./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.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_unwindbound5.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 883e81d957d496aa921590044a651c56d6b0f271 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 14:33:08,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 14:33:08,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 14:33:08,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 14:33:08,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 14:33:08,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 14:33:08,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 14:33:08,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 14:33:08,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 14:33:08,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 14:33:08,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 14:33:08,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 14:33:08,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 14:33:08,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 14:33:08,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 14:33:08,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 14:33:08,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 14:33:08,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 14:33:08,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 14:33:08,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 14:33:08,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 14:33:08,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 14:33:08,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 14:33:08,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 14:33:08,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 14:33:08,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 14:33:08,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 14:33:08,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 14:33:08,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 14:33:08,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 14:33:08,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 14:33:08,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 14:33:08,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 14:33:08,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 14:33:08,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 14:33:08,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 14:33:08,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 14:33:08,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 14:33:08,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 14:33:08,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 14:33:08,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 14:33:08,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 14:33:08,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 14:33:08,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 14:33:08,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 14:33:08,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 14:33:08,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 14:33:08,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 14:33:08,878 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 14:33:08,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 14:33:08,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 14:33:08,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 14:33:08,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 14:33:08,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 14:33:08,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 14:33:08,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 14:33:08,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 14:33:08,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 14:33:08,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 14:33:08,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 14:33:08,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 14:33:08,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 14:33:08,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 14:33:08,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 14:33:08,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:33:08,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 14:33:08,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 14:33:08,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 14:33:08,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 14:33:08,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 14:33:08,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 14:33:08,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 14:33:08,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 883e81d957d496aa921590044a651c56d6b0f271 [2021-08-29 14:33:09,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 14:33:09,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 14:33:09,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 14:33:09,132 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 14:33:09,132 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 14:33:09,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2021-08-29 14:33:09,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/550362f29/f6ad58cbd5d24366a1b878bfca93bf66/FLAGf9b8744ff [2021-08-29 14:33:09,586 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 14:33:09,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2021-08-29 14:33:09,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/550362f29/f6ad58cbd5d24366a1b878bfca93bf66/FLAGf9b8744ff [2021-08-29 14:33:09,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/550362f29/f6ad58cbd5d24366a1b878bfca93bf66 [2021-08-29 14:33:09,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 14:33:09,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 14:33:09,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 14:33:09,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 14:33:09,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 14:33:09,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:33:09" (1/1) ... [2021-08-29 14:33:09,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcef489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:09, skipping insertion in model container [2021-08-29 14:33:09,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:33:09" (1/1) ... [2021-08-29 14:33:09,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 14:33:09,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 14:33:10,116 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_unwindbound5.c[537,550] [2021-08-29 14:33:10,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:33:10,143 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 14:33:10,150 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_unwindbound5.c[537,550] [2021-08-29 14:33:10,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:33:10,177 INFO L208 MainTranslator]: Completed translation [2021-08-29 14:33:10,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10 WrapperNode [2021-08-29 14:33:10,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 14:33:10,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 14:33:10,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 14:33:10,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 14:33:10,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 14:33:10,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 14:33:10,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 14:33:10,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 14:33:10,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 14:33:10,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 14:33:10,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 14:33:10,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 14:33:10,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (1/1) ... [2021-08-29 14:33:10,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:33:10,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:10,315 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 14:33:10,368 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 14:33:10,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 14:33:10,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 14:33:10,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 14:33:10,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 14:33:10,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 14:33:10,523 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 14:33:10,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:33:10 BoogieIcfgContainer [2021-08-29 14:33:10,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 14:33:10,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 14:33:10,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 14:33:10,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 14:33:10,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:33:09" (1/3) ... [2021-08-29 14:33:10,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b01cb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:33:10, skipping insertion in model container [2021-08-29 14:33:10,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:10" (2/3) ... [2021-08-29 14:33:10,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b01cb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:33:10, skipping insertion in model container [2021-08-29 14:33:10,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:33:10" (3/3) ... [2021-08-29 14:33:10,532 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.c [2021-08-29 14:33:10,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 14:33:10,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-29 14:33:10,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 14:33:10,580 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 14:33:10,581 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-29 14:33:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 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 14:33:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 14:33:10,596 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:10,597 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:10,597 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-08-29 14:33:10,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:10,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013711266] [2021-08-29 14:33:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:10,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:10,754 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 14:33:10,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:10,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013711266] [2021-08-29 14:33:10,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013711266] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:10,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:10,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 14:33:10,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464504785] [2021-08-29 14:33:10,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 14:33:10,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:10,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 14:33:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:33:10,781 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 14:33:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:10,849 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-08-29 14:33:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 14:33:10,851 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-08-29 14:33:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:10,855 INFO L225 Difference]: With dead ends: 37 [2021-08-29 14:33:10,855 INFO L226 Difference]: Without dead ends: 16 [2021-08-29 14:33:10,857 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:33:10,874 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.66ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:10,875 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.20ms Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 58.66ms Time] [2021-08-29 14:33:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-29 14:33:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-29 14:33:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 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 14:33:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-29 14:33:10,906 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-08-29 14:33:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:10,906 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-29 14:33:10,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 14:33:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-29 14:33:10,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 14:33:10,907 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:10,907 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:10,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 14:33:10,908 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:10,908 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-29 14:33:10,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:10,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645757431] [2021-08-29 14:33:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:10,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:10,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:10,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839244762] [2021-08-29 14:33:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:10,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:10,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:10,944 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 14:33:10,991 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 14:33:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:11,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:33:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:11,138 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 14:33:11,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:11,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:11,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645757431] [2021-08-29 14:33:11,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:11,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839244762] [2021-08-29 14:33:11,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839244762] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:11,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:11,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 14:33:11,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332878748] [2021-08-29 14:33:11,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:33:11,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:11,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:33:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:33:11,142 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 14:33:11,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:11,193 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-08-29 14:33:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:33:11,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-08-29 14:33:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:11,194 INFO L225 Difference]: With dead ends: 33 [2021-08-29 14:33:11,194 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 14:33:11,194 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.02ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:33:11,195 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.69ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:11,196 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 38.69ms Time] [2021-08-29 14:33:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 14:33:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-08-29 14:33:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 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 14:33:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-08-29 14:33:11,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-08-29 14:33:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:11,199 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-08-29 14:33:11,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 14:33:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-08-29 14:33:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 14:33:11,200 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:11,200 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:11,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:11,417 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 14:33:11,418 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:11,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2021-08-29 14:33:11,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:11,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551592755] [2021-08-29 14:33:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:11,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:11,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:11,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314424527] [2021-08-29 14:33:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:11,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:11,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:11,439 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 14:33:11,440 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 14:33:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:11,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 14:33:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:11,501 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 14:33:11,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:11,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:11,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551592755] [2021-08-29 14:33:11,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:11,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314424527] [2021-08-29 14:33:11,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314424527] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:11,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:11,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 14:33:11,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165268249] [2021-08-29 14:33:11,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:33:11,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:11,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:33:11,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:33:11,504 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 14:33:11,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:11,553 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-08-29 14:33:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 14:33:11,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-08-29 14:33:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:11,554 INFO L225 Difference]: With dead ends: 23 [2021-08-29 14:33:11,554 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 14:33:11,554 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.81ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:33:11,555 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.39ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:11,556 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.36ms Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 45.39ms Time] [2021-08-29 14:33:11,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 14:33:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-29 14:33:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-29 14:33:11,566 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-08-29 14:33:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:11,567 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-29 14:33:11,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 14:33:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-29 14:33:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 14:33:11,568 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:11,568 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:11,605 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 14:33:11,793 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 14:33:11,793 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1415763136, now seen corresponding path program 1 times [2021-08-29 14:33:11,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:11,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580693870] [2021-08-29 14:33:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:11,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:11,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:11,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131427731] [2021-08-29 14:33:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:11,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:11,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:11,810 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 14:33:11,819 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 14:33:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:11,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 14:33:11,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:11,920 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 14:33:11,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:11,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:11,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580693870] [2021-08-29 14:33:11,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:11,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131427731] [2021-08-29 14:33:11,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131427731] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:11,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:11,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 14:33:11,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429477009] [2021-08-29 14:33:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 14:33:11,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 14:33:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:33:11,926 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 14:33:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:12,001 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-08-29 14:33:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:33:12,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 14:33:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:12,002 INFO L225 Difference]: With dead ends: 26 [2021-08-29 14:33:12,003 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 14:33:12,004 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.31ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:33:12,005 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.18ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:12,007 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 38.18ms Time] [2021-08-29 14:33:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 14:33:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-08-29 14:33:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 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 14:33:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-29 14:33:12,014 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-08-29 14:33:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:12,014 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-29 14:33:12,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 14:33:12,015 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-29 14:33:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 14:33:12,015 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:12,015 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:12,047 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 14:33:12,215 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 14:33:12,216 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2021-08-29 14:33:12,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:12,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193643971] [2021-08-29 14:33:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:12,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:12,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:12,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532778687] [2021-08-29 14:33:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:12,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:12,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:12,229 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 14:33:12,230 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 14:33:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 14:33:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:12,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:33:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:15,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:15,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193643971] [2021-08-29 14:33:15,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:15,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532778687] [2021-08-29 14:33:15,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532778687] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:33:15,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:33:15,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-29 14:33:15,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622078670] [2021-08-29 14:33:15,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 14:33:15,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 14:33:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2021-08-29 14:33:15,734 INFO L87 Difference]: Start difference. First operand 20 states and 22 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 14:33:25,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:33:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:26,001 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-08-29 14:33:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-29 14:33:26,002 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 14 [2021-08-29 14:33:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:26,004 INFO L225 Difference]: With dead ends: 61 [2021-08-29 14:33:26,004 INFO L226 Difference]: Without dead ends: 59 [2021-08-29 14:33:26,005 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 8073.97ms TimeCoverageRelationStatistics Valid=105, Invalid=273, Unknown=2, NotChecked=0, Total=380 [2021-08-29 14:33:26,010 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4770.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4808.70ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:26,011 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 215 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [27 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 4808.70ms Time] [2021-08-29 14:33:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-29 14:33:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 33. [2021-08-29 14:33:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 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 14:33:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-08-29 14:33:26,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 14 [2021-08-29 14:33:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:26,029 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-08-29 14:33:26,029 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 14:33:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-08-29 14:33:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 14:33:26,049 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:26,049 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:26,068 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 14:33:26,265 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 14:33:26,266 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:26,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2021-08-29 14:33:26,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:26,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473607575] [2021-08-29 14:33:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:26,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:26,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:26,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536508722] [2021-08-29 14:33:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:26,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:26,297 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 14:33:26,335 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 14:33:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 14:33:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:28,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:33:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:29,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:29,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473607575] [2021-08-29 14:33:29,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:29,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536508722] [2021-08-29 14:33:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536508722] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:33:29,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:33:29,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-29 14:33:29,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038266886] [2021-08-29 14:33:29,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-29 14:33:29,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-29 14:33:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-29 14:33:29,641 INFO L87 Difference]: Start difference. First operand 33 states and 42 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 14:33:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:31,307 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2021-08-29 14:33:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-29 14:33:31,308 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 14 [2021-08-29 14:33:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:31,309 INFO L225 Difference]: With dead ends: 91 [2021-08-29 14:33:31,309 INFO L226 Difference]: Without dead ends: 85 [2021-08-29 14:33:31,310 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1586.71ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-08-29 14:33:31,310 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 148 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 528.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 549.45ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:31,310 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 0 Invalid, 255 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [59 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 549.45ms Time] [2021-08-29 14:33:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-29 14:33:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 39. [2021-08-29 14:33:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 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 14:33:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-08-29 14:33:31,317 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 14 [2021-08-29 14:33:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:31,317 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-08-29 14:33:31,317 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 14:33:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-08-29 14:33:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 14:33:31,318 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:31,318 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:31,350 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 14:33:31,528 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 14:33:31,529 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2021-08-29 14:33:31,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:31,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065991343] [2021-08-29 14:33:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:31,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:31,535 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:31,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090706077] [2021-08-29 14:33:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:31,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:31,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:31,541 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 14:33:31,542 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 14:33:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 14:33:31,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:31,604 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 14:33:31,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:33:31,650 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 14:33:31,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:31,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065991343] [2021-08-29 14:33:31,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:31,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090706077] [2021-08-29 14:33:31,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090706077] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:33:31,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:33:31,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-29 14:33:31,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675633082] [2021-08-29 14:33:31,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 14:33:31,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 14:33:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-29 14:33:31,652 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:31,720 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2021-08-29 14:33:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 14:33:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-29 14:33:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:31,721 INFO L225 Difference]: With dead ends: 69 [2021-08-29 14:33:31,721 INFO L226 Difference]: Without dead ends: 65 [2021-08-29 14:33:31,721 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.86ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:33:31,721 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.38ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.12ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:31,722 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.38ms Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 45.12ms Time] [2021-08-29 14:33:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-29 14:33:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-08-29 14:33:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 56 states have internal predecessors, (70), 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 14:33:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2021-08-29 14:33:31,726 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 15 [2021-08-29 14:33:31,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:31,726 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2021-08-29 14:33:31,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2021-08-29 14:33:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 14:33:31,727 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:31,727 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:31,749 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 14:33:31,940 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 14:33:31,941 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2021-08-29 14:33:31,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:31,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714800588] [2021-08-29 14:33:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:31,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:31,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:31,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225822532] [2021-08-29 14:33:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:31,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:31,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:31,964 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 14:33:32,011 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 14:33:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 14:33:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 14:33:32,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:32,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:32,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714800588] [2021-08-29 14:33:32,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:32,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225822532] [2021-08-29 14:33:32,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225822532] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:32,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:32,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 14:33:32,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459397306] [2021-08-29 14:33:32,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:33:32,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:33:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-29 14:33:32,177 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:34,184 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 14:33:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:34,286 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2021-08-29 14:33:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 14:33:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-29 14:33:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:34,287 INFO L225 Difference]: With dead ends: 64 [2021-08-29 14:33:34,287 INFO L226 Difference]: Without dead ends: 60 [2021-08-29 14:33:34,287 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.75ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:33:34,288 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2094.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 2101.18ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:34,288 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.22ms Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 1 Unknown, 18 Unchecked, 2101.18ms Time] [2021-08-29 14:33:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-29 14:33:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-08-29 14:33:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 56 states have internal predecessors, (65), 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 14:33:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-08-29 14:33:34,292 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 17 [2021-08-29 14:33:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:34,292 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-08-29 14:33:34,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-08-29 14:33:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 14:33:34,293 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:34,293 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:34,309 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 14:33:34,493 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 14:33:34,493 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash 851400538, now seen corresponding path program 1 times [2021-08-29 14:33:34,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:34,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086212426] [2021-08-29 14:33:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:34,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:34,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:34,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087133599] [2021-08-29 14:33:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:34,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:34,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:34,520 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:33:34,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 14:33:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-29 14:33:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:46,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:33:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 14:33:51,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:51,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086212426] [2021-08-29 14:33:51,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:51,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087133599] [2021-08-29 14:33:51,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087133599] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:33:51,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:33:51,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 21 [2021-08-29 14:33:51,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23217178] [2021-08-29 14:33:51,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-29 14:33:51,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-29 14:33:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-29 14:33:51,143 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:34:00,883 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 14:34:04,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:34:09,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:34:11,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:34:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:34:14,235 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2021-08-29 14:34:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-29 14:34:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-29 14:34:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:34:14,236 INFO L225 Difference]: With dead ends: 142 [2021-08-29 14:34:14,237 INFO L226 Difference]: Without dead ends: 140 [2021-08-29 14:34:14,237 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 17310.97ms TimeCoverageRelationStatistics Valid=400, Invalid=1321, Unknown=1, NotChecked=0, Total=1722 [2021-08-29 14:34:14,238 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11653.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 11706.98ms IncrementalHoareTripleChecker+Time [2021-08-29 14:34:14,238 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 604 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [49 Valid, 485 Invalid, 1 Unknown, 69 Unchecked, 11706.98ms Time] [2021-08-29 14:34:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-29 14:34:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 75. [2021-08-29 14:34:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 74 states have internal predecessors, (89), 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 14:34:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2021-08-29 14:34:14,244 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 26 [2021-08-29 14:34:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:34:14,244 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2021-08-29 14:34:14,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:34:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2021-08-29 14:34:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-29 14:34:14,245 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:34:14,245 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:34:14,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 14:34:14,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-29 14:34:14,446 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:34:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:34:14,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1527755738, now seen corresponding path program 2 times [2021-08-29 14:34:14,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:34:14,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727347546] [2021-08-29 14:34:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:34:14,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:34:14,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:34:14,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927582679] [2021-08-29 14:34:14,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 14:34:14,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:34:14,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:34:14,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:34:14,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 14:34:14,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 14:34:14,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 14:34:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-29 14:34:14,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:34:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:34:32,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:35:31,785 WARN L210 SmtUtils]: Spent 20.85s on a formula simplification that was a NOOP. DAG size: 79 [2021-08-29 14:35:37,117 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_ULTIMATE.start_main_~y~0 2))) (or (let ((.cse1 (div c_ULTIMATE.start_main_~y~0 2))) (let ((.cse4 (= .cse5 0)) (.cse2 (* .cse1 c_ULTIMATE.start_main_~x~0)) (.cse3 (* .cse1 (- 1))) (.cse0 (not (= c_ULTIMATE.start_main_~x~0 0)))) (and (or (and .cse0 (or (not (= 0 (mod (+ (* (- 2) .cse1 c_ULTIMATE.start_main_~x~0) (* c_ULTIMATE.start_main_~x~0 2)) (- 4)))) (not (= (mod (div (+ (* (- 2) .cse2) (* (- 2) c_ULTIMATE.start_main_~x~0)) (- 4)) c_ULTIMATE.start_main_~x~0) 0)) (<= (div (+ (- 1) (* (div (+ 2 .cse3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ .cse1 (- 5)) 2)) 2))))) .cse4) (or (not .cse4) (and (or (not (= (mod (* 2 .cse1 c_ULTIMATE.start_main_~x~0) 4) 0)) (not (= (mod (div (* 2 .cse2) 4) c_ULTIMATE.start_main_~x~0) 0)) (<= (div (+ (- 1) (* (div (+ 3 .cse3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ .cse1 (- 6)) 2)) 2))) (<= 0 (+ (div (+ (- 2) .cse1) 2) 1))) .cse0))))) (and (= .cse5 1) (<= 0 c_ULTIMATE.start_main_~y~0)))) is different from false [2021-08-29 14:35:39,514 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_ULTIMATE.start_main_~y~0 2))) (or (= c_ULTIMATE.start_main_~y~0 0) (let ((.cse1 (div c_ULTIMATE.start_main_~y~0 2))) (let ((.cse4 (= .cse5 0)) (.cse2 (* .cse1 c_ULTIMATE.start_main_~x~0)) (.cse3 (* .cse1 (- 1))) (.cse0 (not (= c_ULTIMATE.start_main_~x~0 0)))) (and (or (and .cse0 (or (not (= 0 (mod (+ (* (- 2) .cse1 c_ULTIMATE.start_main_~x~0) (* c_ULTIMATE.start_main_~x~0 2)) (- 4)))) (not (= (mod (div (+ (* (- 2) .cse2) (* (- 2) c_ULTIMATE.start_main_~x~0)) (- 4)) c_ULTIMATE.start_main_~x~0) 0)) (<= (div (+ (- 1) (* (div (+ 2 .cse3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ .cse1 (- 5)) 2)) 2))))) .cse4) (or (not .cse4) (and (or (not (= (mod (* 2 .cse1 c_ULTIMATE.start_main_~x~0) 4) 0)) (not (= (mod (div (* 2 .cse2) 4) c_ULTIMATE.start_main_~x~0) 0)) (<= (div (+ (- 1) (* (div (+ 3 .cse3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ .cse1 (- 6)) 2)) 2))) (<= 0 (+ (div (+ (- 2) .cse1) 2) 1))) .cse0))))) (and (= .cse5 1) (<= 0 c_ULTIMATE.start_main_~y~0)))) is different from false [2021-08-29 14:35:45,948 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse9 (* 2 c_ULTIMATE.start_main_~x~0))) (let ((.cse2 (* c_ULTIMATE.start_main_~x~0 (- 4))) (.cse7 (not (= 0 .cse9))) (.cse4 (* c_ULTIMATE.start_main_~x~0 2)) (.cse1 (= (mod c_ULTIMATE.start_main_~y~0 2) 0)) (.cse10 (div c_ULTIMATE.start_main_~y~0 2))) (and (let ((.cse0 (+ .cse10 1))) (or (<= 0 c_ULTIMATE.start_main_~y~0) (= .cse0 0) .cse1 (let ((.cse6 (div .cse0 2))) (let ((.cse3 (* .cse6 .cse9)) (.cse5 (* .cse6 (- 1))) (.cse8 (= (mod .cse0 2) 0))) (and (or (and (or (not (= (mod (div (+ .cse2 (* .cse3 (- 2))) (- 4)) .cse4) 0)) (<= (div (+ (- 1) (* (div (+ .cse5 2) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ (- 5) .cse6) 2)) 2)))) .cse7) .cse8) (or (and .cse7 (or (not (= (mod (div (* .cse3 2) 4) .cse4) 0)) (<= (div (+ (- 1) (* (div (+ .cse5 3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ (- 6) .cse6) 2)) 2))))) (not .cse8))))))) (let ((.cse15 (mod .cse10 2))) (or (= .cse10 0) (let ((.cse13 (div .cse10 2))) (let ((.cse12 (* .cse13 (- 1))) (.cse11 (* .cse13 .cse9)) (.cse14 (= .cse15 0))) (and (or (and .cse7 (or (not (= (mod (div (+ (* .cse11 (- 2)) .cse2) (- 4)) .cse4) 0)) (<= (div (+ (- 1) (* (div (+ .cse12 2) (- 2)) (- 1))) (- 2)) (+ (div (+ (- 1) (div (+ (- 5) .cse13) 2)) 2) 2)))) .cse14) (or (and .cse7 (or (<= (div (+ (* (div (+ .cse12 3) (- 2)) (- 1)) (- 1)) (- 2)) (+ (div (+ (- 1) (div (+ .cse13 (- 6)) 2)) 2) 2)) (not (= (mod (div (* .cse11 2) 4) .cse4) 0)) (<= 0 (+ (div (+ (- 2) .cse13) 2) 1)))) (not .cse14))))) (and (not .cse1) (< c_ULTIMATE.start_main_~y~0 0)) (and (= .cse15 1) (<= 0 .cse10))))))) is different from false [2021-08-29 14:35:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2021-08-29 14:35:49,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:35:49,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727347546] [2021-08-29 14:35:49,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:35:49,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927582679] [2021-08-29 14:35:49,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927582679] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:35:49,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:35:49,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 36 [2021-08-29 14:35:49,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641161714] [2021-08-29 14:35:49,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-29 14:35:49,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:35:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-29 14:35:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=866, Unknown=6, NotChecked=192, Total=1260 [2021-08-29 14:35:49,448 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 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 14:35:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:35:49,449 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-08-29 14:35:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 14:35:49,449 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 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 32 [2021-08-29 14:35:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:35:49,449 INFO L225 Difference]: With dead ends: 75 [2021-08-29 14:35:49,449 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 14:35:49,450 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 44210.01ms TimeCoverageRelationStatistics Valid=196, Invalid=866, Unknown=6, NotChecked=192, Total=1260 [2021-08-29 14:35:49,450 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-08-29 14:35:49,451 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-08-29 14:35:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 14:35:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 14:35:49,451 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 14:35:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 14:35:49,451 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-08-29 14:35:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:35:49,452 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 14:35:49,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 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 14:35:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 14:35:49,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 14:35:49,454 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-08-29 14:35:49,454 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-08-29 14:35:49,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 14:35:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 14:35:49,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 14:35:49,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:35:49,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:35:49,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:35:49,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:35:49,684 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-29 14:35:49,685 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 14:35:49,685 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 14:35:49,685 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 14:35:49,685 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-29 14:35:49,685 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 14:35:49,685 INFO L858 garLoopResultBuilder]: For program point L33-1(lines 33 44) no Hoare annotation was computed. [2021-08-29 14:35:49,685 INFO L854 garLoopResultBuilder]: At program point L33-3(lines 33 44) the Hoare annotation is: false [2021-08-29 14:35:49,685 INFO L858 garLoopResultBuilder]: For program point L33-4(lines 33 44) no Hoare annotation was computed. [2021-08-29 14:35:49,686 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2021-08-29 14:35:49,686 INFO L854 garLoopResultBuilder]: At program point L13-2(lines 35 36) the Hoare annotation is: false [2021-08-29 14:35:49,686 INFO L858 garLoopResultBuilder]: For program point L13-3(lines 13 16) no Hoare annotation was computed. [2021-08-29 14:35:49,686 INFO L858 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-08-29 14:35:49,686 INFO L861 garLoopResultBuilder]: At program point L13-5(lines 12 18) the Hoare annotation is: true [2021-08-29 14:35:49,686 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 41) no Hoare annotation was computed. [2021-08-29 14:35:49,686 INFO L858 garLoopResultBuilder]: For program point L38-2(lines 38 41) no Hoare annotation was computed. [2021-08-29 14:35:49,686 INFO L861 garLoopResultBuilder]: At program point L47(lines 21 48) the Hoare annotation is: true [2021-08-29 14:35:49,686 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2021-08-29 14:35:49,687 INFO L858 garLoopResultBuilder]: For program point L14-1(lines 14 15) no Hoare annotation was computed. [2021-08-29 14:35:49,687 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-08-29 14:35:49,690 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 14:35:49,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:35:49 BoogieIcfgContainer [2021-08-29 14:35:49,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 14:35:49,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 14:35:49,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 14:35:49,696 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 14:35:49,696 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:33:10" (3/4) ... [2021-08-29 14:35:49,701 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 14:35:49,708 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-29 14:35:49,708 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 14:35:49,708 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:35:49,708 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:35:49,734 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 14:35:49,734 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 14:35:49,735 INFO L158 Benchmark]: Toolchain (without parser) took 159770.75ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 29.7MB in the beginning and 53.7MB in the end (delta: -24.0MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. [2021-08-29 14:35:49,735 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:35:49,735 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.19ms. Allocated memory is still 52.4MB. Free memory was 29.4MB in the beginning and 31.3MB in the end (delta: -1.9MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-08-29 14:35:49,736 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.40ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 31.3MB in the beginning and 46.9MB in the end (delta: -15.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 14:35:49,736 INFO L158 Benchmark]: Boogie Preprocessor took 27.55ms. Allocated memory is still 62.9MB. Free memory was 46.9MB in the beginning and 45.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:35:49,736 INFO L158 Benchmark]: RCFGBuilder took 264.65ms. Allocated memory is still 62.9MB. Free memory was 45.8MB in the beginning and 37.0MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 14:35:49,737 INFO L158 Benchmark]: TraceAbstraction took 159168.13ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 36.8MB in the beginning and 18.8MB in the end (delta: 18.0MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. [2021-08-29 14:35:49,737 INFO L158 Benchmark]: Witness Printer took 38.86ms. Allocated memory is still 75.5MB. Free memory was 18.8MB in the beginning and 53.7MB in the end (delta: -34.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 14:35:49,738 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.19ms. Allocated memory is still 52.4MB. Free memory was 29.4MB in the beginning and 31.3MB in the end (delta: -1.9MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.40ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 31.3MB in the beginning and 46.9MB in the end (delta: -15.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.55ms. Allocated memory is still 62.9MB. Free memory was 46.9MB in the beginning and 45.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 264.65ms. Allocated memory is still 62.9MB. Free memory was 45.8MB in the beginning and 37.0MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 159168.13ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 36.8MB in the beginning and 18.8MB in the end (delta: 18.0MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. * Witness Printer took 38.86ms. Allocated memory is still 75.5MB. Free memory was 18.8MB in the beginning and 53.7MB in the end (delta: -34.9MB). 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, 20 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 159116.73ms, OverallIterations: 10, TraceHistogramMax: 5, EmptinessCheckTime: 13.42ms, AutomataDifference: 37538.37ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 14.76ms, InitialAbstractionConstructionTime: 6.58ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 383 SdHoareTripleChecker+Valid, 19392.35ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 383 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 19232.81ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 87 IncrementalHoareTripleChecker+Unchecked, 455 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1173 IncrementalHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 0 mSDtfsCounter, 1173 mSolverCounterSat, 9.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 71341.42ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=9, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 78.82ms AutomataMinimizationTime, 10 MinimizatonAttempts, 162 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 6 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 8.00ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.48ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 54.41ms SsaConstructionTime, 150.42ms SatisfiabilityAnalysisTime, 118765.36ms InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 240 ConstructedInterpolants, 12 QuantifiedInterpolants, 7203 SizeOfPredicates, 58 NumberOfNonLiveVariables, 796 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 29/170 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: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 14:35:49,808 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...