./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/array-examples/standard_copy9_ground-2.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 aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 21:03:23,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 21:03:23,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 21:03:23,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 21:03:23,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 21:03:23,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 21:03:23,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 21:03:23,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 21:03:23,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 21:03:23,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 21:03:23,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 21:03:23,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 21:03:23,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 21:03:23,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 21:03:23,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 21:03:23,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 21:03:23,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 21:03:23,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 21:03:23,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 21:03:23,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 21:03:23,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 21:03:23,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 21:03:23,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 21:03:23,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 21:03:23,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 21:03:23,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 21:03:23,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 21:03:23,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 21:03:23,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 21:03:23,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 21:03:23,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 21:03:23,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 21:03:23,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 21:03:23,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 21:03:23,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 21:03:23,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 21:03:23,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 21:03:23,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 21:03:23,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 21:03:23,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 21:03:23,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 21:03:23,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 21:03:23,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 21:03:23,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 21:03:23,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 21:03:23,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 21:03:23,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 21:03:23,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 21:03:23,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 21:03:23,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 21:03:23,830 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 21:03:23,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 21:03:23,831 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 21:03:23,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 21:03:23,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 21:03:23,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 21:03:23,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 21:03:23,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 21:03:23,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 21:03:23,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 21:03:23,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 21:03:23,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 21:03:23,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 21:03:23,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 21:03:23,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 21:03:23,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 21:03:23,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:03:23,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 21:03:23,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 21:03:23,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 21:03:23,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 21:03:23,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 21:03:23,834 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 21:03:23,834 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 21:03:23,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 21:03:23,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 21:03:23,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aab03c22d13215fab0d6755eff6eea090232335ae63c67c9d83313131cbb4c89 [2021-12-16 21:03:24,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 21:03:24,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 21:03:24,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 21:03:24,086 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 21:03:24,086 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 21:03:24,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2021-12-16 21:03:24,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ae17d62/62c752f88c494267b8b08146f7c78c76/FLAG9d6b88b28 [2021-12-16 21:03:24,585 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 21:03:24,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy9_ground-2.i [2021-12-16 21:03:24,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ae17d62/62c752f88c494267b8b08146f7c78c76/FLAG9d6b88b28 [2021-12-16 21:03:24,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ae17d62/62c752f88c494267b8b08146f7c78c76 [2021-12-16 21:03:24,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 21:03:24,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 21:03:24,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 21:03:24,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 21:03:24,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 21:03:24,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26698cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24, skipping insertion in model container [2021-12-16 21:03:24,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 21:03:24,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 21:03:24,746 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/array-examples/standard_copy9_ground-2.i[816,829] [2021-12-16 21:03:24,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:03:24,764 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 21:03:24,772 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/array-examples/standard_copy9_ground-2.i[816,829] [2021-12-16 21:03:24,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:03:24,791 INFO L208 MainTranslator]: Completed translation [2021-12-16 21:03:24,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24 WrapperNode [2021-12-16 21:03:24,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 21:03:24,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 21:03:24,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 21:03:24,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 21:03:24,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,819 INFO L137 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 192 [2021-12-16 21:03:24,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 21:03:24,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 21:03:24,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 21:03:24,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 21:03:24,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 21:03:24,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 21:03:24,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 21:03:24,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 21:03:24,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (1/1) ... [2021-12-16 21:03:24,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:03:24,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:03:24,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 21:03:24,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 21:03:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 21:03:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 21:03:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 21:03:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 21:03:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 21:03:24,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 21:03:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 21:03:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 21:03:25,008 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 21:03:25,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 21:03:25,177 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 21:03:25,181 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 21:03:25,182 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-16 21:03:25,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:03:25 BoogieIcfgContainer [2021-12-16 21:03:25,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 21:03:25,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 21:03:25,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 21:03:25,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 21:03:25,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 09:03:24" (1/3) ... [2021-12-16 21:03:25,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173cb76e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:03:25, skipping insertion in model container [2021-12-16 21:03:25,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:03:24" (2/3) ... [2021-12-16 21:03:25,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173cb76e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:03:25, skipping insertion in model container [2021-12-16 21:03:25,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:03:25" (3/3) ... [2021-12-16 21:03:25,189 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2021-12-16 21:03:25,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 21:03:25,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 21:03:25,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 21:03:25,244 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 21:03:25,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 21:03:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.6) internal successors, (64), 41 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 21:03:25,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:03:25,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:03:25,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:03:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:03:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1887916137, now seen corresponding path program 1 times [2021-12-16 21:03:25,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:03:25,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583075385] [2021-12-16 21:03:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:25,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:03:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 21:03:25,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:03:25,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583075385] [2021-12-16 21:03:25,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583075385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 21:03:25,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 21:03:25,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 21:03:25,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386172608] [2021-12-16 21:03:25,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 21:03:25,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 21:03:25,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:03:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 21:03:25,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 21:03:25,587 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.6) internal successors, (64), 41 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:03:25,607 INFO L93 Difference]: Finished difference Result 82 states and 126 transitions. [2021-12-16 21:03:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 21:03:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 21:03:25,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:03:25,615 INFO L225 Difference]: With dead ends: 82 [2021-12-16 21:03:25,615 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 21:03:25,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 21:03:25,619 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:03:25,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:03:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 21:03:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-16 21:03:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-12-16 21:03:25,662 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 25 [2021-12-16 21:03:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:03:25,662 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-12-16 21:03:25,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-12-16 21:03:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 21:03:25,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:03:25,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:03:25,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 21:03:25,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:03:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:03:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash -166940861, now seen corresponding path program 1 times [2021-12-16 21:03:25,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:03:25,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78792149] [2021-12-16 21:03:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:25,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:03:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 21:03:25,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:03:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78792149] [2021-12-16 21:03:25,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78792149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:03:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576331981] [2021-12-16 21:03:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:25,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:25,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:03:25,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:03:25,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 21:03:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:25,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 21:03:25,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:03:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 21:03:26,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 21:03:26,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576331981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 21:03:26,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 21:03:26,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 21:03:26,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786055680] [2021-12-16 21:03:26,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 21:03:26,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 21:03:26,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:03:26,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 21:03:26,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 21:03:26,062 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:03:26,152 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2021-12-16 21:03:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 21:03:26,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 21:03:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:03:26,157 INFO L225 Difference]: With dead ends: 88 [2021-12-16 21:03:26,159 INFO L226 Difference]: Without dead ends: 57 [2021-12-16 21:03:26,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 21:03:26,162 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:03:26,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 41 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:03:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-16 21:03:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-12-16 21:03:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-16 21:03:26,178 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 27 [2021-12-16 21:03:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:03:26,182 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-16 21:03:26,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-16 21:03:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 21:03:26,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:03:26,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:03:26,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 21:03:26,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:26,416 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:03:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:03:26,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1109508687, now seen corresponding path program 1 times [2021-12-16 21:03:26,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:03:26,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907797624] [2021-12-16 21:03:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:26,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:03:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 21:03:26,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:03:26,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907797624] [2021-12-16 21:03:26,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907797624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:03:26,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695196680] [2021-12-16 21:03:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:26,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:03:26,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:03:26,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 21:03:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 21:03:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:03:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 21:03:26,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:03:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 21:03:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695196680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:03:26,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:03:26,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 21:03:26,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750557225] [2021-12-16 21:03:26,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:03:26,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 21:03:26,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:03:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 21:03:26,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:03:26,818 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:03:26,850 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2021-12-16 21:03:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 21:03:26,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-16 21:03:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:03:26,851 INFO L225 Difference]: With dead ends: 97 [2021-12-16 21:03:26,851 INFO L226 Difference]: Without dead ends: 54 [2021-12-16 21:03:26,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:03:26,852 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:03:26,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 134 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:03:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-16 21:03:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-16 21:03:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-12-16 21:03:26,857 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 45 [2021-12-16 21:03:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:03:26,857 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-12-16 21:03:26,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-12-16 21:03:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 21:03:26,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:03:26,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:03:26,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 21:03:27,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 21:03:27,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:03:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:03:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1235875349, now seen corresponding path program 2 times [2021-12-16 21:03:27,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:03:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394325032] [2021-12-16 21:03:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:27,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:03:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 21:03:27,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:03:27,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394325032] [2021-12-16 21:03:27,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394325032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:03:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736504909] [2021-12-16 21:03:27,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 21:03:27,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:27,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:03:27,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:03:27,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 21:03:27,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 21:03:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:03:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 21:03:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:03:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 21:03:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:03:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 21:03:27,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736504909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:03:27,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:03:27,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-16 21:03:27,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766297844] [2021-12-16 21:03:27,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:03:27,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 21:03:27,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:03:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 21:03:27,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 21:03:27,590 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:03:27,712 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2021-12-16 21:03:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 21:03:27,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-16 21:03:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:03:27,716 INFO L225 Difference]: With dead ends: 136 [2021-12-16 21:03:27,716 INFO L226 Difference]: Without dead ends: 93 [2021-12-16 21:03:27,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 21:03:27,720 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:03:27,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 89 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:03:27,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-16 21:03:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-12-16 21:03:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-12-16 21:03:27,741 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 51 [2021-12-16 21:03:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:03:27,745 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-12-16 21:03:27,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-12-16 21:03:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 21:03:27,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:03:27,753 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:03:27,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 21:03:27,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:27,954 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:03:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:03:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2120427341, now seen corresponding path program 3 times [2021-12-16 21:03:27,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:03:27,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805418943] [2021-12-16 21:03:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:27,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:03:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 21:03:28,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:03:28,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805418943] [2021-12-16 21:03:28,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805418943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:03:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344787210] [2021-12-16 21:03:28,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 21:03:28,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:03:28,090 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:03:28,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 21:03:28,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 21:03:28,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:03:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 21:03:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:03:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-16 21:03:28,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:03:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-16 21:03:28,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344787210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:03:28,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:03:28,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-12-16 21:03:28,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600420421] [2021-12-16 21:03:28,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:03:28,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 21:03:28,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:03:28,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 21:03:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-16 21:03:28,494 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:03:28,725 INFO L93 Difference]: Finished difference Result 220 states and 276 transitions. [2021-12-16 21:03:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 21:03:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 21:03:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:03:28,727 INFO L225 Difference]: With dead ends: 220 [2021-12-16 21:03:28,727 INFO L226 Difference]: Without dead ends: 159 [2021-12-16 21:03:28,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-16 21:03:28,728 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 21:03:28,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 141 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 21:03:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-16 21:03:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-12-16 21:03:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2021-12-16 21:03:28,735 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 81 [2021-12-16 21:03:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:03:28,736 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2021-12-16 21:03:28,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2021-12-16 21:03:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-16 21:03:28,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:03:28,754 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:03:28,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 21:03:28,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:28,972 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:03:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:03:28,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1529021629, now seen corresponding path program 4 times [2021-12-16 21:03:28,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:03:28,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466296646] [2021-12-16 21:03:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:28,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:03:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-16 21:03:29,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:03:29,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466296646] [2021-12-16 21:03:29,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466296646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:03:29,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134121765] [2021-12-16 21:03:29,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 21:03:29,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:29,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:03:29,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:03:29,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 21:03:29,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 21:03:29,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:03:29,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 21:03:29,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:03:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-12-16 21:03:29,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:03:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-12-16 21:03:29,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134121765] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:03:29,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:03:29,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2021-12-16 21:03:29,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819601228] [2021-12-16 21:03:29,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:03:29,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 21:03:29,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:03:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 21:03:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-12-16 21:03:29,822 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand has 28 states, 28 states have (on average 4.464285714285714) internal successors, (125), 28 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:03:30,161 INFO L93 Difference]: Finished difference Result 438 states and 530 transitions. [2021-12-16 21:03:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 21:03:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.464285714285714) internal successors, (125), 28 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-12-16 21:03:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:03:30,163 INFO L225 Difference]: With dead ends: 438 [2021-12-16 21:03:30,163 INFO L226 Difference]: Without dead ends: 305 [2021-12-16 21:03:30,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-12-16 21:03:30,164 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 281 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 21:03:30,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 142 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 21:03:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-16 21:03:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2021-12-16 21:03:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.0363036303630364) internal successors, (314), 303 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 314 transitions. [2021-12-16 21:03:30,183 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 314 transitions. Word has length 155 [2021-12-16 21:03:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:03:30,184 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 314 transitions. [2021-12-16 21:03:30,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.464285714285714) internal successors, (125), 28 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:03:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 314 transitions. [2021-12-16 21:03:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-16 21:03:30,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:03:30,191 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:03:30,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 21:03:30,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:30,409 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:03:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:03:30,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1642142321, now seen corresponding path program 5 times [2021-12-16 21:03:30,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:03:30,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117545852] [2021-12-16 21:03:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:03:30,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:03:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:03:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1908 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2021-12-16 21:03:30,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:03:30,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117545852] [2021-12-16 21:03:30,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117545852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:03:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306541165] [2021-12-16 21:03:30,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 21:03:30,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:03:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:03:30,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:03:30,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process Killed by 15