./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/divbin2_unwindbound1.i -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 9b373cbe6be5259af58bbd621acc4a598f97350f51d1b5f9aaeeeabd984828c1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:48:07,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:48:07,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:48:07,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:48:07,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:48:07,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:48:07,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:48:07,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:48:07,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:48:07,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:48:07,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:48:07,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:48:07,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:48:07,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:48:07,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:48:07,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:48:07,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:48:07,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:48:07,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:48:07,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:48:07,712 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:48:07,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:48:07,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:48:07,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:48:07,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:48:07,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:48:07,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:48:07,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:48:07,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:48:07,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:48:07,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:48:07,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:48:07,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:48:07,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:48:07,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:48:07,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:48:07,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:48:07,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:48:07,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:48:07,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:48:07,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:48:07,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:48:07,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:48:07,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:48:07,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:48:07,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:48:07,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:48:07,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:48:07,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:48:07,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:48:07,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:48:07,763 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:48:07,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:48:07,764 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:48:07,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:48:07,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:48:07,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:48:07,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:48:07,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:48:07,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:48:07,765 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:48:07,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:48:07,766 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:48:07,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:48:07,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:48:07,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:48:07,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:48:07,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:48:07,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:48:07,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:48:07,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:48:07,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:48:07,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:48:07,768 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:48:07,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:48:07,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:48:07,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b373cbe6be5259af58bbd621acc4a598f97350f51d1b5f9aaeeeabd984828c1 [2022-07-22 15:48:07,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:48:08,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:48:08,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:48:08,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:48:08,022 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:48:08,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound1.i [2022-07-22 15:48:08,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee093387b/55bfb0c6d00d46e2ab6e5e6018fba823/FLAG1b33ba771 [2022-07-22 15:48:08,499 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:48:08,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound1.i [2022-07-22 15:48:08,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee093387b/55bfb0c6d00d46e2ab6e5e6018fba823/FLAG1b33ba771 [2022-07-22 15:48:08,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee093387b/55bfb0c6d00d46e2ab6e5e6018fba823 [2022-07-22 15:48:08,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:48:08,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:48:08,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:48:08,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:48:08,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:48:08,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:48:08" (1/1) ... [2022-07-22 15:48:08,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c23da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:08, skipping insertion in model container [2022-07-22 15:48:08,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:48:08" (1/1) ... [2022-07-22 15:48:08,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:48:08,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:48:09,031 WARN L230 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/divbin2_unwindbound1.i[951,964] [2022-07-22 15:48:09,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:48:09,048 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:48:09,057 WARN L230 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/divbin2_unwindbound1.i[951,964] [2022-07-22 15:48:09,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:48:09,071 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:48:09,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09 WrapperNode [2022-07-22 15:48:09,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:48:09,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:48:09,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:48:09,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:48:09,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,107 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-07-22 15:48:09,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:48:09,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:48:09,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:48:09,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:48:09,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:48:09,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:48:09,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:48:09,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:48:09,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (1/1) ... [2022-07-22 15:48:09,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:48:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:09,172 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) [2022-07-22 15:48:09,173 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 [2022-07-22 15:48:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:48:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:48:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:48:09,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:48:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 15:48:09,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 15:48:09,252 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:48:09,254 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:48:09,417 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:48:09,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:48:09,423 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 15:48:09,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:48:09 BoogieIcfgContainer [2022-07-22 15:48:09,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:48:09,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:48:09,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:48:09,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:48:09,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:48:08" (1/3) ... [2022-07-22 15:48:09,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b6769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:48:09, skipping insertion in model container [2022-07-22 15:48:09,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:48:09" (2/3) ... [2022-07-22 15:48:09,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b6769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:48:09, skipping insertion in model container [2022-07-22 15:48:09,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:48:09" (3/3) ... [2022-07-22 15:48:09,437 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound1.i [2022-07-22 15:48:09,448 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:48:09,449 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:48:09,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:48:09,509 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13349250, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7746119e [2022-07-22 15:48:09,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:48:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:48:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 15:48:09,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:09,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:09,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:09,539 INFO L85 PathProgramCache]: Analyzing trace with hash 553144752, now seen corresponding path program 1 times [2022-07-22 15:48:09,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103699629] [2022-07-22 15:48:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:09,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:09,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103699629] [2022-07-22 15:48:09,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103699629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:48:09,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:48:09,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:48:09,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494327516] [2022-07-22 15:48:09,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:09,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:48:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:48:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:48:09,749 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:09,764 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2022-07-22 15:48:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:48:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 15:48:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:09,772 INFO L225 Difference]: With dead ends: 37 [2022-07-22 15:48:09,772 INFO L226 Difference]: Without dead ends: 17 [2022-07-22 15:48:09,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:48:09,778 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:09,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:48:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-22 15:48:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-22 15:48:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 15:48:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-07-22 15:48:09,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2022-07-22 15:48:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:09,813 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-07-22 15:48:09,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-07-22 15:48:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 15:48:09,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:09,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:09,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:48:09,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:09,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:09,818 INFO L85 PathProgramCache]: Analyzing trace with hash -803059042, now seen corresponding path program 1 times [2022-07-22 15:48:09,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:09,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854387521] [2022-07-22 15:48:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:09,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:09,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:09,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854387521] [2022-07-22 15:48:09,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854387521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:48:09,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:48:09,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:48:09,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648210987] [2022-07-22 15:48:09,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:09,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:48:09,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:09,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:48:09,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:48:09,914 INFO L87 Difference]: Start difference. First operand 17 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:09,945 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-07-22 15:48:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:48:09,946 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 15:48:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:09,946 INFO L225 Difference]: With dead ends: 31 [2022-07-22 15:48:09,947 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 15:48:09,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:48:09,948 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:09,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:48:09,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 15:48:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-22 15:48:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 15:48:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-07-22 15:48:09,968 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-07-22 15:48:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:09,968 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-07-22 15:48:09,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-07-22 15:48:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 15:48:09,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:09,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:09,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:48:09,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash 549278495, now seen corresponding path program 1 times [2022-07-22 15:48:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:09,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050470712] [2022-07-22 15:48:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:09,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:09,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:48:09,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298661326] [2022-07-22 15:48:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:10,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:10,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:10,005 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) [2022-07-22 15:48:10,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:48:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:10,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 15:48:10,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:10,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:48:10,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050470712] [2022-07-22 15:48:10,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:48:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298661326] [2022-07-22 15:48:10,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298661326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:48:10,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:48:10,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 15:48:10,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691186846] [2022-07-22 15:48:10,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:10,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:48:10,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:48:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:48:10,284 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:10,369 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-07-22 15:48:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:48:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 15:48:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:10,372 INFO L225 Difference]: With dead ends: 31 [2022-07-22 15:48:10,372 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 15:48:10,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:48:10,377 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:10,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:48:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 15:48:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-22 15:48:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:48:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-22 15:48:10,394 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2022-07-22 15:48:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:10,394 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-22 15:48:10,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-22 15:48:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:48:10,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:10,397 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:10,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:48:10,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:10,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1647533572, now seen corresponding path program 1 times [2022-07-22 15:48:10,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912249743] [2022-07-22 15:48:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:10,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:10,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:48:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002122107] [2022-07-22 15:48:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:10,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:10,631 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) [2022-07-22 15:48:10,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:48:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:10,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 15:48:10,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:10,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:48:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:10,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912249743] [2022-07-22 15:48:10,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:48:10,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002122107] [2022-07-22 15:48:10,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002122107] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:48:10,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:48:10,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-07-22 15:48:10,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570368608] [2022-07-22 15:48:10,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:10,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:48:10,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:10,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:48:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:48:10,944 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:10,965 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-22 15:48:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:48:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 15:48:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:10,967 INFO L225 Difference]: With dead ends: 39 [2022-07-22 15:48:10,967 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 15:48:10,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:48:10,969 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:10,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-07-22 15:48:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 15:48:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-07-22 15:48:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 15:48:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-07-22 15:48:10,976 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2022-07-22 15:48:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:10,977 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-07-22 15:48:10,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-07-22 15:48:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:48:10,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:10,978 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:11,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 15:48:11,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 15:48:11,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:11,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1649321032, now seen corresponding path program 1 times [2022-07-22 15:48:11,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:11,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723029869] [2022-07-22 15:48:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:11,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:11,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:48:11,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575887347] [2022-07-22 15:48:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:11,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:11,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:11,205 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) [2022-07-22 15:48:11,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:48:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:11,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 15:48:11,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:48:11,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:48:11,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:11,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723029869] [2022-07-22 15:48:11,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:48:11,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575887347] [2022-07-22 15:48:11,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575887347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:48:11,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:48:11,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:48:11,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604565264] [2022-07-22 15:48:11,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:11,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:48:11,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:11,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:48:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:48:11,257 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:11,278 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-07-22 15:48:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:48:11,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 15:48:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:11,280 INFO L225 Difference]: With dead ends: 44 [2022-07-22 15:48:11,280 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 15:48:11,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:48:11,281 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:11,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:48:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 15:48:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-22 15:48:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:48:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-22 15:48:11,286 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 13 [2022-07-22 15:48:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:11,287 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-22 15:48:11,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-22 15:48:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 15:48:11,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:11,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:11,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:48:11,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:11,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:11,506 INFO L85 PathProgramCache]: Analyzing trace with hash -791761799, now seen corresponding path program 1 times [2022-07-22 15:48:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:11,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103480425] [2022-07-22 15:48:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:11,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:11,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:48:11,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107596184] [2022-07-22 15:48:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:11,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:11,532 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) [2022-07-22 15:48:11,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:48:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:11,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:48:11,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:11,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:48:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:11,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:11,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103480425] [2022-07-22 15:48:11,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:48:11,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107596184] [2022-07-22 15:48:11,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107596184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:48:11,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:48:11,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-22 15:48:11,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228236344] [2022-07-22 15:48:11,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:48:11,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:48:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:48:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:48:11,601 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:11,626 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-07-22 15:48:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:48:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-22 15:48:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:11,628 INFO L225 Difference]: With dead ends: 42 [2022-07-22 15:48:11,628 INFO L226 Difference]: Without dead ends: 25 [2022-07-22 15:48:11,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:48:11,629 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:11,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:48:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-22 15:48:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-22 15:48:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:48:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-22 15:48:11,633 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-07-22 15:48:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:11,633 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-22 15:48:11,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-22 15:48:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 15:48:11,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:11,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:11,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:48:11,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:11,843 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2116548854, now seen corresponding path program 1 times [2022-07-22 15:48:11,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:11,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671002122] [2022-07-22 15:48:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:11,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:48:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219639282] [2022-07-22 15:48:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:11,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:11,855 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) [2022-07-22 15:48:11,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:48:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:11,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:48:11,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:48:11,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:48:11,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671002122] [2022-07-22 15:48:11,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:48:11,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219639282] [2022-07-22 15:48:11,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219639282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:48:11,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:48:11,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 15:48:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385059222] [2022-07-22 15:48:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:11,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:48:11,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:48:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:48:11,917 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 15:48:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:11,933 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-22 15:48:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:48:11,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-22 15:48:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:11,934 INFO L225 Difference]: With dead ends: 25 [2022-07-22 15:48:11,934 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 15:48:11,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:48:11,935 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:11,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:48:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 15:48:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 15:48:11,936 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) [2022-07-22 15:48:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 15:48:11,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-07-22 15:48:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:11,936 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 15:48:11,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 15:48:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 15:48:11,936 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 15:48:11,938 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 15:48:11,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:48:12,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:12,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-22 15:48:12,251 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-22 15:48:12,251 INFO L899 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2022-07-22 15:48:12,251 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2022-07-22 15:48:12,251 INFO L895 garLoopResultBuilder]: At program point L38-2(lines 38 47) the Hoare annotation is: (forall ((|ULTIMATE.start_main_~b~0#1| Int)) (= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296))) [2022-07-22 15:48:12,252 INFO L899 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2022-07-22 15:48:12,252 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-22 15:48:12,252 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (or (and (forall ((|ULTIMATE.start_main_~b~0#1| Int)) (= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296))) (<= 1 ~counter~0)) (and (= |ULTIMATE.start_main_~b~0#1| 1) (= |ULTIMATE.start_main_~q~0#1| 0) (= ~counter~0 0) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|))) [2022-07-22 15:48:12,252 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-22 15:48:12,252 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-22 15:48:12,252 INFO L902 garLoopResultBuilder]: At program point L49(lines 26 50) the Hoare annotation is: true [2022-07-22 15:48:12,252 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 46) no Hoare annotation was computed. [2022-07-22 15:48:12,252 INFO L899 garLoopResultBuilder]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2022-07-22 15:48:12,253 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: false [2022-07-22 15:48:12,253 INFO L899 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2022-07-22 15:48:12,253 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-07-22 15:48:12,253 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2022-07-22 15:48:12,253 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-07-22 15:48:12,253 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2022-07-22 15:48:12,253 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2022-07-22 15:48:12,253 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2022-07-22 15:48:12,253 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2022-07-22 15:48:12,259 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:12,261 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 15:48:12,268 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-07-22 15:48:12,272 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-07-22 15:48:12,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 03:48:12 BoogieIcfgContainer [2022-07-22 15:48:12,273 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 15:48:12,274 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 15:48:12,274 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 15:48:12,274 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 15:48:12,274 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:48:09" (3/4) ... [2022-07-22 15:48:12,277 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-22 15:48:12,282 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-22 15:48:12,284 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-22 15:48:12,284 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-22 15:48:12,285 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-22 15:48:12,285 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-22 15:48:12,323 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 15:48:12,323 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 15:48:12,324 INFO L158 Benchmark]: Toolchain (without parser) took 3422.35ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 59.6MB in the beginning and 92.4MB in the end (delta: -32.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:48:12,324 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory was 76.1MB in the beginning and 76.0MB in the end (delta: 72.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:48:12,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.12ms. Allocated memory is still 96.5MB. Free memory was 59.4MB in the beginning and 49.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 15:48:12,325 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.09ms. Allocated memory is still 96.5MB. Free memory was 49.3MB in the beginning and 47.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 15:48:12,325 INFO L158 Benchmark]: Boogie Preprocessor took 37.60ms. Allocated memory is still 96.5MB. Free memory was 47.8MB in the beginning and 46.8MB in the end (delta: 969.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:48:12,326 INFO L158 Benchmark]: RCFGBuilder took 278.92ms. Allocated memory is still 96.5MB. Free memory was 46.7MB in the beginning and 73.8MB in the end (delta: -27.1MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2022-07-22 15:48:12,326 INFO L158 Benchmark]: TraceAbstraction took 2846.22ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 73.4MB in the beginning and 94.5MB in the end (delta: -21.1MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. [2022-07-22 15:48:12,326 INFO L158 Benchmark]: Witness Printer took 49.53ms. Allocated memory is still 117.4MB. Free memory was 94.5MB in the beginning and 92.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 15:48:12,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory was 76.1MB in the beginning and 76.0MB in the end (delta: 72.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 167.12ms. Allocated memory is still 96.5MB. Free memory was 59.4MB in the beginning and 49.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.09ms. Allocated memory is still 96.5MB. Free memory was 49.3MB in the beginning and 47.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.60ms. Allocated memory is still 96.5MB. Free memory was 47.8MB in the beginning and 46.8MB in the end (delta: 969.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 278.92ms. Allocated memory is still 96.5MB. Free memory was 46.7MB in the beginning and 73.8MB in the end (delta: -27.1MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2846.22ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 73.4MB in the beginning and 94.5MB in the end (delta: -21.1MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. * Witness Printer took 49.53ms. Allocated memory is still 117.4MB. Free memory was 94.5MB in the beginning and 92.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: 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 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 348 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 28 IncrementalHoareTripleChecker+Unchecked, 216 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 85 IncrementalHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 132 mSDtfsCounter, 85 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 18 PreInvPairs, 23 NumberOfFragments, 45 HoareAnnotationTreeSize, 18 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 107 ConstructedInterpolants, 8 QuantifiedInterpolants, 444 SizeOfPredicates, 7 NumberOfNonLiveVariables, 301 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 12/16 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 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant [2022-07-22 15:48:12,335 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-07-22 15:48:12,335 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] Derived loop invariant: ((forall ULTIMATE.start_main_~b~0#1 : int :: A % 4294967296 == (r + ULTIMATE.start_main_~b~0#1 * q) % 4294967296) && 1 <= counter) || (((b == 1 && q == 0) && counter == 0) && A == r) RESULT: Ultimate proved your program to be correct! [2022-07-22 15:48:12,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE