./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr5.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 c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:56:11,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:56:11,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:56:11,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:56:11,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:56:11,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:56:11,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:56:11,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:56:11,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:56:11,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:56:11,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:56:11,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:56:11,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:56:11,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:56:11,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:56:11,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:56:11,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:56:11,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:56:11,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:56:11,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:56:11,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:56:11,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:56:11,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:56:11,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:56:11,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:56:11,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:56:11,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:56:11,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:56:11,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:56:11,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:56:11,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:56:11,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:56:11,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:56:11,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:56:11,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:56:11,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:56:11,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:56:11,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:56:11,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:56:11,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:56:11,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:56:11,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:56:11,930 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:56:11,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:56:11,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:56:11,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:56:11,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:56:11,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:56:11,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:56:11,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:56:11,937 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:56:11,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:56:11,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:56:11,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:56:11,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:56:11,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:56:11,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:56:11,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:56:11,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:56:11,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:56:11,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:56:11,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:56:11,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:56:11,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:56:11,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:56:11,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:56:11,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:56:11,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:56:11,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:56:11,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:56:11,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:56:11,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:56:11,941 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:56:11,941 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:56:11,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:56:11,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:56:11,942 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2021-12-21 09:56:12,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:56:12,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:56:12,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:56:12,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:56:12,217 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:56:12,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr5.c [2021-12-21 09:56:12,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f953be8e/9e9522466ea34f2da2922582fed8a715/FLAG15143cac1 [2021-12-21 09:56:12,714 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:56:12,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c [2021-12-21 09:56:12,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f953be8e/9e9522466ea34f2da2922582fed8a715/FLAG15143cac1 [2021-12-21 09:56:12,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f953be8e/9e9522466ea34f2da2922582fed8a715 [2021-12-21 09:56:12,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:56:12,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:56:12,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:56:12,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:56:12,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:56:12,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:12" (1/1) ... [2021-12-21 09:56:12,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765544a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:12, skipping insertion in model container [2021-12-21 09:56:12,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:12" (1/1) ... [2021-12-21 09:56:12,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:56:12,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:56:12,906 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-12-21 09:56:12,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:56:12,948 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:56:12,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-12-21 09:56:12,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:56:13,005 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:56:13,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13 WrapperNode [2021-12-21 09:56:13,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:56:13,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:56:13,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:56:13,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:56:13,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,049 INFO L137 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2021-12-21 09:56:13,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:56:13,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:56:13,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:56:13,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:56:13,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:56:13,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:56:13,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:56:13,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:56:13,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (1/1) ... [2021-12-21 09:56:13,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:56:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:13,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 09:56:13,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 09:56:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:56:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:56:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:56:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 09:56:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-21 09:56:13,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-21 09:56:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:56:13,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:56:13,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:56:13,216 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:56:13,218 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:56:13,532 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:56:13,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:56:13,545 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 09:56:13,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:13 BoogieIcfgContainer [2021-12-21 09:56:13,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:56:13,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:56:13,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:56:13,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:56:13,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:56:12" (1/3) ... [2021-12-21 09:56:13,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412af0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:56:13, skipping insertion in model container [2021-12-21 09:56:13,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:13" (2/3) ... [2021-12-21 09:56:13,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412af0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:56:13, skipping insertion in model container [2021-12-21 09:56:13,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:13" (3/3) ... [2021-12-21 09:56:13,557 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2021-12-21 09:56:13,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:56:13,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:56:13,612 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:56:13,620 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:56:13,620 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:56:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 09:56:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 09:56:13,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:13,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:13,656 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:13,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1765780314, now seen corresponding path program 1 times [2021-12-21 09:56:13,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:13,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491142094] [2021-12-21 09:56:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:13,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:13,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:13,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491142094] [2021-12-21 09:56:13,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491142094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:56:13,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:56:13,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 09:56:13,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704799361] [2021-12-21 09:56:13,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:56:13,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 09:56:13,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 09:56:13,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:56:13,954 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:13,980 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2021-12-21 09:56:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 09:56:13,983 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 09:56:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:13,988 INFO L225 Difference]: With dead ends: 69 [2021-12-21 09:56:13,989 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 09:56:13,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:56:13,995 INFO L933 BasicCegarLoop]: 49 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, 49 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 [2021-12-21 09:56:13,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:56:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 09:56:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-21 09:56:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 09:56:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-12-21 09:56:14,034 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2021-12-21 09:56:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:14,034 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-12-21 09:56:14,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-12-21 09:56:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 09:56:14,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:14,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:14,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:56:14,039 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1807338759, now seen corresponding path program 1 times [2021-12-21 09:56:14,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:14,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750206453] [2021-12-21 09:56:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:14,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:56:14,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:14,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750206453] [2021-12-21 09:56:14,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750206453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:56:14,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:56:14,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 09:56:14,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875749179] [2021-12-21 09:56:14,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:56:14,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 09:56:14,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 09:56:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:56:14,297 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:14,433 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-12-21 09:56:14,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 09:56:14,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 09:56:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:14,436 INFO L225 Difference]: With dead ends: 57 [2021-12-21 09:56:14,436 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 09:56:14,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:56:14,443 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:14,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:56:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 09:56:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2021-12-21 09:56:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 09:56:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-12-21 09:56:14,464 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 11 [2021-12-21 09:56:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:14,465 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-12-21 09:56:14,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:56:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-12-21 09:56:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 09:56:14,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:14,467 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:14,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 09:56:14,467 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1950771071, now seen corresponding path program 1 times [2021-12-21 09:56:14,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:14,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692875073] [2021-12-21 09:56:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:14,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:14,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:14,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:14,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:14,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:14,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:14,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:14,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692875073] [2021-12-21 09:56:14,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692875073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:14,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243437977] [2021-12-21 09:56:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:14,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:14,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:14,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:14,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:56:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:14,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 09:56:14,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:14,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 09:56:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:15,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-21 09:56:15,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:15,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-21 09:56:15,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:15,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-21 09:56:15,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:15,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 09:56:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:15,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:15,404 INFO L387 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 13 [2021-12-21 09:56:15,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 22 [2021-12-21 09:56:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:15,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243437977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:15,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:15,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2021-12-21 09:56:15,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185927462] [2021-12-21 09:56:15,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:15,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 09:56:15,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 09:56:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-21 09:56:15,445 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:15,879 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2021-12-21 09:56:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 09:56:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2021-12-21 09:56:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:15,881 INFO L225 Difference]: With dead ends: 120 [2021-12-21 09:56:15,881 INFO L226 Difference]: Without dead ends: 118 [2021-12-21 09:56:15,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-21 09:56:15,883 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:15,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 293 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:56:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-21 09:56:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2021-12-21 09:56:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 09:56:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2021-12-21 09:56:15,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 43 [2021-12-21 09:56:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:15,896 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2021-12-21 09:56:15,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2021-12-21 09:56:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 09:56:15,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:15,898 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:15,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:16,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:16,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1642596351, now seen corresponding path program 1 times [2021-12-21 09:56:16,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:16,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839975999] [2021-12-21 09:56:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:16,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:16,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:16,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:16,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:16,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:16,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:16,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:16,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839975999] [2021-12-21 09:56:16,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839975999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:16,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619210642] [2021-12-21 09:56:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:16,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:16,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:16,336 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:16,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:56:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:16,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 09:56:16,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:16,514 INFO L387 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 16 treesize of output 12 [2021-12-21 09:56:16,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:16,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:56:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:16,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:56:16,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:16,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:56:16,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:16,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-21 09:56:16,987 INFO L387 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 [2021-12-21 09:56:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 09:56:17,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:17,221 INFO L387 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 13 [2021-12-21 09:56:17,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 treesize of output 26 [2021-12-21 09:56:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:17,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619210642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:17,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:17,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-21 09:56:17,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206162887] [2021-12-21 09:56:17,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:17,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 09:56:17,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 09:56:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-21 09:56:17,296 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-21 09:56:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:18,044 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2021-12-21 09:56:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 09:56:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 43 [2021-12-21 09:56:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:18,048 INFO L225 Difference]: With dead ends: 179 [2021-12-21 09:56:18,048 INFO L226 Difference]: Without dead ends: 177 [2021-12-21 09:56:18,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 09:56:18,049 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:18,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 516 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 643 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2021-12-21 09:56:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-21 09:56:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 87. [2021-12-21 09:56:18,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.359375) internal successors, (87), 65 states have internal predecessors, (87), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-21 09:56:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2021-12-21 09:56:18,074 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 43 [2021-12-21 09:56:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:18,074 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2021-12-21 09:56:18,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-21 09:56:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2021-12-21 09:56:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 09:56:18,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:18,076 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:18,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 09:56:18,300 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1666037387, now seen corresponding path program 1 times [2021-12-21 09:56:18,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:18,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298462274] [2021-12-21 09:56:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:18,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:18,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:18,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:18,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:18,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:18,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:18,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298462274] [2021-12-21 09:56:18,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298462274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840759868] [2021-12-21 09:56:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:18,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:18,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:18,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:56:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 09:56:18,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:18,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 09:56:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:18,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-21 09:56:18,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:18,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-21 09:56:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:18,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:56:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:18,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:18,907 INFO L387 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 17 treesize of output 15 [2021-12-21 09:56:18,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 26 [2021-12-21 09:56:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:18,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840759868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:18,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:18,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-21 09:56:18,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476387006] [2021-12-21 09:56:18,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:18,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 09:56:18,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 09:56:18,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:56:18,951 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:19,366 INFO L93 Difference]: Finished difference Result 322 states and 492 transitions. [2021-12-21 09:56:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 09:56:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2021-12-21 09:56:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:19,369 INFO L225 Difference]: With dead ends: 322 [2021-12-21 09:56:19,369 INFO L226 Difference]: Without dead ends: 320 [2021-12-21 09:56:19,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-21 09:56:19,370 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:19,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 345 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:56:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-21 09:56:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 153. [2021-12-21 09:56:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.3928571428571428) internal successors, (156), 114 states have internal predecessors, (156), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-21 09:56:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-12-21 09:56:19,399 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 47 [2021-12-21 09:56:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:19,400 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-12-21 09:56:19,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-12-21 09:56:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 09:56:19,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:19,402 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:19,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:19,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:19,624 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash -279833993, now seen corresponding path program 1 times [2021-12-21 09:56:19,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:19,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488456135] [2021-12-21 09:56:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:19,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:19,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:19,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:19,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:19,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:19,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:19,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488456135] [2021-12-21 09:56:19,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488456135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:19,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408320837] [2021-12-21 09:56:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:19,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:19,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:19,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:19,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:56:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 09:56:19,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:20,022 INFO L387 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 16 treesize of output 12 [2021-12-21 09:56:20,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:20,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:56:20,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:20,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:56:20,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:56:20,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 09:56:20,476 INFO L387 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 [2021-12-21 09:56:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 09:56:20,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:20,854 INFO L387 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 17 treesize of output 15 [2021-12-21 09:56:20,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 34 treesize of output 30 [2021-12-21 09:56:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:20,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408320837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:20,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:20,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-12-21 09:56:20,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186824899] [2021-12-21 09:56:20,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:20,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 09:56:20,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 09:56:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-21 09:56:20,973 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-21 09:56:22,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:22,086 INFO L93 Difference]: Finished difference Result 432 states and 643 transitions. [2021-12-21 09:56:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 09:56:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 47 [2021-12-21 09:56:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:22,090 INFO L225 Difference]: With dead ends: 432 [2021-12-21 09:56:22,090 INFO L226 Difference]: Without dead ends: 430 [2021-12-21 09:56:22,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 09:56:22,091 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 182 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:22,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 629 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 684 Invalid, 0 Unknown, 86 Unchecked, 0.7s Time] [2021-12-21 09:56:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-12-21 09:56:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 220. [2021-12-21 09:56:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 161 states have internal predecessors, (223), 57 states have call successors, (57), 4 states have call predecessors, (57), 4 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-12-21 09:56:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 337 transitions. [2021-12-21 09:56:22,124 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 337 transitions. Word has length 47 [2021-12-21 09:56:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:22,125 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 337 transitions. [2021-12-21 09:56:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-21 09:56:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 337 transitions. [2021-12-21 09:56:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 09:56:22,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:22,127 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:22,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:22,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:22,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash 131088491, now seen corresponding path program 2 times [2021-12-21 09:56:22,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:22,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487296633] [2021-12-21 09:56:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:22,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:22,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:22,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:22,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:22,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:22,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:22,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:22,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487296633] [2021-12-21 09:56:22,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487296633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:22,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434784912] [2021-12-21 09:56:22,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:56:22,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:22,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:22,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:22,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 09:56:22,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:56:22,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 09:56:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:22,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 09:56:22,628 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-21 09:56:22,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-21 09:56:22,672 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 09:56:22,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:56:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:22,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:23,023 INFO L387 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 17 treesize of output 15 [2021-12-21 09:56:23,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 26 [2021-12-21 09:56:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:23,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434784912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:23,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:23,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-21 09:56:23,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554732598] [2021-12-21 09:56:23,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:23,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 09:56:23,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:23,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 09:56:23,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 09:56:23,123 INFO L87 Difference]: Start difference. First operand 220 states and 337 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 09:56:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:23,960 INFO L93 Difference]: Finished difference Result 1182 states and 1872 transitions. [2021-12-21 09:56:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:56:23,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2021-12-21 09:56:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:23,966 INFO L225 Difference]: With dead ends: 1182 [2021-12-21 09:56:23,966 INFO L226 Difference]: Without dead ends: 1180 [2021-12-21 09:56:23,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-12-21 09:56:23,968 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 95 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:23,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 479 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 09:56:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-12-21 09:56:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 481. [2021-12-21 09:56:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 346 states have (on average 1.4421965317919074) internal successors, (499), 349 states have internal predecessors, (499), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 127 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-21 09:56:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 759 transitions. [2021-12-21 09:56:24,037 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 759 transitions. Word has length 51 [2021-12-21 09:56:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:24,037 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 759 transitions. [2021-12-21 09:56:24,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 09:56:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 759 transitions. [2021-12-21 09:56:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 09:56:24,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:24,039 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:24,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:24,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:24,259 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2054316525, now seen corresponding path program 1 times [2021-12-21 09:56:24,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:24,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492003582] [2021-12-21 09:56:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:24,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:24,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:24,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:24,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:24,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:24,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:24,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492003582] [2021-12-21 09:56:24,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492003582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623330211] [2021-12-21 09:56:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:24,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:24,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:24,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:24,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 09:56:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:24,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 09:56:24,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:24,560 INFO L387 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 16 treesize of output 12 [2021-12-21 09:56:24,638 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-21 09:56:24,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:56:24,702 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 09:56:24,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 09:56:24,840 INFO L387 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 19 treesize of output 7 [2021-12-21 09:56:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 09:56:24,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:25,022 INFO L387 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 17 treesize of output 15 [2021-12-21 09:56:25,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 34 treesize of output 30 [2021-12-21 09:56:25,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623330211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:25,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 09:56:25,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-21 09:56:25,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513165317] [2021-12-21 09:56:25,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:25,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 09:56:25,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:25,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 09:56:25,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-21 09:56:25,077 INFO L87 Difference]: Start difference. First operand 481 states and 759 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:26,078 INFO L93 Difference]: Finished difference Result 1111 states and 1714 transitions. [2021-12-21 09:56:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 09:56:26,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 51 [2021-12-21 09:56:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:26,084 INFO L225 Difference]: With dead ends: 1111 [2021-12-21 09:56:26,084 INFO L226 Difference]: Without dead ends: 1109 [2021-12-21 09:56:26,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=354, Invalid=1998, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:56:26,086 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 181 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:26,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 551 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 648 Invalid, 0 Unknown, 104 Unchecked, 0.5s Time] [2021-12-21 09:56:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-12-21 09:56:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 573. [2021-12-21 09:56:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 408 states have (on average 1.4411764705882353) internal successors, (588), 415 states have internal predecessors, (588), 156 states have call successors, (156), 8 states have call predecessors, (156), 8 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2021-12-21 09:56:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 900 transitions. [2021-12-21 09:56:26,156 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 900 transitions. Word has length 51 [2021-12-21 09:56:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:26,156 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 900 transitions. [2021-12-21 09:56:26,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 900 transitions. [2021-12-21 09:56:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 09:56:26,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:26,158 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:26,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:26,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:26,380 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 881708129, now seen corresponding path program 3 times [2021-12-21 09:56:26,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:26,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486899506] [2021-12-21 09:56:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:26,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:26,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:26,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:26,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:26,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:26,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:26,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:26,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486899506] [2021-12-21 09:56:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486899506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017369139] [2021-12-21 09:56:26,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:56:26,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:26,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:26,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 09:56:26,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 09:56:26,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 09:56:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:26,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 09:56:28,905 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 09:56:28,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:56:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 09:56:29,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:37,776 INFO L387 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 18 treesize of output 16 [2021-12-21 09:56:37,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 32 [2021-12-21 09:56:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017369139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:37,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 09:56:37,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-21 09:56:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368648687] [2021-12-21 09:56:37,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:37,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 09:56:37,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 09:56:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=500, Unknown=5, NotChecked=0, Total=600 [2021-12-21 09:56:37,810 INFO L87 Difference]: Start difference. First operand 573 states and 900 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:42,866 INFO L93 Difference]: Finished difference Result 2119 states and 3338 transitions. [2021-12-21 09:56:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 09:56:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2021-12-21 09:56:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:42,877 INFO L225 Difference]: With dead ends: 2119 [2021-12-21 09:56:42,877 INFO L226 Difference]: Without dead ends: 2117 [2021-12-21 09:56:42,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=390, Invalid=1859, Unknown=7, NotChecked=0, Total=2256 [2021-12-21 09:56:42,880 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 248 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:42,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 676 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 936 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2021-12-21 09:56:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-12-21 09:56:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1785. [2021-12-21 09:56:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1268 states have (on average 1.4652996845425867) internal successors, (1858), 1275 states have internal predecessors, (1858), 500 states have call successors, (500), 16 states have call predecessors, (500), 16 states have return successors, (500), 493 states have call predecessors, (500), 500 states have call successors, (500) [2021-12-21 09:56:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 2858 transitions. [2021-12-21 09:56:43,115 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 2858 transitions. Word has length 55 [2021-12-21 09:56:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:43,116 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 2858 transitions. [2021-12-21 09:56:43,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 2858 transitions. [2021-12-21 09:56:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 09:56:43,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:43,120 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:43,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:43,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:43,347 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:43,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1022256739, now seen corresponding path program 1 times [2021-12-21 09:56:43,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:43,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10306983] [2021-12-21 09:56:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:43,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:43,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:43,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:43,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:43,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:43,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:43,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10306983] [2021-12-21 09:56:43,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10306983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399657201] [2021-12-21 09:56:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:43,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:43,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:43,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:43,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 09:56:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:43,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 09:56:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:43,781 INFO L387 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 16 treesize of output 12 [2021-12-21 09:56:43,858 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 09:56:43,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 09:56:44,039 INFO L387 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 19 treesize of output 7 [2021-12-21 09:56:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 09:56:44,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:46,217 INFO L387 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 17 treesize of output 15 [2021-12-21 09:56:46,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 34 treesize of output 30 [2021-12-21 09:56:46,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399657201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:46,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 09:56:46,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-21 09:56:46,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537321002] [2021-12-21 09:56:46,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:46,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 09:56:46,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 09:56:46,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=523, Unknown=1, NotChecked=0, Total=600 [2021-12-21 09:56:46,275 INFO L87 Difference]: Start difference. First operand 1785 states and 2858 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:48,063 INFO L93 Difference]: Finished difference Result 4226 states and 6697 transitions. [2021-12-21 09:56:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-21 09:56:48,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2021-12-21 09:56:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:48,080 INFO L225 Difference]: With dead ends: 4226 [2021-12-21 09:56:48,080 INFO L226 Difference]: Without dead ends: 4224 [2021-12-21 09:56:48,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=433, Invalid=2988, Unknown=1, NotChecked=0, Total=3422 [2021-12-21 09:56:48,084 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 329 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:48,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 782 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 1135 Invalid, 0 Unknown, 137 Unchecked, 0.8s Time] [2021-12-21 09:56:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2021-12-21 09:56:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 2269. [2021-12-21 09:56:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 1608 states have (on average 1.4676616915422886) internal successors, (2360), 1616 states have internal predecessors, (2360), 636 states have call successors, (636), 24 states have call predecessors, (636), 24 states have return successors, (636), 628 states have call predecessors, (636), 636 states have call successors, (636) [2021-12-21 09:56:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3632 transitions. [2021-12-21 09:56:48,407 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3632 transitions. Word has length 55 [2021-12-21 09:56:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:48,408 INFO L470 AbstractCegarLoop]: Abstraction has 2269 states and 3632 transitions. [2021-12-21 09:56:48,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 09:56:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3632 transitions. [2021-12-21 09:56:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 09:56:48,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:48,411 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:48,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:48,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 09:56:48,636 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871831, now seen corresponding path program 4 times [2021-12-21 09:56:48,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715118013] [2021-12-21 09:56:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:48,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:48,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:48,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:48,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:48,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:48,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:48,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715118013] [2021-12-21 09:56:48,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715118013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:48,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888189004] [2021-12-21 09:56:48,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:56:48,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:48,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:48,757 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:48,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 09:56:48,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:56:48,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:56:48,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 09:56:48,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:48,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 09:56:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:49,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:49,098 INFO L387 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 17 treesize of output 15 [2021-12-21 09:56:49,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 26 [2021-12-21 09:56:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:49,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888189004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:56:49,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:56:49,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 16 [2021-12-21 09:56:49,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023929709] [2021-12-21 09:56:49,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:49,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 09:56:49,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 09:56:49,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-21 09:56:49,173 INFO L87 Difference]: Start difference. First operand 2269 states and 3632 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 09:56:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:53,251 INFO L93 Difference]: Finished difference Result 15826 states and 25522 transitions. [2021-12-21 09:56:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-21 09:56:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-12-21 09:56:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:53,315 INFO L225 Difference]: With dead ends: 15826 [2021-12-21 09:56:53,316 INFO L226 Difference]: Without dead ends: 15824 [2021-12-21 09:56:53,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=777, Invalid=6195, Unknown=0, NotChecked=0, Total=6972 [2021-12-21 09:56:53,330 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 339 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 4112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:53,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1740 Invalid, 4112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 09:56:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-12-21 09:56:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 6227. [2021-12-21 09:56:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6227 states, 4410 states have (on average 1.482766439909297) internal successors, (6539), 4410 states have internal predecessors, (6539), 1792 states have call successors, (1792), 24 states have call predecessors, (1792), 24 states have return successors, (1792), 1792 states have call predecessors, (1792), 1792 states have call successors, (1792) [2021-12-21 09:56:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6227 states to 6227 states and 10123 transitions. [2021-12-21 09:56:54,341 INFO L78 Accepts]: Start accepts. Automaton has 6227 states and 10123 transitions. Word has length 59 [2021-12-21 09:56:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:54,342 INFO L470 AbstractCegarLoop]: Abstraction has 6227 states and 10123 transitions. [2021-12-21 09:56:54,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 09:56:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 6227 states and 10123 transitions. [2021-12-21 09:56:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 09:56:54,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:54,347 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:54,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:54,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:54,560 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:54,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash 58433497, now seen corresponding path program 1 times [2021-12-21 09:56:54,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:54,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445531551] [2021-12-21 09:56:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:54,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:54,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:54,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:54,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:54,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:54,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:54,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445531551] [2021-12-21 09:56:54,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445531551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:54,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778505680] [2021-12-21 09:56:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:54,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:54,711 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:54,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 09:56:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 09:56:54,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:56:54,944 INFO L387 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 13 treesize of output 9 [2021-12-21 09:56:55,176 INFO L387 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 19 treesize of output 7 [2021-12-21 09:56:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:55,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:56:55,359 INFO L387 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 17 treesize of output 15 [2021-12-21 09:56:55,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 34 treesize of output 30 [2021-12-21 09:56:55,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778505680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:55,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 09:56:55,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-12-21 09:56:55,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180981965] [2021-12-21 09:56:55,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 09:56:55,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 09:56:55,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:56:55,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 09:56:55,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-12-21 09:56:55,413 INFO L87 Difference]: Start difference. First operand 6227 states and 10123 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 09:56:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:56:58,695 INFO L93 Difference]: Finished difference Result 11401 states and 18297 transitions. [2021-12-21 09:56:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-21 09:56:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2021-12-21 09:56:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:56:58,724 INFO L225 Difference]: With dead ends: 11401 [2021-12-21 09:56:58,724 INFO L226 Difference]: Without dead ends: 11399 [2021-12-21 09:56:58,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1049, Invalid=5757, Unknown=0, NotChecked=0, Total=6806 [2021-12-21 09:56:58,734 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 347 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 09:56:58,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 936 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 09:56:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-12-21 09:56:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 2317. [2021-12-21 09:56:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1656 states have (on average 1.458937198067633) internal successors, (2416), 1664 states have internal predecessors, (2416), 636 states have call successors, (636), 24 states have call predecessors, (636), 24 states have return successors, (636), 628 states have call predecessors, (636), 636 states have call successors, (636) [2021-12-21 09:56:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3688 transitions. [2021-12-21 09:56:59,325 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3688 transitions. Word has length 59 [2021-12-21 09:56:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:56:59,326 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3688 transitions. [2021-12-21 09:56:59,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 09:56:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3688 transitions. [2021-12-21 09:56:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 09:56:59,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:56:59,329 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:56:59,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 09:56:59,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 09:56:59,544 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:56:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:56:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash 819831629, now seen corresponding path program 5 times [2021-12-21 09:56:59,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:56:59,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051119273] [2021-12-21 09:56:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:56:59,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:56:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:59,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:56:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:59,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:56:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:59,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:56:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:59,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:56:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:59,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:56:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:56:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:56:59,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:56:59,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051119273] [2021-12-21 09:56:59,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051119273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:56:59,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018898671] [2021-12-21 09:56:59,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:56:59,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:56:59,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:56:59,880 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:56:59,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 09:57:00,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-21 09:57:00,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:57:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:57:00,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 09:57:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018898671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:57:00,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:57:00,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2021-12-21 09:57:00,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400059700] [2021-12-21 09:57:00,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:00,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-21 09:57:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-21 09:57:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 09:57:00,911 INFO L87 Difference]: Start difference. First operand 2317 states and 3688 transitions. Second operand has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-21 09:57:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:01,606 INFO L93 Difference]: Finished difference Result 2684 states and 4253 transitions. [2021-12-21 09:57:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 09:57:01,606 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 63 [2021-12-21 09:57:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:01,613 INFO L225 Difference]: With dead ends: 2684 [2021-12-21 09:57:01,613 INFO L226 Difference]: Without dead ends: 2656 [2021-12-21 09:57:01,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 09:57:01,615 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 400 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:01,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 152 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:57:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-12-21 09:57:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2349. [2021-12-21 09:57:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 1688 states have (on average 1.4502369668246446) internal successors, (2448), 1688 states have internal predecessors, (2448), 636 states have call successors, (636), 24 states have call predecessors, (636), 24 states have return successors, (636), 636 states have call predecessors, (636), 636 states have call successors, (636) [2021-12-21 09:57:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3720 transitions. [2021-12-21 09:57:02,042 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3720 transitions. Word has length 63 [2021-12-21 09:57:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:02,042 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 3720 transitions. [2021-12-21 09:57:02,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-21 09:57:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3720 transitions. [2021-12-21 09:57:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 09:57:02,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:02,047 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:02,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:02,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 09:57:02,248 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 374578441, now seen corresponding path program 2 times [2021-12-21 09:57:02,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748127816] [2021-12-21 09:57:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:02,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:57:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:57:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:57:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:57:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:57:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 09:57:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 09:57:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 09:57:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 09:57:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 09:57:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 09:57:02,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:02,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748127816] [2021-12-21 09:57:02,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748127816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:02,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42423318] [2021-12-21 09:57:02,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:57:02,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:02,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:02,476 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:02,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 09:57:02,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:57:02,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:02,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 09:57:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:02,695 INFO L387 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 16 treesize of output 12 [2021-12-21 09:57:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:02,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:02,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:02,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:02,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:02,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:03,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:57:03,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:03,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:57:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:03,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:57:03,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:03,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:57:03,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:03,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:57:03,428 INFO L387 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 [2021-12-21 09:57:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-21 09:57:03,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42423318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:03,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 09:57:03,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-21 09:57:03,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194584415] [2021-12-21 09:57:03,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:03,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 09:57:03,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 09:57:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-21 09:57:03,689 INFO L87 Difference]: Start difference. First operand 2349 states and 3720 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-21 09:57:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:05,016 INFO L93 Difference]: Finished difference Result 3549 states and 5535 transitions. [2021-12-21 09:57:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 09:57:05,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2021-12-21 09:57:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:05,037 INFO L225 Difference]: With dead ends: 3549 [2021-12-21 09:57:05,037 INFO L226 Difference]: Without dead ends: 3547 [2021-12-21 09:57:05,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 107 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 09:57:05,039 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 180 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:05,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 578 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 639 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2021-12-21 09:57:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-12-21 09:57:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2301. [2021-12-21 09:57:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 1644 states have (on average 1.4482968369829683) internal successors, (2381), 1653 states have internal predecessors, (2381), 631 states have call successors, (631), 25 states have call predecessors, (631), 25 states have return successors, (631), 622 states have call predecessors, (631), 631 states have call successors, (631) [2021-12-21 09:57:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3643 transitions. [2021-12-21 09:57:05,525 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3643 transitions. Word has length 75 [2021-12-21 09:57:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:05,526 INFO L470 AbstractCegarLoop]: Abstraction has 2301 states and 3643 transitions. [2021-12-21 09:57:05,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-21 09:57:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3643 transitions. [2021-12-21 09:57:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 09:57:05,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:05,530 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:05,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:05,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 09:57:05,743 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1525924609, now seen corresponding path program 2 times [2021-12-21 09:57:05,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515713077] [2021-12-21 09:57:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:05,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:57:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:57:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:57:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:57:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:57:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 09:57:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 09:57:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 09:57:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 09:57:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 09:57:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 09:57:05,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:05,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515713077] [2021-12-21 09:57:05,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515713077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:05,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701394195] [2021-12-21 09:57:05,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:57:05,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:05,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:06,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 09:57:06,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:57:06,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:06,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 09:57:06,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:06,186 INFO L387 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 16 treesize of output 12 [2021-12-21 09:57:06,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:06,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:06,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:06,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:06,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:06,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:06,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:06,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:06,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:06,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:06,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:06,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:06,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:57:06,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:06,797 INFO L387 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 [2021-12-21 09:57:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-21 09:57:06,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:07,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701394195] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:07,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 09:57:07,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-21 09:57:07,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814702194] [2021-12-21 09:57:07,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:07,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 09:57:07,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 09:57:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-21 09:57:07,046 INFO L87 Difference]: Start difference. First operand 2301 states and 3643 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-21 09:57:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:08,298 INFO L93 Difference]: Finished difference Result 2453 states and 3835 transitions. [2021-12-21 09:57:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 09:57:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 79 [2021-12-21 09:57:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:08,306 INFO L225 Difference]: With dead ends: 2453 [2021-12-21 09:57:08,306 INFO L226 Difference]: Without dead ends: 2451 [2021-12-21 09:57:08,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 111 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 09:57:08,308 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 202 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:08,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 439 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 600 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2021-12-21 09:57:08,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-12-21 09:57:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1631. [2021-12-21 09:57:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1164 states have (on average 1.4355670103092784) internal successors, (1671), 1170 states have internal predecessors, (1671), 439 states have call successors, (439), 27 states have call predecessors, (439), 27 states have return successors, (439), 433 states have call predecessors, (439), 439 states have call successors, (439) [2021-12-21 09:57:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2549 transitions. [2021-12-21 09:57:08,697 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2549 transitions. Word has length 79 [2021-12-21 09:57:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:08,697 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2549 transitions. [2021-12-21 09:57:08,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-21 09:57:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2549 transitions. [2021-12-21 09:57:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 09:57:08,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:08,701 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:08,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:08,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 09:57:08,912 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1603227147, now seen corresponding path program 2 times [2021-12-21 09:57:08,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:08,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717116805] [2021-12-21 09:57:08,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:08,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 09:57:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 09:57:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:57:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 09:57:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 09:57:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 09:57:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 09:57:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 09:57:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 09:57:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 09:57:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:57:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 09:57:09,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:57:09,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717116805] [2021-12-21 09:57:09,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717116805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:09,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996091198] [2021-12-21 09:57:09,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:57:09,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:09,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:57:09,091 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:57:09,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 09:57:09,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:57:09,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:57:09,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 09:57:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:57:09,284 INFO L387 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 16 treesize of output 12 [2021-12-21 09:57:09,379 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-21 09:57:09,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:09,437 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-21 09:57:09,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 09:57:09,531 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-21 09:57:09,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:09,596 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-21 09:57:09,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:09,656 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-21 09:57:09,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:09,712 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-21 09:57:09,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:09,769 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-21 09:57:09,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-21 09:57:09,908 INFO L387 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 19 treesize of output 7 [2021-12-21 09:57:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 63 proven. 27 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 09:57:09,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:57:12,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996091198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:57:12,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 09:57:12,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-21 09:57:12,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206741380] [2021-12-21 09:57:12,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 09:57:12,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 09:57:12,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:57:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 09:57:12,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=502, Unknown=1, NotChecked=0, Total=600 [2021-12-21 09:57:12,127 INFO L87 Difference]: Start difference. First operand 1631 states and 2549 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-21 09:57:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:57:13,145 INFO L93 Difference]: Finished difference Result 2351 states and 3658 transitions. [2021-12-21 09:57:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-21 09:57:13,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 83 [2021-12-21 09:57:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:57:13,151 INFO L225 Difference]: With dead ends: 2351 [2021-12-21 09:57:13,151 INFO L226 Difference]: Without dead ends: 2349 [2021-12-21 09:57:13,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=292, Invalid=1599, Unknown=1, NotChecked=0, Total=1892 [2021-12-21 09:57:13,153 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 115 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 09:57:13,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 823 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 866 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2021-12-21 09:57:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-12-21 09:57:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1757. [2021-12-21 09:57:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1248 states have (on average 1.4334935897435896) internal successors, (1789), 1258 states have internal predecessors, (1789), 477 states have call successors, (477), 31 states have call predecessors, (477), 31 states have return successors, (477), 467 states have call predecessors, (477), 477 states have call successors, (477) [2021-12-21 09:57:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2743 transitions. [2021-12-21 09:57:13,620 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2743 transitions. Word has length 83 [2021-12-21 09:57:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:57:13,621 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 2743 transitions. [2021-12-21 09:57:13,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-21 09:57:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2743 transitions. [2021-12-21 09:57:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 09:57:13,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:57:13,624 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:57:13,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 09:57:13,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:57:13,839 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:57:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:57:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1675613705, now seen corresponding path program 1 times [2021-12-21 09:57:13,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:57:13,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21930825] [2021-12-21 09:57:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:57:13,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:57:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat