./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/verifythis/elimination_max.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:59:31,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:59:31,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:59:31,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:59:31,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:59:31,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:59:31,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:59:31,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:59:31,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:59:31,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:59:31,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:59:31,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:59:31,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:59:31,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:59:31,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:59:31,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:59:31,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:59:31,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:59:31,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:59:31,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:59:31,838 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:59:31,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:59:31,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:59:31,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:59:31,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:59:31,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:59:31,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:59:31,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:59:31,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:59:31,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:59:31,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:59:31,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:59:31,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:59:31,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:59:31,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:59:31,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:59:31,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:59:31,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:59:31,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:59:31,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:59:31,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:59:31,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:59:31,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:59:31,886 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:59:31,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:59:31,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:59:31,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:59:31,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:59:31,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:59:31,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:59:31,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:59:31,888 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:59:31,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:59:31,889 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:59:31,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:59:31,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:59:31,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:59:31,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:59:31,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:59:31,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:59:31,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:59:31,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:59:31,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:59:31,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:59:31,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:59:31,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:59:31,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:59:31,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:59:31,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:59:31,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:59:31,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:59:31,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:59:31,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:59:31,891 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:59:31,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:59:31,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:59:31,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e [2022-07-21 02:59:32,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:59:32,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:59:32,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:59:32,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:59:32,174 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:59:32,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max.c [2022-07-21 02:59:32,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a882635c/0e48d7ebba6b4414a43aca6f8a628c09/FLAG13e092574 [2022-07-21 02:59:32,561 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:59:32,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c [2022-07-21 02:59:32,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a882635c/0e48d7ebba6b4414a43aca6f8a628c09/FLAG13e092574 [2022-07-21 02:59:32,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a882635c/0e48d7ebba6b4414a43aca6f8a628c09 [2022-07-21 02:59:32,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:59:32,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:59:32,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:59:32,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:59:32,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:59:32,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:59:32" (1/1) ... [2022-07-21 02:59:32,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19124452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:32, skipping insertion in model container [2022-07-21 02:59:32,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:59:32" (1/1) ... [2022-07-21 02:59:32,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:59:32,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:59:33,081 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/verifythis/elimination_max.c[485,498] [2022-07-21 02:59:33,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:59:33,101 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:59:33,111 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/verifythis/elimination_max.c[485,498] [2022-07-21 02:59:33,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:59:33,151 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:59:33,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33 WrapperNode [2022-07-21 02:59:33,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:59:33,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:59:33,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:59:33,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:59:33,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,177 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2022-07-21 02:59:33,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:59:33,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:59:33,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:59:33,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:59:33,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:59:33,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:59:33,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:59:33,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:59:33,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (1/1) ... [2022-07-21 02:59:33,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:59:33,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:59:33,212 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) [2022-07-21 02:59:33,213 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 [2022-07-21 02:59:33,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:59:33,235 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 02:59:33,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 02:59:33,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:59:33,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 02:59:33,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:59:33,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:59:33,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 02:59:33,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 02:59:33,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 02:59:33,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 02:59:33,287 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:59:33,288 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:59:33,455 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:59:33,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:59:33,468 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 02:59:33,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:59:33 BoogieIcfgContainer [2022-07-21 02:59:33,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:59:33,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:59:33,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:59:33,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:59:33,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:59:32" (1/3) ... [2022-07-21 02:59:33,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61639649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:59:33, skipping insertion in model container [2022-07-21 02:59:33,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:33" (2/3) ... [2022-07-21 02:59:33,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61639649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:59:33, skipping insertion in model container [2022-07-21 02:59:33,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:59:33" (3/3) ... [2022-07-21 02:59:33,489 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2022-07-21 02:59:33,498 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:59:33,499 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:59:33,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:59:33,575 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@2e5a0111, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c4604ed [2022-07-21 02:59:33,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:59:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 02:59:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:59:33,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:33,598 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:59:33,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 434333419, now seen corresponding path program 1 times [2022-07-21 02:59:33,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:59:33,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166680790] [2022-07-21 02:59:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:33,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:59:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:33,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 02:59:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:33,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 02:59:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:59:33,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:59:33,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166680790] [2022-07-21 02:59:33,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166680790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:59:33,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:59:33,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:59:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646711620] [2022-07-21 02:59:33,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:59:33,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:59:33,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:59:33,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:59:33,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:59:33,740 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:59:33,757 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-07-21 02:59:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:59:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-21 02:59:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:59:33,765 INFO L225 Difference]: With dead ends: 57 [2022-07-21 02:59:33,765 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 02:59:33,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:59:33,773 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-07-21 02:59:33,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:59:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 02:59:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-21 02:59:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 02:59:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-21 02:59:33,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2022-07-21 02:59:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:59:33,809 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-21 02:59:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-21 02:59:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:59:33,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:33,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:59:33,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:59:33,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1040778997, now seen corresponding path program 1 times [2022-07-21 02:59:33,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:59:33,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111526630] [2022-07-21 02:59:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:33,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:59:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:34,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 02:59:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:34,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 02:59:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:59:34,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:59:34,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111526630] [2022-07-21 02:59:34,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111526630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:59:34,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:59:34,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 02:59:34,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975828584] [2022-07-21 02:59:34,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:59:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:59:34,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:59:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:59:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:59:34,028 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:59:34,120 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-07-21 02:59:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:59:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-21 02:59:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:59:34,121 INFO L225 Difference]: With dead ends: 32 [2022-07-21 02:59:34,122 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 02:59:34,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:59:34,126 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:59:34,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 101 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:59:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 02:59:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-21 02:59:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 02:59:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-21 02:59:34,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-07-21 02:59:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:59:34,142 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-21 02:59:34,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-21 02:59:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 02:59:34,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:34,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:59:34,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:59:34,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1270583733, now seen corresponding path program 1 times [2022-07-21 02:59:34,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:59:34,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652504455] [2022-07-21 02:59:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:59:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:34,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 02:59:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:34,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 02:59:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:34,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 02:59:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:59:34,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:59:34,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652504455] [2022-07-21 02:59:34,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652504455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:59:34,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:59:34,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 02:59:34,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479470528] [2022-07-21 02:59:34,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:59:34,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 02:59:34,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:59:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 02:59:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:59:34,302 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 02:59:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:59:34,392 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-07-21 02:59:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 02:59:34,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-07-21 02:59:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:59:34,393 INFO L225 Difference]: With dead ends: 30 [2022-07-21 02:59:34,393 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 02:59:34,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:59:34,394 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:59:34,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 113 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:59:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 02:59:34,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 02:59:34,395 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) [2022-07-21 02:59:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 02:59:34,396 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-07-21 02:59:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:59:34,396 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 02:59:34,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 02:59:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 02:59:34,396 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 02:59:34,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 02:59:34,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 02:59:34,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 02:59:34,431 INFO L895 garLoopResultBuilder]: At program point L35-2(lines 25 37) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2022-07-21 02:59:34,431 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-21 02:59:34,431 INFO L899 garLoopResultBuilder]: For program point L25-2(lines 25 37) no Hoare annotation was computed. [2022-07-21 02:59:34,431 INFO L902 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: true [2022-07-21 02:59:34,431 INFO L899 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2022-07-21 02:59:34,432 INFO L902 garLoopResultBuilder]: At program point L50(lines 16 51) the Hoare annotation is: true [2022-07-21 02:59:34,432 INFO L895 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (<= 0 |ULTIMATE.start_main_#t~mem16#1|) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)) (= |ULTIMATE.start_main_#t~mem15#1| 0))) [2022-07-21 02:59:34,432 INFO L899 garLoopResultBuilder]: For program point L46-1(line 46) no Hoare annotation was computed. [2022-07-21 02:59:34,432 INFO L895 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2022-07-21 02:59:34,432 INFO L899 garLoopResultBuilder]: For program point L42-1(line 42) no Hoare annotation was computed. [2022-07-21 02:59:34,432 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-21 02:59:34,432 INFO L899 garLoopResultBuilder]: For program point L-1-1(line -1) no Hoare annotation was computed. [2022-07-21 02:59:34,433 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-21 02:59:34,433 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-21 02:59:34,433 INFO L895 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0)) (.cse1 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (and (= .cse0 .cse1) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)) (= |ULTIMATE.start_main_#t~mem12#1| 0) (= (select .cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|))) [2022-07-21 02:59:34,433 INFO L899 garLoopResultBuilder]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2022-07-21 02:59:34,433 INFO L899 garLoopResultBuilder]: For program point L43-1(line 43) no Hoare annotation was computed. [2022-07-21 02:59:34,433 INFO L895 garLoopResultBuilder]: At program point L45-3(lines 45 47) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2022-07-21 02:59:34,434 INFO L899 garLoopResultBuilder]: For program point L45-4(lines 45 47) no Hoare annotation was computed. [2022-07-21 02:59:34,434 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 36) no Hoare annotation was computed. [2022-07-21 02:59:34,434 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-07-21 02:59:34,434 INFO L899 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-07-21 02:59:34,434 INFO L899 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-07-21 02:59:34,434 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-07-21 02:59:34,434 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 12) the Hoare annotation is: true [2022-07-21 02:59:34,434 INFO L899 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-07-21 02:59:34,435 INFO L899 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2022-07-21 02:59:34,435 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 12) no Hoare annotation was computed. [2022-07-21 02:59:34,435 INFO L899 garLoopResultBuilder]: For program point L11-3(lines 10 12) no Hoare annotation was computed. [2022-07-21 02:59:34,435 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2022-07-21 02:59:34,437 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 02:59:34,438 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 02:59:34,442 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:263) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:136) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:136) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:136) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:449) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-21 02:59:34,445 INFO L158 Benchmark]: Toolchain (without parser) took 1473.95ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 39.6MB in the beginning and 31.2MB in the end (delta: 8.4MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2022-07-21 02:59:34,445 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 44.0MB. Free memory was 26.2MB in the beginning and 26.2MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:59:34,445 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.21ms. Allocated memory is still 56.6MB. Free memory was 39.4MB in the beginning and 40.3MB in the end (delta: -852.7kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-21 02:59:34,446 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.17ms. Allocated memory is still 56.6MB. Free memory was 40.3MB in the beginning and 38.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:59:34,446 INFO L158 Benchmark]: Boogie Preprocessor took 13.89ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 37.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:59:34,446 INFO L158 Benchmark]: RCFGBuilder took 278.34ms. Allocated memory is still 56.6MB. Free memory was 37.2MB in the beginning and 26.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 02:59:34,446 INFO L158 Benchmark]: TraceAbstraction took 972.77ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 26.2MB in the beginning and 31.2MB in the end (delta: -5.0MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2022-07-21 02:59:34,447 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 44.0MB. Free memory was 26.2MB in the beginning and 26.2MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.21ms. Allocated memory is still 56.6MB. Free memory was 39.4MB in the beginning and 40.3MB in the end (delta: -852.7kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.17ms. Allocated memory is still 56.6MB. Free memory was 40.3MB in the beginning and 38.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.89ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 37.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 278.34ms. Allocated memory is still 56.6MB. Free memory was 37.2MB in the beginning and 26.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 972.77ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 26.2MB in the beginning and 31.2MB in the end (delta: -5.0MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * 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: 11]: 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 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 248 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 167 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 107 IncrementalHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 81 mSDtfsCounter, 107 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 20 NumberOfFragments, 89 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 219 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 14/14 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 - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:263) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-21 02:59:34,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/verifythis/elimination_max.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:59:36,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:59:36,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:59:36,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:59:36,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:59:36,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:59:36,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:59:36,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:59:36,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:59:36,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:59:36,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:59:36,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:59:36,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:59:36,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:59:36,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:59:36,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:59:36,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:59:36,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:59:36,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:59:36,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:59:36,194 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:59:36,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:59:36,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:59:36,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:59:36,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:59:36,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:59:36,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:59:36,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:59:36,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:59:36,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:59:36,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:59:36,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:59:36,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:59:36,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:59:36,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:59:36,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:59:36,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:59:36,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:59:36,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:59:36,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:59:36,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:59:36,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:59:36,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 02:59:36,245 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:59:36,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:59:36,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:59:36,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:59:36,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:59:36,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:59:36,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:59:36,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:59:36,247 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:59:36,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:59:36,248 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:59:36,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:59:36,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:59:36,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:59:36,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:59:36,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:59:36,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 02:59:36,249 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 02:59:36,249 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 02:59:36,250 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:59:36,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:59:36,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:59:36,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:59:36,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:59:36,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:59:36,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:59:36,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:59:36,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:59:36,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:59:36,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:59:36,252 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 02:59:36,252 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 02:59:36,252 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:59:36,252 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:59:36,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:59:36,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 02:59:36,253 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e [2022-07-21 02:59:36,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:59:36,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:59:36,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:59:36,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:59:36,552 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:59:36,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max.c [2022-07-21 02:59:36,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39388098a/21ea595b64d4411f882e67735fb201a8/FLAG65d5a653e [2022-07-21 02:59:36,981 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:59:36,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c [2022-07-21 02:59:36,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39388098a/21ea595b64d4411f882e67735fb201a8/FLAG65d5a653e [2022-07-21 02:59:36,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39388098a/21ea595b64d4411f882e67735fb201a8 [2022-07-21 02:59:36,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:59:37,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:59:37,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:59:37,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:59:37,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:59:37,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:59:36" (1/1) ... [2022-07-21 02:59:37,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b88c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37, skipping insertion in model container [2022-07-21 02:59:37,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:59:36" (1/1) ... [2022-07-21 02:59:37,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:59:37,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:59:37,137 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/verifythis/elimination_max.c[485,498] [2022-07-21 02:59:37,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:59:37,191 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:59:37,201 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/verifythis/elimination_max.c[485,498] [2022-07-21 02:59:37,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:59:37,229 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:59:37,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37 WrapperNode [2022-07-21 02:59:37,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:59:37,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:59:37,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:59:37,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:59:37,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,263 INFO L137 Inliner]: procedures = 20, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-07-21 02:59:37,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:59:37,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:59:37,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:59:37,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:59:37,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:59:37,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:59:37,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:59:37,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:59:37,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (1/1) ... [2022-07-21 02:59:37,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:59:37,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:59:37,321 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) [2022-07-21 02:59:37,331 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 [2022-07-21 02:59:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:59:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 02:59:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 02:59:37,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 02:59:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 02:59:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 02:59:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:59:37,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:59:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 02:59:37,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 02:59:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 02:59:37,427 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:59:37,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:59:37,571 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:59:37,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:59:37,575 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 02:59:37,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:59:37 BoogieIcfgContainer [2022-07-21 02:59:37,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:59:37,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:59:37,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:59:37,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:59:37,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:59:36" (1/3) ... [2022-07-21 02:59:37,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2831109e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:59:37, skipping insertion in model container [2022-07-21 02:59:37,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:59:37" (2/3) ... [2022-07-21 02:59:37,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2831109e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:59:37, skipping insertion in model container [2022-07-21 02:59:37,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:59:37" (3/3) ... [2022-07-21 02:59:37,587 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2022-07-21 02:59:37,599 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:59:37,599 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:59:37,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:59:37,647 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@4148bf91, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7beaad43 [2022-07-21 02:59:37,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:59:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 02:59:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:59:37,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:37,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:59:37,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash 434333419, now seen corresponding path program 1 times [2022-07-21 02:59:37,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:59:37,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193477656] [2022-07-21 02:59:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:37,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:59:37,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:59:37,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:59:37,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 02:59:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:37,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 02:59:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:59:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:59:37,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:59:37,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:59:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193477656] [2022-07-21 02:59:37,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193477656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:59:37,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:59:37,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:59:37,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678057699] [2022-07-21 02:59:37,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:59:37,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:59:37,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:59:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:59:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:59:37,787 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:59:37,799 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-07-21 02:59:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:59:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-21 02:59:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:59:37,805 INFO L225 Difference]: With dead ends: 57 [2022-07-21 02:59:37,805 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 02:59:37,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:59:37,809 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-07-21 02:59:37,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:59:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 02:59:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-21 02:59:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 02:59:37,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-21 02:59:37,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2022-07-21 02:59:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:59:37,832 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-21 02:59:37,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-21 02:59:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:59:37,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:37,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:59:37,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:59:38,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:59:38,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:38,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1040778997, now seen corresponding path program 1 times [2022-07-21 02:59:38,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:59:38,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412996900] [2022-07-21 02:59:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:38,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:59:38,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:59:38,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:59:38,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 02:59:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:38,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 02:59:38,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:59:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:59:38,459 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:59:38,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-21 02:59:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:59:38,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:59:38,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:59:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412996900] [2022-07-21 02:59:38,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412996900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:59:38,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:59:38,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 02:59:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083755766] [2022-07-21 02:59:38,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:59:38,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 02:59:38,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:59:38,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 02:59:38,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:59:38,526 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:59:38,891 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-07-21 02:59:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:59:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-21 02:59:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:59:38,894 INFO L225 Difference]: With dead ends: 39 [2022-07-21 02:59:38,894 INFO L226 Difference]: Without dead ends: 37 [2022-07-21 02:59:38,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:59:38,895 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:59:38,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 142 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 134 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-07-21 02:59:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-21 02:59:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-21 02:59:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 02:59:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-21 02:59:38,903 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2022-07-21 02:59:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:59:38,903 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-21 02:59:38,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-21 02:59:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 02:59:38,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:38,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:59:38,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:59:39,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:59:39,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:39,115 INFO L85 PathProgramCache]: Analyzing trace with hash 953578392, now seen corresponding path program 1 times [2022-07-21 02:59:39,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:59:39,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364554762] [2022-07-21 02:59:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:39,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:59:39,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:59:39,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:59:39,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 02:59:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 02:59:39,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:59:39,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:59:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:59:39,736 INFO L356 Elim1Store]: treesize reduction 10, result has 73.7 percent of original size [2022-07-21 02:59:39,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 37 [2022-07-21 02:59:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:59:39,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:59:40,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:59:40,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364554762] [2022-07-21 02:59:40,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364554762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:59:40,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2095988557] [2022-07-21 02:59:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:40,100 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 02:59:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 02:59:40,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 02:59:40,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-07-21 02:59:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 02:59:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:59:40,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-07-21 02:59:43,869 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_2| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_2|))) is different from true [2022-07-21 02:59:44,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-07-21 02:59:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:59:44,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:59:44,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2095988557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:59:44,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:59:44,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 21 [2022-07-21 02:59:44,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258439383] [2022-07-21 02:59:44,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:59:44,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:59:44,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:59:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:59:44,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=487, Unknown=1, NotChecked=44, Total=600 [2022-07-21 02:59:44,651 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:59:44,734 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-07-21 02:59:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 02:59:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-07-21 02:59:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:59:44,736 INFO L225 Difference]: With dead ends: 45 [2022-07-21 02:59:44,736 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 02:59:44,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=89, Invalid=616, Unknown=1, NotChecked=50, Total=756 [2022-07-21 02:59:44,737 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:59:44,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 116 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-07-21 02:59:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 02:59:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-07-21 02:59:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 02:59:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-07-21 02:59:44,744 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2022-07-21 02:59:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:59:44,745 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-07-21 02:59:44,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:59:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-07-21 02:59:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 02:59:44,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:44,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:59:44,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:59:44,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:59:45,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:59:45,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1270583733, now seen corresponding path program 1 times [2022-07-21 02:59:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:59:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715882990] [2022-07-21 02:59:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:45,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:59:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:59:45,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:59:45,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 02:59:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:45,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 02:59:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:59:45,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 02:59:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:59:45,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:59:45,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:59:45,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715882990] [2022-07-21 02:59:45,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715882990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:59:45,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:59:45,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 02:59:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183006311] [2022-07-21 02:59:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:59:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:59:45,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:59:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:59:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:59:45,253 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 02:59:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:59:45,342 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-07-21 02:59:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:59:45,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-21 02:59:45,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:59:45,344 INFO L225 Difference]: With dead ends: 55 [2022-07-21 02:59:45,344 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 02:59:45,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:59:45,346 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:59:45,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:59:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 02:59:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-07-21 02:59:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 02:59:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-07-21 02:59:45,352 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 28 [2022-07-21 02:59:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:59:45,353 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-07-21 02:59:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 02:59:45,353 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-07-21 02:59:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 02:59:45,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:45,354 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 02:59:45,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 02:59:45,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:59:45,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1943727032, now seen corresponding path program 1 times [2022-07-21 02:59:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:59:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558535928] [2022-07-21 02:59:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:45,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:59:45,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:59:45,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:59:45,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 02:59:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 02:59:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:59:46,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 02:59:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 02:59:46,169 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 02:59:46,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-07-21 02:59:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:59:46,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:59:46,712 INFO L356 Elim1Store]: treesize reduction 71, result has 19.3 percent of original size [2022-07-21 02:59:46,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 24 [2022-07-21 02:59:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:59:46,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 02:59:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558535928] [2022-07-21 02:59:46,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558535928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:59:46,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:59:46,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-07-21 02:59:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691399207] [2022-07-21 02:59:46,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 02:59:46,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 02:59:46,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 02:59:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 02:59:46,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-07-21 02:59:46,816 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 02:59:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:59:48,355 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-07-21 02:59:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 02:59:48,356 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-07-21 02:59:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:59:48,357 INFO L225 Difference]: With dead ends: 93 [2022-07-21 02:59:48,357 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 02:59:48,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 02:59:48,358 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 99 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 02:59:48,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 380 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 354 Invalid, 0 Unknown, 71 Unchecked, 0.6s Time] [2022-07-21 02:59:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 02:59:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2022-07-21 02:59:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 02:59:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-07-21 02:59:48,368 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 30 [2022-07-21 02:59:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:59:48,369 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-07-21 02:59:48,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 02:59:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-07-21 02:59:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 02:59:48,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:59:48,370 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 02:59:48,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-21 02:59:48,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 02:59:48,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:59:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:59:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1112024125, now seen corresponding path program 1 times [2022-07-21 02:59:48,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 02:59:48,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825686640] [2022-07-21 02:59:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:59:48,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 02:59:48,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 02:59:48,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 02:59:48,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 02:59:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:59:48,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 02:59:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:00:25,891 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 03:00:32,148 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 03:00:35,726 INFO L356 Elim1Store]: treesize reduction 64, result has 94.2 percent of original size [2022-07-21 03:00:35,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 159 treesize of output 1067