 MB in the end (delta: 4.8 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. [2021-08-26 06:29:04,734 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 36.7 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 06:29:04,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.71 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.9 MB in the beginning and 50.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-08-26 06:29:04,734 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.67 ms. Allocated memory is still 67.1 MB. Free memory was 50.1 MB in the beginning and 48.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 06:29:04,735 INFO L168 Benchmark]: Boogie Preprocessor took 40.70 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 47.7 MB in the end (delta: 973.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 06:29:04,735 INFO L168 Benchmark]: RCFGBuilder took 273.95 ms. Allocated memory is still 67.1 MB. Free memory was 47.5 MB in the beginning and 49.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-08-26 06:29:04,735 INFO L168 Benchmark]: TraceAbstraction took 2364.02 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 48.8 MB in the beginning and 30.2 MB in the end (delta: 18.7 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2021-08-26 06:29:04,735 INFO L168 Benchmark]: Witness Printer took 43.11 ms. Allocated memory is still 81.8 MB. Free memory was 30.2 MB in the beginning and 27.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 06:29:04,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 36.7 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.71 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.9 MB in the beginning and 50.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.67 ms. Allocated memory is still 67.1 MB. Free memory was 50.1 MB in the beginning and 48.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.70 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 47.7 MB in the end (delta: 973.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 273.95 ms. Allocated memory is still 67.1 MB. Free memory was 47.5 MB in the beginning and 49.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2364.02 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 48.8 MB in the beginning and 30.2 MB in the end (delta: 18.7 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. * Witness Printer took 43.11 ms. Allocated memory is still 81.8 MB. Free memory was 30.2 MB in the beginning and 27.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 18]: 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: 2310.2ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 6.8ms, AutomataDifference: 328.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 116.3ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 71 SDslu, 94 SDs, 0 SdLazy, 139 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 98.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 312.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 10 NumberOfFragments, 109 HoareAnnotationTreeSize, 4 FomulaSimplifications, 18 FormulaSimplificationTreeSizeReduction, 33.9ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 77.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 23.0ms SsaConstructionTime, 59.4ms SatisfiabilityAnalysisTime, 819.5ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 389 SizeOfPredicates, 20 NumberOfNonLiveVariables, 252 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 7/9 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: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((1 <= z && 0 <= k) && z <= 2) && k <= 2) && 1 == cond) && 1 <= c) && x == 1) && z == y) || (((((((1 <= z && 0 <= k) && z <= 2) && 1 <= cond) && k <= 2) && y == z * z) && x == z + 1) && 2 <= c) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((1 <= z && 0 <= k) && z <= 2) && k <= 2) && 1 <= c) && x == 1) && z == y) || (((((((1 <= z && 0 <= k) && z <= 2) && 1 <= cond) && k <= 2) && y == z * z) && x == z + 1) && 2 <= c) RESULT: Ultimate proved your program to be correct! [2021-08-26 06:29:04,777 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...