./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr2.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 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:09:45,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:09:45,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:09:45,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:09:45,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:09:45,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:09:45,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:09:45,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:09:45,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:09:45,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:09:45,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:09:45,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:09:45,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:09:45,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:09:45,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:09:45,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:09:45,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:09:45,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:09:45,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:09:45,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:09:45,114 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:09:45,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:09:45,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:09:45,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:09:45,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:09:45,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:09:45,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:09:45,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:09:45,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:09:45,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:09:45,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:09:45,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:09:45,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:09:45,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:09:45,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:09:45,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:09:45,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:09:45,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:09:45,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:09:45,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:09:45,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:09:45,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:09:45,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:09:45,158 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:09:45,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:09:45,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:09:45,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:09:45,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:09:45,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:09:45,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:09:45,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:09:45,161 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:09:45,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:09:45,162 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:09:45,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:09:45,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:09:45,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:09:45,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:09:45,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:09:45,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:09:45,163 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:09:45,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:09:45,164 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:09:45,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:09:45,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:09:45,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:09:45,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:09:45,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:09:45,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:09:45,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:09:45,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:09:45,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:09:45,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:09:45,166 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:09:45,167 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:09:45,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:09:45,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f [2022-07-20 21:09:45,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:09:45,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:09:45,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:09:45,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:09:45,373 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:09:45,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr2.c [2022-07-20 21:09:45,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7758f99e/41db0c0be0b144f3b67016d3feb0fd0f/FLAGec87a9f7d [2022-07-20 21:09:45,755 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:09:45,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c [2022-07-20 21:09:45,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7758f99e/41db0c0be0b144f3b67016d3feb0fd0f/FLAGec87a9f7d [2022-07-20 21:09:45,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7758f99e/41db0c0be0b144f3b67016d3feb0fd0f [2022-07-20 21:09:45,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:09:45,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:09:45,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:09:45,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:09:45,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:09:45,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:45,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455324bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45, skipping insertion in model container [2022-07-20 21:09:45,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:45,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:09:45,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:09:45,914 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/pnr2.c[395,408] [2022-07-20 21:09:45,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:09:45,948 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:09:45,959 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/pnr2.c[395,408] [2022-07-20 21:09:45,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:09:45,985 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:09:45,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45 WrapperNode [2022-07-20 21:09:45,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:09:45,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:09:45,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:09:45,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:09:45,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,018 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2022-07-20 21:09:46,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:09:46,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:09:46,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:09:46,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:09:46,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:09:46,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:09:46,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:09:46,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:09:46,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (1/1) ... [2022-07-20 21:09:46,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:09:46,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:46,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:09:46,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:09:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:09:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:09:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:09:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 21:09:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-20 21:09:46,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-20 21:09:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:09:46,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:09:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:09:46,177 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:09:46,178 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:09:46,304 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:09:46,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:09:46,310 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:09:46,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:09:46 BoogieIcfgContainer [2022-07-20 21:09:46,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:09:46,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:09:46,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:09:46,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:09:46,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:09:45" (1/3) ... [2022-07-20 21:09:46,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5270a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:09:46, skipping insertion in model container [2022-07-20 21:09:46,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:45" (2/3) ... [2022-07-20 21:09:46,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5270a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:09:46, skipping insertion in model container [2022-07-20 21:09:46,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:09:46" (3/3) ... [2022-07-20 21:09:46,319 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr2.c [2022-07-20 21:09:46,328 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:09:46,328 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:09:46,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:09:46,362 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d360a0e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@319446d9 [2022-07-20 21:09:46,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:09:46,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 21:09:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:09:46,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:46,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:46,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077575, now seen corresponding path program 1 times [2022-07-20 21:09:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:46,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118568086] [2022-07-20 21:09:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:46,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:46,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118568086] [2022-07-20 21:09:46,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118568086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:09:46,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:09:46,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 21:09:46,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273704094] [2022-07-20 21:09:46,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:09:46,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 21:09:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 21:09:46,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:09:46,731 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 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) [2022-07-20 21:09:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:46,825 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-07-20 21:09:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:09:46,827 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 [2022-07-20 21:09:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:46,831 INFO L225 Difference]: With dead ends: 66 [2022-07-20 21:09:46,831 INFO L226 Difference]: Without dead ends: 32 [2022-07-20 21:09:46,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:09:46,838 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:46,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-20 21:09:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-07-20 21:09:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 21:09:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-20 21:09:46,871 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-07-20 21:09:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:46,871 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-20 21:09:46,872 INFO L496 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) [2022-07-20 21:09:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-20 21:09:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 21:09:46,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:46,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:46,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:09:46,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2094570770, now seen corresponding path program 1 times [2022-07-20 21:09:46,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:46,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440949995] [2022-07-20 21:09:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:47,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440949995] [2022-07-20 21:09:47,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440949995] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000081434] [2022-07-20 21:09:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:47,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:47,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:47,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:47,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:09:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:09:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:47,229 INFO L390 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 [2022-07-20 21:09:47,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:47,251 INFO L390 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 [2022-07-20 21:09:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:47,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:47,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 21:09:47,429 INFO L390 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 [2022-07-20 21:09:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:47,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000081434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:47,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:47,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-07-20 21:09:47,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124222925] [2022-07-20 21:09:47,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:47,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 21:09:47,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 21:09:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:09:47,453 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 21:09:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:47,645 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-20 21:09:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:09:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-07-20 21:09:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:47,646 INFO L225 Difference]: With dead ends: 66 [2022-07-20 21:09:47,655 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 21:09:47,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:09:47,656 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:47,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 192 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 21:09:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2022-07-20 21:09:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 21:09:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-07-20 21:09:47,663 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 25 [2022-07-20 21:09:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:47,665 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-07-20 21:09:47,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 21:09:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-07-20 21:09:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 21:09:47,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:47,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:47,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:47,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:47,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1613590512, now seen corresponding path program 1 times [2022-07-20 21:09:47,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:47,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105104656] [2022-07-20 21:09:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:47,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:48,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:48,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105104656] [2022-07-20 21:09:48,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105104656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:48,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424418584] [2022-07-20 21:09:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:48,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:48,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:48,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:09:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 21:09:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:48,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:09:48,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:48,220 INFO L390 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 [2022-07-20 21:09:48,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:09:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:48,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:48,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 21:09:48,363 INFO L390 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 [2022-07-20 21:09:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:48,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424418584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:48,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:48,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-20 21:09:48,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73027915] [2022-07-20 21:09:48,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:48,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:09:48,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:48,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:09:48,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:09:48,408 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:09:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:48,843 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2022-07-20 21:09:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 21:09:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2022-07-20 21:09:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:48,845 INFO L225 Difference]: With dead ends: 116 [2022-07-20 21:09:48,845 INFO L226 Difference]: Without dead ends: 114 [2022-07-20 21:09:48,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:09:48,847 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:48,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 375 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 389 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-07-20 21:09:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-20 21:09:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 51. [2022-07-20 21:09:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 21:09:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-07-20 21:09:48,857 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 25 [2022-07-20 21:09:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:48,857 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-07-20 21:09:48,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:09:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-07-20 21:09:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 21:09:48,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:48,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:48,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-20 21:09:49,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash 313438052, now seen corresponding path program 1 times [2022-07-20 21:09:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:49,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495938986] [2022-07-20 21:09:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:49,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:49,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:49,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:49,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:49,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495938986] [2022-07-20 21:09:49,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495938986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:49,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786336863] [2022-07-20 21:09:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:49,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:49,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:49,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:09:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:49,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:09:49,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:49,296 INFO L390 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 [2022-07-20 21:09:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:49,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:49,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:49,368 INFO L390 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 [2022-07-20 21:09:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:49,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786336863] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:49,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:49,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-20 21:09:49,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460449500] [2022-07-20 21:09:49,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 21:09:49,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:49,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 21:09:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:09:49,385 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:09:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:49,539 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-07-20 21:09:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:09:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-20 21:09:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:49,541 INFO L225 Difference]: With dead ends: 108 [2022-07-20 21:09:49,541 INFO L226 Difference]: Without dead ends: 106 [2022-07-20 21:09:49,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:09:49,542 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:49,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 200 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-20 21:09:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2022-07-20 21:09:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 21:09:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2022-07-20 21:09:49,553 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 29 [2022-07-20 21:09:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:49,553 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2022-07-20 21:09:49,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:09:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2022-07-20 21:09:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 21:09:49,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:49,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:49,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:49,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1014502630, now seen corresponding path program 1 times [2022-07-20 21:09:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:49,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900942533] [2022-07-20 21:09:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:49,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:49,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:49,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:49,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900942533] [2022-07-20 21:09:49,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900942533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:49,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622828704] [2022-07-20 21:09:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:49,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:49,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:49,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:49,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:09:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 21:09:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:50,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:09:50,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:09:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:50,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:50,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:50,179 INFO L390 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 [2022-07-20 21:09:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622828704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:50,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:50,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-20 21:09:50,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272573650] [2022-07-20 21:09:50,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:50,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:09:50,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:09:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:09:50,242 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:09:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:50,706 INFO L93 Difference]: Finished difference Result 152 states and 203 transitions. [2022-07-20 21:09:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:09:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-07-20 21:09:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:50,707 INFO L225 Difference]: With dead ends: 152 [2022-07-20 21:09:50,707 INFO L226 Difference]: Without dead ends: 150 [2022-07-20 21:09:50,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:09:50,708 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 141 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:50,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-20 21:09:50,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 57. [2022-07-20 21:09:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 21:09:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-07-20 21:09:50,718 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2022-07-20 21:09:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:50,718 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-07-20 21:09:50,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:09:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-07-20 21:09:50,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 21:09:50,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:50,719 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:50,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 21:09:50,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:50,936 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1137782566, now seen corresponding path program 2 times [2022-07-20 21:09:50,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:50,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032753811] [2022-07-20 21:09:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:50,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:51,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:51,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032753811] [2022-07-20 21:09:51,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032753811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496651156] [2022-07-20 21:09:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:09:51,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:51,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:51,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:09:51,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:09:51,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:51,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 21:09:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:51,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:09:51,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496651156] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:51,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:51,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-20 21:09:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6737077] [2022-07-20 21:09:51,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:51,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:09:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:09:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:09:51,465 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:09:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:51,669 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-07-20 21:09:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:09:51,670 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2022-07-20 21:09:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:51,671 INFO L225 Difference]: With dead ends: 104 [2022-07-20 21:09:51,671 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 21:09:51,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:09:51,672 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 238 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:51,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 96 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 21:09:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2022-07-20 21:09:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:09:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-07-20 21:09:51,684 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 33 [2022-07-20 21:09:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:51,684 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-07-20 21:09:51,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:09:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-07-20 21:09:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:09:51,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:51,686 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:51,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:51,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:51,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:51,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2068313767, now seen corresponding path program 2 times [2022-07-20 21:09:51,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:51,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627450846] [2022-07-20 21:09:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:52,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:52,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:52,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:09:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:52,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:09:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:52,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627450846] [2022-07-20 21:09:52,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627450846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812289777] [2022-07-20 21:09:52,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:09:52,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:52,072 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) [2022-07-20 21:09:52,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:09:52,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:09:52,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:09:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:52,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:09:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:52,328 INFO L390 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 [2022-07-20 21:09:52,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:52,394 INFO L390 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 [2022-07-20 21:09:52,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:09:52,444 INFO L390 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 [2022-07-20 21:09:52,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:09:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:52,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:52,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812289777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:52,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:09:52,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-20 21:09:52,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281297718] [2022-07-20 21:09:52,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:52,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:09:52,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:52,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:09:52,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:09:52,619 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 21:09:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:53,135 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-07-20 21:09:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:09:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2022-07-20 21:09:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:53,137 INFO L225 Difference]: With dead ends: 99 [2022-07-20 21:09:53,137 INFO L226 Difference]: Without dead ends: 97 [2022-07-20 21:09:53,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:09:53,138 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:53,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 336 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 393 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-07-20 21:09:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-20 21:09:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2022-07-20 21:09:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 21:09:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-20 21:09:53,151 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 39 [2022-07-20 21:09:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:53,151 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-20 21:09:53,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 21:09:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-20 21:09:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 21:09:53,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:53,152 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:53,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:53,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:53,353 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash 513618191, now seen corresponding path program 3 times [2022-07-20 21:09:53,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:53,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711300506] [2022-07-20 21:09:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:53,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:09:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:09:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:53,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:53,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711300506] [2022-07-20 21:09:53,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711300506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:53,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548700133] [2022-07-20 21:09:53,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:09:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:53,484 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) [2022-07-20 21:09:53,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:09:53,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:09:53,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:53,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 21:09:53,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:53,573 INFO L390 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 [2022-07-20 21:09:53,594 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:09:53,595 INFO L390 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 [2022-07-20 21:09:53,646 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:09:53,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:09:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:53,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:53,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:53,704 INFO L390 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 [2022-07-20 21:09:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:53,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548700133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:53,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:53,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-07-20 21:09:53,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929728791] [2022-07-20 21:09:53,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 21:09:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:53,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 21:09:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:09:53,731 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:09:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:53,969 INFO L93 Difference]: Finished difference Result 158 states and 213 transitions. [2022-07-20 21:09:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:09:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2022-07-20 21:09:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:53,971 INFO L225 Difference]: With dead ends: 158 [2022-07-20 21:09:53,971 INFO L226 Difference]: Without dead ends: 156 [2022-07-20 21:09:53,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:09:53,972 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:53,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 254 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-20 21:09:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 79. [2022-07-20 21:09:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 21:09:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-07-20 21:09:53,983 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 47 [2022-07-20 21:09:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:53,983 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-07-20 21:09:53,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 21:09:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-07-20 21:09:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 21:09:54,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:54,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:54,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:54,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:54,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash 936320017, now seen corresponding path program 1 times [2022-07-20 21:09:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:54,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991416967] [2022-07-20 21:09:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:54,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:54,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:54,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:09:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:54,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:09:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:54,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991416967] [2022-07-20 21:09:54,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991416967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:54,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134355661] [2022-07-20 21:09:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:54,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:54,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:54,328 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) [2022-07-20 21:09:54,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:09:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 21:09:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:54,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:09:54,538 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:09:54,539 INFO L390 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 [2022-07-20 21:09:54,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:09:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:09:54,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:56,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:56,770 INFO L390 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 [2022-07-20 21:09:56,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134355661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:56,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:09:56,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-20 21:09:56,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082865023] [2022-07-20 21:09:56,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:56,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:09:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:09:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=518, Unknown=1, NotChecked=0, Total=600 [2022-07-20 21:09:56,804 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:09:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:57,526 INFO L93 Difference]: Finished difference Result 214 states and 285 transitions. [2022-07-20 21:09:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 21:09:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 47 [2022-07-20 21:09:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:57,528 INFO L225 Difference]: With dead ends: 214 [2022-07-20 21:09:57,528 INFO L226 Difference]: Without dead ends: 212 [2022-07-20 21:09:57,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=333, Invalid=1922, Unknown=1, NotChecked=0, Total=2256 [2022-07-20 21:09:57,529 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 153 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:57,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 423 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 462 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-07-20 21:09:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-20 21:09:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 101. [2022-07-20 21:09:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-20 21:09:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2022-07-20 21:09:57,543 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 47 [2022-07-20 21:09:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:57,544 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2022-07-20 21:09:57,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:09:57,544 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2022-07-20 21:09:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 21:09:57,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:57,545 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:57,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:57,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 21:09:57,762 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1147045125, now seen corresponding path program 4 times [2022-07-20 21:09:57,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:57,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518794199] [2022-07-20 21:09:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:57,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:57,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:57,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:57,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:09:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:57,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:09:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:57,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:57,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518794199] [2022-07-20 21:09:57,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518794199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917068688] [2022-07-20 21:09:57,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:09:57,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:57,921 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) [2022-07-20 21:09:57,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:09:58,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:09:58,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:09:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:58,039 INFO L390 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 [2022-07-20 21:09:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:58,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:58,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:58,245 INFO L390 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 [2022-07-20 21:09:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:58,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917068688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:58,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:58,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-20 21:09:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613561373] [2022-07-20 21:09:58,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:58,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:09:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:09:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:09:58,280 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 21:09:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:58,853 INFO L93 Difference]: Finished difference Result 319 states and 448 transitions. [2022-07-20 21:09:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 21:09:58,854 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2022-07-20 21:09:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:58,855 INFO L225 Difference]: With dead ends: 319 [2022-07-20 21:09:58,855 INFO L226 Difference]: Without dead ends: 317 [2022-07-20 21:09:58,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:09:58,856 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 104 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:58,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 440 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:09:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-20 21:09:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 187. [2022-07-20 21:09:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 148 states have internal predecessors, (197), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-20 21:09:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 263 transitions. [2022-07-20 21:09:58,880 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 263 transitions. Word has length 51 [2022-07-20 21:09:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:58,880 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 263 transitions. [2022-07-20 21:09:58,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 21:09:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 263 transitions. [2022-07-20 21:09:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 21:09:58,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:58,881 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:58,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 21:09:59,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 21:09:59,099 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash -541898617, now seen corresponding path program 1 times [2022-07-20 21:09:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:59,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414825469] [2022-07-20 21:09:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:59,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:59,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:09:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:59,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:09:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:59,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:09:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:59,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:09:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:59,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414825469] [2022-07-20 21:09:59,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414825469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150026315] [2022-07-20 21:09:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:59,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:59,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:59,253 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) [2022-07-20 21:09:59,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:09:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:59,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 21:09:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:59,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:09:59,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:09:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:09:59,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:59,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:09:59,586 INFO L390 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 [2022-07-20 21:09:59,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150026315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:59,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:09:59,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-20 21:09:59,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277575696] [2022-07-20 21:09:59,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:59,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:09:59,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:09:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:09:59,610 INFO L87 Difference]: Start difference. First operand 187 states and 263 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 21:10:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:00,342 INFO L93 Difference]: Finished difference Result 325 states and 440 transitions. [2022-07-20 21:10:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 21:10:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2022-07-20 21:10:00,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:00,357 INFO L225 Difference]: With dead ends: 325 [2022-07-20 21:10:00,357 INFO L226 Difference]: Without dead ends: 323 [2022-07-20 21:10:00,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=2331, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 21:10:00,358 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 174 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:00,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 480 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:10:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-20 21:10:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 115. [2022-07-20 21:10:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 94 states have internal predecessors, (117), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-20 21:10:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2022-07-20 21:10:00,374 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 51 [2022-07-20 21:10:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:00,375 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2022-07-20 21:10:00,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 21:10:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2022-07-20 21:10:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:10:00,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:00,376 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:00,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-20 21:10:00,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 21:10:00,593 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1086909947, now seen corresponding path program 5 times [2022-07-20 21:10:00,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:00,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268031247] [2022-07-20 21:10:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:00,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:10:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268031247] [2022-07-20 21:10:00,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268031247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:00,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372953166] [2022-07-20 21:10:00,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:10:00,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:00,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:00,813 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) [2022-07-20 21:10:00,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:10:00,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 21:10:00,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:00,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:10:00,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:10:01,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:10:01,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372953166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:01,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:01,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-20 21:10:01,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058574036] [2022-07-20 21:10:01,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:01,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 21:10:01,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 21:10:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 21:10:01,398 INFO L87 Difference]: Start difference. First operand 115 states and 147 transitions. Second operand has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-20 21:10:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:01,661 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2022-07-20 21:10:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:10:01,662 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 55 [2022-07-20 21:10:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:01,664 INFO L225 Difference]: With dead ends: 179 [2022-07-20 21:10:01,664 INFO L226 Difference]: Without dead ends: 155 [2022-07-20 21:10:01,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 21:10:01,666 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:01,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 123 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:10:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-20 21:10:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2022-07-20 21:10:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 102 states have internal predecessors, (125), 17 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-20 21:10:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2022-07-20 21:10:01,686 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 55 [2022-07-20 21:10:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:01,686 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2022-07-20 21:10:01,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-20 21:10:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2022-07-20 21:10:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 21:10:01,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:01,687 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:01,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:01,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 21:10:01,892 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1543341178, now seen corresponding path program 2 times [2022-07-20 21:10:01,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:01,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696047443] [2022-07-20 21:10:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:01,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:01,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:01,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:01,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:01,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:01,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:01,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:02,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:02,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696047443] [2022-07-20 21:10:02,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696047443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:02,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881504438] [2022-07-20 21:10:02,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:10:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:02,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:02,008 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) [2022-07-20 21:10:02,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:10:02,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:10:02,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:02,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 21:10:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:02,104 INFO L390 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 [2022-07-20 21:10:02,124 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:02,125 INFO L390 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 [2022-07-20 21:10:02,169 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:02,169 INFO L390 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 [2022-07-20 21:10:02,198 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:02,199 INFO L390 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 [2022-07-20 21:10:02,250 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:02,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:02,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:02,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-20 21:10:02,367 INFO L390 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 [2022-07-20 21:10:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:02,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881504438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:02,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:02,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 16 [2022-07-20 21:10:02,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601826575] [2022-07-20 21:10:02,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:02,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:10:02,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:02,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:10:02,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:10:02,400 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:10:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:02,686 INFO L93 Difference]: Finished difference Result 192 states and 250 transitions. [2022-07-20 21:10:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:10:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-07-20 21:10:02,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:02,688 INFO L225 Difference]: With dead ends: 192 [2022-07-20 21:10:02,688 INFO L226 Difference]: Without dead ends: 190 [2022-07-20 21:10:02,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:10:02,689 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:02,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 337 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 346 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-07-20 21:10:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-20 21:10:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2022-07-20 21:10:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 118 states have internal predecessors, (149), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-20 21:10:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-07-20 21:10:02,709 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 61 [2022-07-20 21:10:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:02,709 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-07-20 21:10:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:10:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-07-20 21:10:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 21:10:02,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:02,710 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:02,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:02,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:10:02,927 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1471762440, now seen corresponding path program 1 times [2022-07-20 21:10:02,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:02,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690626570] [2022-07-20 21:10:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:02,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:03,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:03,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690626570] [2022-07-20 21:10:03,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690626570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398814363] [2022-07-20 21:10:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:03,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:03,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:03,027 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) [2022-07-20 21:10:03,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:10:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 21:10:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:03,122 INFO L390 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 [2022-07-20 21:10:03,139 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:03,140 INFO L390 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 [2022-07-20 21:10:03,187 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:03,187 INFO L390 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 [2022-07-20 21:10:03,214 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:03,214 INFO L390 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 [2022-07-20 21:10:03,276 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:03,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:03,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:03,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-20 21:10:03,401 INFO L390 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 [2022-07-20 21:10:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:03,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398814363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:03,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:03,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 16 [2022-07-20 21:10:03,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745086602] [2022-07-20 21:10:03,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:03,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:10:03,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:03,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:10:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:10:03,431 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:10:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:03,719 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-07-20 21:10:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:10:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-07-20 21:10:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:03,720 INFO L225 Difference]: With dead ends: 213 [2022-07-20 21:10:03,720 INFO L226 Difference]: Without dead ends: 211 [2022-07-20 21:10:03,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:10:03,721 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 44 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:03,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 341 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 363 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-07-20 21:10:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-20 21:10:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 151. [2022-07-20 21:10:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 122 states have (on average 1.2704918032786885) internal successors, (155), 122 states have internal predecessors, (155), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-20 21:10:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2022-07-20 21:10:03,742 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 61 [2022-07-20 21:10:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:03,742 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2022-07-20 21:10:03,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:10:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2022-07-20 21:10:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 21:10:03,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:03,743 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:03,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-20 21:10:03,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 21:10:03,957 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:03,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1484918790, now seen corresponding path program 3 times [2022-07-20 21:10:03,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:03,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451645685] [2022-07-20 21:10:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:03,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:04,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:04,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:04,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:04,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451645685] [2022-07-20 21:10:04,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451645685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:04,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188145021] [2022-07-20 21:10:04,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:10:04,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:04,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:04,119 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) [2022-07-20 21:10:04,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:10:04,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:10:04,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:04,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:10:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:04,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:10:04,345 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:04,345 INFO L390 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 [2022-07-20 21:10:04,406 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:10:04,406 INFO L390 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 [2022-07-20 21:10:04,450 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:10:04,450 INFO L390 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 [2022-07-20 21:10:04,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:10:04,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:06,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188145021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:06,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:06,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-20 21:10:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427139432] [2022-07-20 21:10:06,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:06,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:10:06,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:06,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:10:06,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=597, Unknown=1, NotChecked=0, Total=702 [2022-07-20 21:10:06,697 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-20 21:10:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:07,291 INFO L93 Difference]: Finished difference Result 222 states and 290 transitions. [2022-07-20 21:10:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 21:10:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 61 [2022-07-20 21:10:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:07,292 INFO L225 Difference]: With dead ends: 222 [2022-07-20 21:10:07,293 INFO L226 Difference]: Without dead ends: 220 [2022-07-20 21:10:07,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=366, Invalid=2183, Unknown=1, NotChecked=0, Total=2550 [2022-07-20 21:10:07,294 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:07,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 502 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 649 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-20 21:10:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-20 21:10:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 101. [2022-07-20 21:10:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 21:10:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-07-20 21:10:07,329 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 61 [2022-07-20 21:10:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:07,330 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-07-20 21:10:07,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-20 21:10:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-07-20 21:10:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:10:07,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:07,331 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:07,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:07,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:07,548 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash -227276688, now seen corresponding path program 6 times [2022-07-20 21:10:07,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:07,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675022740] [2022-07-20 21:10:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:07,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675022740] [2022-07-20 21:10:07,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675022740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066073777] [2022-07-20 21:10:07,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:10:07,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:07,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:07,681 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:07,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:10:07,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 21:10:07,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 21:10:07,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:07,850 INFO L390 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 [2022-07-20 21:10:07,867 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:07,867 INFO L390 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 [2022-07-20 21:10:07,979 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:07,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:07,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:08,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:08,057 INFO L390 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 [2022-07-20 21:10:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:08,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066073777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:08,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:08,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-20 21:10:08,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175680016] [2022-07-20 21:10:08,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:08,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:10:08,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:10:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:10:08,100 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-20 21:10:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:09,038 INFO L93 Difference]: Finished difference Result 552 states and 806 transitions. [2022-07-20 21:10:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-20 21:10:09,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 69 [2022-07-20 21:10:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:09,041 INFO L225 Difference]: With dead ends: 552 [2022-07-20 21:10:09,041 INFO L226 Difference]: Without dead ends: 550 [2022-07-20 21:10:09,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:10:09,043 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 131 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:09,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 514 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:10:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-20 21:10:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 163. [2022-07-20 21:10:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.3046875) internal successors, (167), 128 states have internal predecessors, (167), 29 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-20 21:10:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2022-07-20 21:10:09,084 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 69 [2022-07-20 21:10:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:09,084 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2022-07-20 21:10:09,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-20 21:10:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2022-07-20 21:10:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:10:09,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:09,085 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:09,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:09,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 21:10:09,297 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:09,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1158926706, now seen corresponding path program 4 times [2022-07-20 21:10:09,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:09,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809533095] [2022-07-20 21:10:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:09,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:09,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:09,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:09,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:09,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:09,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:09,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809533095] [2022-07-20 21:10:09,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809533095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655403836] [2022-07-20 21:10:09,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:10:09,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:09,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:09,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:09,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:10:09,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:10:09,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 21:10:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:09,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:10:09,715 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:10:09,715 INFO L390 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 [2022-07-20 21:10:09,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 21:10:09,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:10,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:10,086 INFO L390 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 [2022-07-20 21:10:10,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655403836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:10,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:10,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-20 21:10:10,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668647328] [2022-07-20 21:10:10,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:10,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:10:10,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:10:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:10:10,127 INFO L87 Difference]: Start difference. First operand 163 states and 225 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-20 21:10:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:11,769 INFO L93 Difference]: Finished difference Result 697 states and 1004 transitions. [2022-07-20 21:10:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-20 21:10:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 69 [2022-07-20 21:10:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:11,773 INFO L225 Difference]: With dead ends: 697 [2022-07-20 21:10:11,773 INFO L226 Difference]: Without dead ends: 695 [2022-07-20 21:10:11,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=867, Invalid=7875, Unknown=0, NotChecked=0, Total=8742 [2022-07-20 21:10:11,775 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 332 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:11,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 813 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1515 Invalid, 0 Unknown, 115 Unchecked, 0.7s Time] [2022-07-20 21:10:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-07-20 21:10:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 196. [2022-07-20 21:10:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 152 states have (on average 1.3157894736842106) internal successors, (200), 152 states have internal predecessors, (200), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-20 21:10:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2022-07-20 21:10:11,820 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 69 [2022-07-20 21:10:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:11,821 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2022-07-20 21:10:11,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-20 21:10:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2022-07-20 21:10:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 21:10:11,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:11,822 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:11,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:12,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 21:10:12,045 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash 407421926, now seen corresponding path program 7 times [2022-07-20 21:10:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:12,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916943310] [2022-07-20 21:10:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:12,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:12,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:12,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:12,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:12,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:12,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:12,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916943310] [2022-07-20 21:10:12,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916943310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682699391] [2022-07-20 21:10:12,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:10:12,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:12,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:12,194 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:12,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:10:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:12,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 21:10:12,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:12,317 INFO L390 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 [2022-07-20 21:10:12,456 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:12,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:12,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:12,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:12,530 INFO L390 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 [2022-07-20 21:10:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:12,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682699391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:12,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:12,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-07-20 21:10:12,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999847691] [2022-07-20 21:10:12,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:10:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:10:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:10:12,581 INFO L87 Difference]: Start difference. First operand 196 states and 270 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:10:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:14,738 INFO L93 Difference]: Finished difference Result 1725 states and 2618 transitions. [2022-07-20 21:10:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-20 21:10:14,739 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), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2022-07-20 21:10:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:14,745 INFO L225 Difference]: With dead ends: 1725 [2022-07-20 21:10:14,745 INFO L226 Difference]: Without dead ends: 1723 [2022-07-20 21:10:14,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=786, Invalid=6354, Unknown=0, NotChecked=0, Total=7140 [2022-07-20 21:10:14,747 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 192 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:14,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1071 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 21:10:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-07-20 21:10:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 406. [2022-07-20 21:10:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 314 states have (on average 1.375796178343949) internal successors, (432), 314 states have internal predecessors, (432), 83 states have call successors, (83), 8 states have call predecessors, (83), 8 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-20 21:10:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 598 transitions. [2022-07-20 21:10:14,881 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 598 transitions. Word has length 73 [2022-07-20 21:10:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:14,882 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 598 transitions. [2022-07-20 21:10:14,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 21:10:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 598 transitions. [2022-07-20 21:10:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 21:10:14,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:14,885 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:14,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-20 21:10:15,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 21:10:15,100 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1964317336, now seen corresponding path program 2 times [2022-07-20 21:10:15,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:15,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046963193] [2022-07-20 21:10:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:15,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:15,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:15,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:15,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:15,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046963193] [2022-07-20 21:10:15,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046963193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391279309] [2022-07-20 21:10:15,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:10:15,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:15,267 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:15,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:10:15,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:10:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 21:10:15,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:15,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:10:15,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:15,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:15,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:15,829 INFO L390 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 [2022-07-20 21:10:15,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391279309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:15,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:15,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-07-20 21:10:15,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550143515] [2022-07-20 21:10:15,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:15,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 21:10:15,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:15,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 21:10:15,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:10:15,863 INFO L87 Difference]: Start difference. First operand 406 states and 598 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-20 21:10:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:18,392 INFO L93 Difference]: Finished difference Result 1238 states and 1848 transitions. [2022-07-20 21:10:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-20 21:10:18,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 73 [2022-07-20 21:10:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:18,396 INFO L225 Difference]: With dead ends: 1238 [2022-07-20 21:10:18,396 INFO L226 Difference]: Without dead ends: 1236 [2022-07-20 21:10:18,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2899 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1163, Invalid=8539, Unknown=0, NotChecked=0, Total=9702 [2022-07-20 21:10:18,399 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 268 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:18,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 812 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 21:10:18,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-07-20 21:10:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 218. [2022-07-20 21:10:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 174 states have (on average 1.2816091954022988) internal successors, (223), 174 states have internal predecessors, (223), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-20 21:10:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 293 transitions. [2022-07-20 21:10:18,465 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 293 transitions. Word has length 73 [2022-07-20 21:10:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:18,466 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 293 transitions. [2022-07-20 21:10:18,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-20 21:10:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 293 transitions. [2022-07-20 21:10:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 21:10:18,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:18,467 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:18,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:18,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:18,683 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2050567076, now seen corresponding path program 8 times [2022-07-20 21:10:18,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:18,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782239766] [2022-07-20 21:10:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:18,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:18,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:18,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:18,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:18,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:18,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:18,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782239766] [2022-07-20 21:10:18,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782239766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855844161] [2022-07-20 21:10:18,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:10:18,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:18,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:18,980 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:19,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:10:19,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:10:19,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 21:10:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:19,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 21:10:19,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855844161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:19,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:19,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-07-20 21:10:19,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644639103] [2022-07-20 21:10:19,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:19,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 21:10:19,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 21:10:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:10:19,780 INFO L87 Difference]: Start difference. First operand 218 states and 293 transitions. Second operand has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-20 21:10:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:20,122 INFO L93 Difference]: Finished difference Result 298 states and 400 transitions. [2022-07-20 21:10:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:10:20,122 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 77 [2022-07-20 21:10:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:20,125 INFO L225 Difference]: With dead ends: 298 [2022-07-20 21:10:20,126 INFO L226 Difference]: Without dead ends: 266 [2022-07-20 21:10:20,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=642, Invalid=1908, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 21:10:20,127 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 255 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:20,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 180 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:10:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-20 21:10:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 233. [2022-07-20 21:10:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.2634408602150538) internal successors, (235), 186 states have internal predecessors, (235), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-20 21:10:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 311 transitions. [2022-07-20 21:10:20,197 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 311 transitions. Word has length 77 [2022-07-20 21:10:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:20,197 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 311 transitions. [2022-07-20 21:10:20,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-20 21:10:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 311 transitions. [2022-07-20 21:10:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 21:10:20,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:20,198 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:20,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:20,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:20,412 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash -949126895, now seen corresponding path program 9 times [2022-07-20 21:10:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:20,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197880949] [2022-07-20 21:10:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:10:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:10:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:20,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:20,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197880949] [2022-07-20 21:10:20,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197880949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:20,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543047434] [2022-07-20 21:10:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:10:20,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:20,604 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:20,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:10:20,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:10:20,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:20,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:10:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:20,833 INFO L390 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 [2022-07-20 21:10:20,855 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:20,856 INFO L390 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 [2022-07-20 21:10:21,034 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:21,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:21,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:21,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:21,101 INFO L390 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 [2022-07-20 21:10:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543047434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:21,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:21,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 23 [2022-07-20 21:10:21,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131171115] [2022-07-20 21:10:21,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:21,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:10:21,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:10:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:10:21,165 INFO L87 Difference]: Start difference. First operand 233 states and 311 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:10:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:25,676 INFO L93 Difference]: Finished difference Result 3600 states and 5511 transitions. [2022-07-20 21:10:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-07-20 21:10:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 91 [2022-07-20 21:10:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:25,688 INFO L225 Difference]: With dead ends: 3600 [2022-07-20 21:10:25,688 INFO L226 Difference]: Without dead ends: 3598 [2022-07-20 21:10:25,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 184 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8611 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1914, Invalid=19548, Unknown=0, NotChecked=0, Total=21462 [2022-07-20 21:10:25,692 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 191 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 3987 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 4570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 3987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:25,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1516 Invalid, 4570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 3987 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 21:10:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-20 21:10:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 458. [2022-07-20 21:10:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 360 states have (on average 1.3472222222222223) internal successors, (485), 360 states have internal predecessors, (485), 89 states have call successors, (89), 8 states have call predecessors, (89), 8 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-07-20 21:10:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 663 transitions. [2022-07-20 21:10:25,876 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 663 transitions. Word has length 91 [2022-07-20 21:10:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:25,877 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 663 transitions. [2022-07-20 21:10:25,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:10:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 663 transitions. [2022-07-20 21:10:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 21:10:25,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:25,879 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:25,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-20 21:10:26,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-20 21:10:26,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash -289595373, now seen corresponding path program 5 times [2022-07-20 21:10:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872851539] [2022-07-20 21:10:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:10:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:10:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:26,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872851539] [2022-07-20 21:10:26,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872851539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:26,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012251931] [2022-07-20 21:10:26,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:10:26,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:26,297 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:26,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 21:10:26,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 21:10:26,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 21:10:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:26,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:10:26,624 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:10:26,624 INFO L390 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 [2022-07-20 21:10:26,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 21 proven. 124 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-20 21:10:26,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:29,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:29,076 INFO L390 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 [2022-07-20 21:10:29,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012251931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:29,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:29,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-20 21:10:29,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942445180] [2022-07-20 21:10:29,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:29,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:10:29,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:29,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:10:29,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1484, Unknown=1, NotChecked=0, Total=1640 [2022-07-20 21:10:29,116 INFO L87 Difference]: Start difference. First operand 458 states and 663 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-20 21:10:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:33,937 INFO L93 Difference]: Finished difference Result 1812 states and 2691 transitions. [2022-07-20 21:10:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-20 21:10:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) Word has length 91 [2022-07-20 21:10:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:33,944 INFO L225 Difference]: With dead ends: 1812 [2022-07-20 21:10:33,944 INFO L226 Difference]: Without dead ends: 1810 [2022-07-20 21:10:33,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5315 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1117, Invalid=13401, Unknown=2, NotChecked=0, Total=14520 [2022-07-20 21:10:33,945 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 390 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:33,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1259 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 2228 Invalid, 0 Unknown, 164 Unchecked, 1.0s Time] [2022-07-20 21:10:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-07-20 21:10:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 443. [2022-07-20 21:10:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 348 states have (on average 1.3333333333333333) internal successors, (464), 348 states have internal predecessors, (464), 83 states have call successors, (83), 11 states have call predecessors, (83), 11 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-20 21:10:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 630 transitions. [2022-07-20 21:10:34,093 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 630 transitions. Word has length 91 [2022-07-20 21:10:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:34,093 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 630 transitions. [2022-07-20 21:10:34,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-20 21:10:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 630 transitions. [2022-07-20 21:10:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-20 21:10:34,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:34,095 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:34,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:34,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 21:10:34,311 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:34,311 INFO L85 PathProgramCache]: Analyzing trace with hash -68748281, now seen corresponding path program 10 times [2022-07-20 21:10:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:34,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199839340] [2022-07-20 21:10:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:34,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:10:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:10:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:34,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:34,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199839340] [2022-07-20 21:10:34,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199839340] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:34,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512221284] [2022-07-20 21:10:34,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:10:34,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:34,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:34,492 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:34,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 21:10:34,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:10:34,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:34,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:10:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:34,689 INFO L390 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 [2022-07-20 21:10:34,909 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:10:34,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:10:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:34,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:35,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:35,042 INFO L390 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 [2022-07-20 21:10:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:35,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512221284] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:35,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:35,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2022-07-20 21:10:35,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515734038] [2022-07-20 21:10:35,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:35,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 21:10:35,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:35,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 21:10:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:10:35,108 INFO L87 Difference]: Start difference. First operand 443 states and 630 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 21:10:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:46,862 INFO L93 Difference]: Finished difference Result 12950 states and 20137 transitions. [2022-07-20 21:10:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2022-07-20 21:10:46,863 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 95 [2022-07-20 21:10:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:46,909 INFO L225 Difference]: With dead ends: 12950 [2022-07-20 21:10:46,909 INFO L226 Difference]: Without dead ends: 12948 [2022-07-20 21:10:46,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32066 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=66941, Unknown=0, NotChecked=0, Total=72092 [2022-07-20 21:10:46,917 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 427 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 7857 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 9250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 7857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:46,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 2732 Invalid, 9250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 7857 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 21:10:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2022-07-20 21:10:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 1173. [2022-07-20 21:10:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 904 states have (on average 1.4092920353982301) internal successors, (1274), 904 states have internal predecessors, (1274), 257 states have call successors, (257), 11 states have call predecessors, (257), 11 states have return successors, (257), 257 states have call predecessors, (257), 257 states have call successors, (257) [2022-07-20 21:10:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1788 transitions. [2022-07-20 21:10:47,550 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1788 transitions. Word has length 95 [2022-07-20 21:10:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:47,550 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1788 transitions. [2022-07-20 21:10:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 21:10:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1788 transitions. [2022-07-20 21:10:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-20 21:10:47,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:47,553 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:47,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:47,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:47,770 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:47,770 INFO L85 PathProgramCache]: Analyzing trace with hash -912753783, now seen corresponding path program 3 times [2022-07-20 21:10:47,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:47,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979250934] [2022-07-20 21:10:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:47,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:47,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:47,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:47,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:47,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:47,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:48,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:48,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:10:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:48,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:10:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:48,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:48,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979250934] [2022-07-20 21:10:48,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979250934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:48,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468833067] [2022-07-20 21:10:48,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:10:48,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:48,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:48,006 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:48,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 21:10:48,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:10:48,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 21:10:48,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:48,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:10:48,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:48,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:48,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:10:48,913 INFO L390 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 [2022-07-20 21:10:48,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468833067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:48,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:48,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2022-07-20 21:10:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928209038] [2022-07-20 21:10:48,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:48,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 21:10:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 21:10:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:10:48,957 INFO L87 Difference]: Start difference. First operand 1173 states and 1788 transitions. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-20 21:10:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:54,484 INFO L93 Difference]: Finished difference Result 4311 states and 6644 transitions. [2022-07-20 21:10:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-20 21:10:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 95 [2022-07-20 21:10:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:54,491 INFO L225 Difference]: With dead ends: 4311 [2022-07-20 21:10:54,492 INFO L226 Difference]: Without dead ends: 4309 [2022-07-20 21:10:54,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1973, Invalid=17767, Unknown=0, NotChecked=0, Total=19740 [2022-07-20 21:10:54,494 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 378 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:54,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1380 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 21:10:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2022-07-20 21:10:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 473. [2022-07-20 21:10:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 378 states have (on average 1.3095238095238095) internal successors, (495), 378 states have internal predecessors, (495), 83 states have call successors, (83), 11 states have call predecessors, (83), 11 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-20 21:10:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 661 transitions. [2022-07-20 21:10:54,731 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 661 transitions. Word has length 95 [2022-07-20 21:10:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:54,731 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 661 transitions. [2022-07-20 21:10:54,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-20 21:10:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 661 transitions. [2022-07-20 21:10:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 21:10:54,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:54,733 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:54,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:54,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:54,947 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1499687394, now seen corresponding path program 6 times [2022-07-20 21:10:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107459845] [2022-07-20 21:10:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:10:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:10:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:10:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-20 21:10:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:10:55,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107459845] [2022-07-20 21:10:55,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107459845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612093167] [2022-07-20 21:10:55,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:10:55,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:55,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:55,180 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:55,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 21:10:55,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-20 21:10:55,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:55,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:10:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:55,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:10:55,558 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:10:55,558 INFO L390 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 [2022-07-20 21:10:55,637 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:10:55,637 INFO L390 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 [2022-07-20 21:10:55,694 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:10:55,694 INFO L390 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 [2022-07-20 21:10:55,775 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:10:55,775 INFO L390 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 [2022-07-20 21:10:55,832 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:10:55,832 INFO L390 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 [2022-07-20 21:10:56,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:10:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 21:10:56,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:56,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612093167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:56,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:10:56,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-20 21:10:56,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452712019] [2022-07-20 21:10:56,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:56,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 21:10:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 21:10:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1191, Unknown=1, NotChecked=0, Total=1332 [2022-07-20 21:10:56,736 INFO L87 Difference]: Start difference. First operand 473 states and 661 transitions. Second operand has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-20 21:10:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:58,752 INFO L93 Difference]: Finished difference Result 853 states and 1173 transitions. [2022-07-20 21:10:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 21:10:58,757 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) Word has length 97 [2022-07-20 21:10:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:58,764 INFO L225 Difference]: With dead ends: 853 [2022-07-20 21:10:58,764 INFO L226 Difference]: Without dead ends: 851 [2022-07-20 21:10:58,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 134 SyntacticMatches, 12 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=694, Invalid=6787, Unknown=1, NotChecked=0, Total=7482 [2022-07-20 21:10:58,772 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 231 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:58,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 820 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1325 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2022-07-20 21:10:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-07-20 21:10:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 319. [2022-07-20 21:10:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 252 states have (on average 1.2817460317460319) internal successors, (323), 252 states have internal predecessors, (323), 53 states have call successors, (53), 13 states have call predecessors, (53), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-07-20 21:10:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 429 transitions. [2022-07-20 21:10:59,008 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 429 transitions. Word has length 97 [2022-07-20 21:10:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:59,008 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 429 transitions. [2022-07-20 21:10:59,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-20 21:10:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 429 transitions. [2022-07-20 21:10:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-20 21:10:59,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:59,011 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:59,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:59,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-20 21:10:59,223 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2124803075, now seen corresponding path program 11 times [2022-07-20 21:10:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:59,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953629933] [2022-07-20 21:10:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:59,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:10:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:10:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:10:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:10:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:10:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:10:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:10:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:10:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 99 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:10:59,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953629933] [2022-07-20 21:10:59,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953629933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100260932] [2022-07-20 21:10:59,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:10:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:59,600 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:59,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 21:10:59,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-20 21:10:59,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:10:59,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:11:00,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:11:00,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100260932] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:00,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:00,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-07-20 21:11:00,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928192438] [2022-07-20 21:11:00,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:00,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 21:11:00,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:00,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 21:11:00,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 21:11:00,617 INFO L87 Difference]: Start difference. First operand 319 states and 429 transitions. Second operand has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-20 21:11:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:01,233 INFO L93 Difference]: Finished difference Result 423 states and 569 transitions. [2022-07-20 21:11:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:11:01,233 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 99 [2022-07-20 21:11:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:01,235 INFO L225 Difference]: With dead ends: 423 [2022-07-20 21:11:01,235 INFO L226 Difference]: Without dead ends: 383 [2022-07-20 21:11:01,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=887, Invalid=2773, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 21:11:01,236 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 443 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:01,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 229 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:11:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-20 21:11:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 339. [2022-07-20 21:11:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 268 states have (on average 1.2649253731343284) internal successors, (339), 268 states have internal predecessors, (339), 57 states have call successors, (57), 13 states have call predecessors, (57), 13 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-07-20 21:11:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 453 transitions. [2022-07-20 21:11:01,504 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 453 transitions. Word has length 99 [2022-07-20 21:11:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:01,504 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 453 transitions. [2022-07-20 21:11:01,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-20 21:11:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 453 transitions. [2022-07-20 21:11:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 21:11:01,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:01,506 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:01,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 21:11:01,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-20 21:11:01,721 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1648422158, now seen corresponding path program 12 times [2022-07-20 21:11:01,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:01,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747826338] [2022-07-20 21:11:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:01,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:11:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:11:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:11:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:11:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:11:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:11:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:11:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:11:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:11:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-20 21:11:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:11:01,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:01,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747826338] [2022-07-20 21:11:01,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747826338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:01,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923812624] [2022-07-20 21:11:01,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:11:01,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:01,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:01,982 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:01,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 21:11:02,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-20 21:11:02,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:11:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:11:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:02,381 INFO L390 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 [2022-07-20 21:11:02,403 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:11:02,403 INFO L390 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 [2022-07-20 21:11:02,645 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:11:02,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:11:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:11:02,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:02,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:11:02,760 INFO L390 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 [2022-07-20 21:11:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:11:02,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923812624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:02,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:02,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 28 [2022-07-20 21:11:02,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172808310] [2022-07-20 21:11:02,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:02,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-20 21:11:02,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:02,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-20 21:11:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-07-20 21:11:02,844 INFO L87 Difference]: Start difference. First operand 339 states and 453 transitions. Second operand has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-20 21:11:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:38,230 INFO L93 Difference]: Finished difference Result 16750 states and 25950 transitions. [2022-07-20 21:11:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2022-07-20 21:11:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 113 [2022-07-20 21:11:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:38,262 INFO L225 Difference]: With dead ends: 16750 [2022-07-20 21:11:38,262 INFO L226 Difference]: Without dead ends: 16748 [2022-07-20 21:11:38,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112803 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=14055, Invalid=225555, Unknown=0, NotChecked=0, Total=239610 [2022-07-20 21:11:38,274 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 637 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 13568 mSolverCounterSat, 2664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 16232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2664 IncrementalHoareTripleChecker+Valid, 13568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:38,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 3853 Invalid, 16232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2664 Valid, 13568 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-20 21:11:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16748 states. [2022-07-20 21:11:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16748 to 735. [2022-07-20 21:11:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 572 states have (on average 1.3636363636363635) internal successors, (780), 572 states have internal predecessors, (780), 149 states have call successors, (149), 13 states have call predecessors, (149), 13 states have return successors, (149), 149 states have call predecessors, (149), 149 states have call successors, (149) [2022-07-20 21:11:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1078 transitions. [2022-07-20 21:11:39,441 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1078 transitions. Word has length 113 [2022-07-20 21:11:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:39,442 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1078 transitions. [2022-07-20 21:11:39,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-20 21:11:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1078 transitions. [2022-07-20 21:11:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 21:11:39,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:39,444 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:39,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 21:11:39,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 21:11:39,661 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -754935820, now seen corresponding path program 7 times [2022-07-20 21:11:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:39,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138530540] [2022-07-20 21:11:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:11:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:11:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:11:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:11:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:11:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:11:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:11:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:11:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:11:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-20 21:11:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:11:39,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138530540] [2022-07-20 21:11:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138530540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99725067] [2022-07-20 21:11:39,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:11:39,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:39,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:39,935 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:39,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 21:11:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 21:11:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:40,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:11:40,386 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:11:40,387 INFO L390 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 [2022-07-20 21:11:40,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:11:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 27 proven. 213 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:11:40,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:42,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:11:42,868 INFO L390 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 [2022-07-20 21:11:42,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99725067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:42,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:11:42,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-07-20 21:11:42,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54983505] [2022-07-20 21:11:42,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:42,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:11:42,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:11:42,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2162, Unknown=1, NotChecked=0, Total=2352 [2022-07-20 21:11:42,906 INFO L87 Difference]: Start difference. First operand 735 states and 1078 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-20 21:11:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:48,753 INFO L93 Difference]: Finished difference Result 1648 states and 2405 transitions. [2022-07-20 21:11:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-20 21:11:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 113 [2022-07-20 21:11:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:48,756 INFO L225 Difference]: With dead ends: 1648 [2022-07-20 21:11:48,756 INFO L226 Difference]: Without dead ends: 1646 [2022-07-20 21:11:48,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5553 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1026, Invalid=14472, Unknown=2, NotChecked=0, Total=15500 [2022-07-20 21:11:48,758 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 323 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:48,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1492 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 2441 Invalid, 0 Unknown, 163 Unchecked, 0.9s Time] [2022-07-20 21:11:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-20 21:11:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 531. [2022-07-20 21:11:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 412 states have (on average 1.3009708737864079) internal successors, (536), 420 states have internal predecessors, (536), 101 states have call successors, (101), 17 states have call predecessors, (101), 17 states have return successors, (101), 93 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-20 21:11:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 738 transitions. [2022-07-20 21:11:49,321 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 738 transitions. Word has length 113 [2022-07-20 21:11:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:49,321 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 738 transitions. [2022-07-20 21:11:49,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-20 21:11:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 738 transitions. [2022-07-20 21:11:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-20 21:11:49,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:49,323 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:49,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 21:11:49,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 21:11:49,535 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1171866264, now seen corresponding path program 13 times [2022-07-20 21:11:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:49,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936615842] [2022-07-20 21:11:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:11:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:11:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:11:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:11:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:11:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:11:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:11:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:11:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:11:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-20 21:11:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:11:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936615842] [2022-07-20 21:11:49,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936615842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:49,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851421456] [2022-07-20 21:11:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:11:49,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:49,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:49,786 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:49,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 21:11:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:49,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:11:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:49,978 INFO L390 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 [2022-07-20 21:11:50,260 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:11:50,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-20 21:11:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:11:50,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:50,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:11:50,368 INFO L390 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 [2022-07-20 21:11:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:11:50,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851421456] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:50,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:50,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-07-20 21:11:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113551845] [2022-07-20 21:11:50,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:50,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 21:11:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 21:11:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:11:50,459 INFO L87 Difference]: Start difference. First operand 531 states and 738 transitions. Second operand has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 21:13:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:57,191 INFO L93 Difference]: Finished difference Result 60525 states and 94471 transitions. [2022-07-20 21:13:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 924 states. [2022-07-20 21:13:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 117 [2022-07-20 21:13:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:57,357 INFO L225 Difference]: With dead ends: 60525 [2022-07-20 21:13:57,357 INFO L226 Difference]: Without dead ends: 60523 [2022-07-20 21:13:57,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 237 SyntacticMatches, 7 SemanticMatches, 930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424502 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=39010, Invalid=828682, Unknown=0, NotChecked=0, Total=867692 [2022-07-20 21:13:57,412 INFO L413 NwaCegarLoop]: 1292 mSDtfsCounter, 1145 mSDsluCounter, 5911 mSDsCounter, 0 mSdLazyCounter, 28946 mSolverCounterSat, 5780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 7203 SdHoareTripleChecker+Invalid, 34726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5780 IncrementalHoareTripleChecker+Valid, 28946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:57,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 7203 Invalid, 34726 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5780 Valid, 28946 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-07-20 21:13:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60523 states. [2022-07-20 21:14:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60523 to 1699. [2022-07-20 21:14:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1304 states have (on average 1.4125766871165644) internal successors, (1842), 1304 states have internal predecessors, (1842), 377 states have call successors, (377), 17 states have call predecessors, (377), 17 states have return successors, (377), 377 states have call predecessors, (377), 377 states have call successors, (377) [2022-07-20 21:14:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2596 transitions. [2022-07-20 21:14:01,553 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2596 transitions. Word has length 117 [2022-07-20 21:14:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:01,554 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2596 transitions. [2022-07-20 21:14:01,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-20 21:14:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2596 transitions. [2022-07-20 21:14:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-20 21:14:01,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:01,566 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:01,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-20 21:14:01,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 21:14:01,779 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2069259542, now seen corresponding path program 4 times [2022-07-20 21:14:01,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:01,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828081395] [2022-07-20 21:14:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:01,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:01,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 21:14:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:14:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:14:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:14:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 21:14:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:14:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:14:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:14:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:14:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-20 21:14:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:14:02,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:02,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828081395] [2022-07-20 21:14:02,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828081395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:02,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278743296] [2022-07-20 21:14:02,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:14:02,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:02,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:02,013 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:14:02,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 21:14:02,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:14:02,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 21:14:02,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:02,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:14:02,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:14:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 21:14:02,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:02,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:14:02,854 INFO L390 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 [2022-07-20 21:14:02,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278743296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:02,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:14:02,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-07-20 21:14:02,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462323852] [2022-07-20 21:14:02,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:02,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:14:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:02,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:14:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 21:14:02,906 INFO L87 Difference]: Start difference. First operand 1699 states and 2596 transitions. Second operand has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20)