./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mlceu.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/mlceu.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 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:08:31,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:08:31,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:08:31,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:08:31,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:08:31,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:08:31,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:08:31,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:08:31,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:08:31,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:08:31,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:08:31,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:08:31,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:08:31,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:08:31,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:08:31,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:08:31,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:08:31,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:08:31,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:08:31,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:08:31,107 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:08:31,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:08:31,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:08:31,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:08:31,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:08:31,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:08:31,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:08:31,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:08:31,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:08:31,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:08:31,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:08:31,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:08:31,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:08:31,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:08:31,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:08:31,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:08:31,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:08:31,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:08:31,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:08:31,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:08:31,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:08:31,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:08:31,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:08:31,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:08:31,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:08:31,149 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:08:31,149 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:08:31,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:08:31,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:08:31,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:08:31,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:08:31,151 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:08:31,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:08:31,152 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:08:31,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:08:31,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:08:31,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:08:31,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:08:31,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:08:31,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:08:31,153 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:08:31,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:08:31,153 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:08:31,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:08:31,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:08:31,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:08:31,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:08:31,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:08:31,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:08:31,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:08:31,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:08:31,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:08:31,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:08:31,155 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:08:31,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:08:31,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:08:31,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2022-07-20 21:08:31,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:08:31,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:08:31,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:08:31,380 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:08:31,380 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:08:31,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu.c [2022-07-20 21:08:31,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2cde7443/8e683e9a01c9437e88689b10674c3bd7/FLAG6d894d935 [2022-07-20 21:08:31,812 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:08:31,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c [2022-07-20 21:08:31,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2cde7443/8e683e9a01c9437e88689b10674c3bd7/FLAG6d894d935 [2022-07-20 21:08:31,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2cde7443/8e683e9a01c9437e88689b10674c3bd7 [2022-07-20 21:08:31,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:08:31,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:08:31,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:08:31,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:08:31,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:08:31,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:08:31" (1/1) ... [2022-07-20 21:08:31,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d5d10f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:31, skipping insertion in model container [2022-07-20 21:08:31,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:08:31" (1/1) ... [2022-07-20 21:08:31,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:08:31,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:08:32,020 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/mlceu.c[396,409] [2022-07-20 21:08:32,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:08:32,042 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:08:32,052 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/mlceu.c[396,409] [2022-07-20 21:08:32,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:08:32,076 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:08:32,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32 WrapperNode [2022-07-20 21:08:32,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:08:32,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:08:32,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:08:32,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:08:32,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,104 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2022-07-20 21:08:32,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:08:32,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:08:32,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:08:32,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:08:32,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:08:32,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:08:32,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:08:32,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:08:32,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (1/1) ... [2022-07-20 21:08:32,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:08:32,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:32,161 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 21:08:32,179 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 21:08:32,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:08:32,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:08:32,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:08:32,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 21:08:32,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:08:32,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:08:32,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:08:32,236 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:08:32,237 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:08:32,328 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:08:32,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:08:32,332 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:08:32,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:08:32 BoogieIcfgContainer [2022-07-20 21:08:32,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:08:32,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:08:32,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:08:32,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:08:32,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:08:31" (1/3) ... [2022-07-20 21:08:32,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b49385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:08:32, skipping insertion in model container [2022-07-20 21:08:32,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:32" (2/3) ... [2022-07-20 21:08:32,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b49385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:08:32, skipping insertion in model container [2022-07-20 21:08:32,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:08:32" (3/3) ... [2022-07-20 21:08:32,339 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu.c [2022-07-20 21:08:32,348 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:08:32,349 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:08:32,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:08:32,389 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@3fb23531, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@22c5d050 [2022-07-20 21:08:32,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:08:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 21:08:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 21:08:32,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:32,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:32,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1096717866, now seen corresponding path program 1 times [2022-07-20 21:08:32,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:32,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41349349] [2022-07-20 21:08:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:32,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:32,493 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 21:08:32,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:32,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41349349] [2022-07-20 21:08:32,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41349349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:08:32,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:08:32,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:08:32,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995528501] [2022-07-20 21:08:32,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:08:32,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:08:32,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:08:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:08:32,517 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 21:08:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:32,539 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-07-20 21:08:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:08:32,541 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2022-07-20 21:08:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:32,545 INFO L225 Difference]: With dead ends: 34 [2022-07-20 21:08:32,545 INFO L226 Difference]: Without dead ends: 15 [2022-07-20 21:08:32,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:08:32,549 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:32,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:08:32,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-20 21:08:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-20 21:08:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 21:08:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-20 21:08:32,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2022-07-20 21:08:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:32,585 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-20 21:08:32,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 21:08:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-20 21:08:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 21:08:32,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:32,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:32,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:08:32,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash 678289496, now seen corresponding path program 1 times [2022-07-20 21:08:32,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:32,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798320795] [2022-07-20 21:08:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:32,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:32,680 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 21:08:32,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798320795] [2022-07-20 21:08:32,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798320795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:08:32,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:08:32,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:08:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499503412] [2022-07-20 21:08:32,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:08:32,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:08:32,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:08:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:08:32,684 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 21:08:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:32,719 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-07-20 21:08:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:08:32,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2022-07-20 21:08:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:32,720 INFO L225 Difference]: With dead ends: 34 [2022-07-20 21:08:32,720 INFO L226 Difference]: Without dead ends: 24 [2022-07-20 21:08:32,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:08:32,722 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:32,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:08:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-20 21:08:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-07-20 21:08:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 21:08:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-20 21:08:32,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2022-07-20 21:08:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:32,726 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-20 21:08:32,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 21:08:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-20 21:08:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 21:08:32,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:32,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:32,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:08:32,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1190752748, now seen corresponding path program 1 times [2022-07-20 21:08:32,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:32,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311254464] [2022-07-20 21:08:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:32,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:32,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311254464] [2022-07-20 21:08:32,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311254464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:32,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707746246] [2022-07-20 21:08:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:32,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:32,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:32,874 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 21:08:32,875 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 21:08:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:32,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 21:08:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:32,965 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 18 treesize of output 14 [2022-07-20 21:08:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:33,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:33,035 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 14 treesize of output 12 [2022-07-20 21:08:33,038 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 22 treesize of output 20 [2022-07-20 21:08:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:33,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707746246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:33,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:33,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-20 21:08:33,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451847335] [2022-07-20 21:08:33,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:33,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 21:08:33,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 21:08:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:08:33,051 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 21:08:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:33,114 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-07-20 21:08:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 21:08:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 13 [2022-07-20 21:08:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:33,115 INFO L225 Difference]: With dead ends: 26 [2022-07-20 21:08:33,115 INFO L226 Difference]: Without dead ends: 24 [2022-07-20 21:08:33,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:08:33,116 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:33,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:08:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-20 21:08:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-07-20 21:08:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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 21:08:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-20 21:08:33,120 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2022-07-20 21:08:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:33,120 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-20 21:08:33,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 21:08:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-20 21:08:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 21:08:33,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:33,121 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:33,141 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 21:08:33,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:33,339 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:33,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1891500962, now seen corresponding path program 1 times [2022-07-20 21:08:33,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:33,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688560096] [2022-07-20 21:08:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:33,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:33,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688560096] [2022-07-20 21:08:33,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688560096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686058938] [2022-07-20 21:08:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:33,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:33,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:33,408 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 21:08:33,409 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 21:08:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:08:33,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:33,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:33,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686058938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:33,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:33,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-20 21:08:33,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052236336] [2022-07-20 21:08:33,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:33,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 21:08:33,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 21:08:33,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 21:08:33,538 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 21:08:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:33,592 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-20 21:08:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 21:08:33,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 17 [2022-07-20 21:08:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:33,593 INFO L225 Difference]: With dead ends: 49 [2022-07-20 21:08:33,593 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 21:08:33,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:08:33,597 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:33,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:08:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 21:08:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-07-20 21:08:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 21:08:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-20 21:08:33,605 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-07-20 21:08:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:33,605 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-20 21:08:33,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 21:08:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-20 21:08:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 21:08:33,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:33,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:33,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-20 21:08:33,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-20 21:08:33,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2006236274, now seen corresponding path program 2 times [2022-07-20 21:08:33,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:33,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284489816] [2022-07-20 21:08:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:33,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284489816] [2022-07-20 21:08:33,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284489816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584297530] [2022-07-20 21:08:33,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:08:33,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:33,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:33,950 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 21:08:33,951 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 21:08:33,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:08:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:33,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 21:08:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:34,014 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 15 treesize of output 11 [2022-07-20 21:08:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:34,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:34,113 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 16 treesize of output 14 [2022-07-20 21:08:34,116 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 24 [2022-07-20 21:08:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:34,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584297530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:34,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:34,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-07-20 21:08:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696093601] [2022-07-20 21:08:34,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:34,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 21:08:34,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 21:08:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-20 21:08:34,130 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 21:08:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:34,239 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-07-20 21:08:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:08:34,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 20 [2022-07-20 21:08:34,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:34,240 INFO L225 Difference]: With dead ends: 33 [2022-07-20 21:08:34,240 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 21:08:34,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:08:34,241 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:34,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:08:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 21:08:34,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-07-20 21:08:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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 21:08:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-07-20 21:08:34,244 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2022-07-20 21:08:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:34,245 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-07-20 21:08:34,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 21:08:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-07-20 21:08:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 21:08:34,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:34,246 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:34,269 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 21:08:34,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:34,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:34,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:34,460 INFO L85 PathProgramCache]: Analyzing trace with hash 466236484, now seen corresponding path program 3 times [2022-07-20 21:08:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:34,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400322548] [2022-07-20 21:08:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:34,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:34,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400322548] [2022-07-20 21:08:34,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400322548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:34,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271977681] [2022-07-20 21:08:34,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:08:34,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:34,533 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 21:08:34,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:08:34,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:08:34,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:34,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:08:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:34,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:34,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271977681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:34,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:34,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 21:08:34,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421508627] [2022-07-20 21:08:34,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:34,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:08:34,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:08:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:08:34,659 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 21:08:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:34,731 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-07-20 21:08:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:08:34,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 24 [2022-07-20 21:08:34,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:34,732 INFO L225 Difference]: With dead ends: 64 [2022-07-20 21:08:34,732 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 21:08:34,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:08:34,734 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:34,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:08:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 21:08:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-07-20 21:08:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 21:08:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-20 21:08:34,740 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-07-20 21:08:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:34,740 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-20 21:08:34,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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 21:08:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-20 21:08:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 21:08:34,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:34,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:34,760 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 21:08:34,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:34,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1524796712, now seen corresponding path program 4 times [2022-07-20 21:08:34,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:34,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603335161] [2022-07-20 21:08:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:35,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:35,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603335161] [2022-07-20 21:08:35,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603335161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:35,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398645764] [2022-07-20 21:08:35,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:08:35,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:35,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:35,130 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 21:08:35,131 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 21:08:35,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:08:35,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 21:08:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:35,203 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 21:08:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:35,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:35,325 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 16 treesize of output 14 [2022-07-20 21:08:35,326 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 24 [2022-07-20 21:08:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:35,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398645764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:35,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:35,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-20 21:08:35,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318058656] [2022-07-20 21:08:35,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:35,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 21:08:35,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:35,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 21:08:35,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:08:35,344 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 21:08:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:35,528 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-20 21:08:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 21:08:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 21:08:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:35,529 INFO L225 Difference]: With dead ends: 40 [2022-07-20 21:08:35,529 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 21:08:35,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:08:35,532 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:35,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 101 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:08:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 21:08:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-07-20 21:08:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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 21:08:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-20 21:08:35,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2022-07-20 21:08:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:35,536 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-20 21:08:35,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 21:08:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-20 21:08:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:08:35,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:35,537 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:35,554 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 21:08:35,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:35,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash 702525070, now seen corresponding path program 5 times [2022-07-20 21:08:35,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:35,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323407249] [2022-07-20 21:08:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:35,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:35,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:35,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323407249] [2022-07-20 21:08:35,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323407249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:35,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087874673] [2022-07-20 21:08:35,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:08:35,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:35,832 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 21:08:35,834 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 21:08:35,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 21:08:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:08:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:35,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:36,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087874673] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:36,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:36,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-20 21:08:36,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413626190] [2022-07-20 21:08:36,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:08:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:08:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:08:36,031 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 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 21:08:36,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:36,115 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-07-20 21:08:36,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:08:36,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 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 31 [2022-07-20 21:08:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:36,117 INFO L225 Difference]: With dead ends: 79 [2022-07-20 21:08:36,117 INFO L226 Difference]: Without dead ends: 45 [2022-07-20 21:08:36,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:08:36,118 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:36,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 63 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:08:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-20 21:08:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-07-20 21:08:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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 21:08:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-20 21:08:36,126 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2022-07-20 21:08:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:36,126 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-20 21:08:36,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 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 21:08:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-20 21:08:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 21:08:36,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:36,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:36,145 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 21:08:36,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:36,344 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1539792518, now seen corresponding path program 6 times [2022-07-20 21:08:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:36,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517907439] [2022-07-20 21:08:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:36,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:36,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517907439] [2022-07-20 21:08:36,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517907439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797171281] [2022-07-20 21:08:36,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:08:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:36,497 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 21:08:36,498 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 21:08:36,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 21:08:36,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:08:36,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:36,579 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 21:08:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:36,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:36,775 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 16 treesize of output 14 [2022-07-20 21:08:36,782 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 24 [2022-07-20 21:08:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:36,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797171281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:36,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:36,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-07-20 21:08:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590438502] [2022-07-20 21:08:36,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:08:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:08:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:08:36,813 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 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 21:08:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:37,101 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-20 21:08:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:08:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 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 34 [2022-07-20 21:08:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:37,103 INFO L225 Difference]: With dead ends: 47 [2022-07-20 21:08:37,103 INFO L226 Difference]: Without dead ends: 45 [2022-07-20 21:08:37,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:08:37,106 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:37,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 146 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:08:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-20 21:08:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-07-20 21:08:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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 21:08:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-20 21:08:37,116 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2022-07-20 21:08:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:37,116 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-20 21:08:37,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 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 21:08:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-20 21:08:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 21:08:37,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:37,118 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:37,137 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 21:08:37,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:37,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1264665552, now seen corresponding path program 7 times [2022-07-20 21:08:37,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:37,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36764941] [2022-07-20 21:08:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:37,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:37,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36764941] [2022-07-20 21:08:37,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36764941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:37,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769039922] [2022-07-20 21:08:37,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:08:37,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:37,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:37,406 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 21:08:37,407 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 21:08:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:37,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:08:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:37,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:37,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769039922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:37,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:37,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-20 21:08:37,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942251133] [2022-07-20 21:08:37,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:37,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:08:37,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:37,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:08:37,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:08:37,605 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 21:08:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:37,723 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-07-20 21:08:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:08:37,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 38 [2022-07-20 21:08:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:37,724 INFO L225 Difference]: With dead ends: 94 [2022-07-20 21:08:37,724 INFO L226 Difference]: Without dead ends: 52 [2022-07-20 21:08:37,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:08:37,725 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:37,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 106 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:08:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-20 21:08:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2022-07-20 21:08:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 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 21:08:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-07-20 21:08:37,728 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-07-20 21:08:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:37,728 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-07-20 21:08:37,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 21:08:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-07-20 21:08:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 21:08:37,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:37,729 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:37,748 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 21:08:37,938 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,SelfDestructingSolverStorable9 [2022-07-20 21:08:37,938 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:37,939 INFO L85 PathProgramCache]: Analyzing trace with hash 122087364, now seen corresponding path program 8 times [2022-07-20 21:08:37,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:37,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242328223] [2022-07-20 21:08:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:37,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:38,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242328223] [2022-07-20 21:08:38,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242328223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103631532] [2022-07-20 21:08:38,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:08:38,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:38,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:38,075 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 21:08:38,076 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 21:08:38,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:08:38,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:38,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 21:08:38,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:38,152 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 15 treesize of output 11 [2022-07-20 21:08:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:38,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:38,307 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 16 treesize of output 14 [2022-07-20 21:08:38,309 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 24 [2022-07-20 21:08:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:38,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103631532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:38,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:38,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 20 [2022-07-20 21:08:38,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125705939] [2022-07-20 21:08:38,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:38,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:08:38,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:08:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:08:38,341 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:08:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:38,634 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-07-20 21:08:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:08:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-20 21:08:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:38,635 INFO L225 Difference]: With dead ends: 54 [2022-07-20 21:08:38,635 INFO L226 Difference]: Without dead ends: 52 [2022-07-20 21:08:38,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:08:38,636 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:38,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:08:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-20 21:08:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-07-20 21:08:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:08:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-07-20 21:08:38,640 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2022-07-20 21:08:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:38,640 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-07-20 21:08:38,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:08:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-07-20 21:08:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 21:08:38,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:38,641 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:38,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:08:38,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:38,855 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1087582854, now seen corresponding path program 9 times [2022-07-20 21:08:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:38,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63755418] [2022-07-20 21:08:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:38,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:38,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63755418] [2022-07-20 21:08:38,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63755418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231416881] [2022-07-20 21:08:38,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:08:38,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:38,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:38,946 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 21:08:38,948 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 21:08:39,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 21:08:39,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:08:39,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:39,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:39,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231416881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:39,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:39,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-20 21:08:39,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671468881] [2022-07-20 21:08:39,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:08:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:08:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:08:39,219 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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 21:08:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:39,336 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2022-07-20 21:08:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:08:39,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-20 21:08:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:39,337 INFO L225 Difference]: With dead ends: 109 [2022-07-20 21:08:39,337 INFO L226 Difference]: Without dead ends: 59 [2022-07-20 21:08:39,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:08:39,338 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:39,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 106 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:08:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-20 21:08:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-07-20 21:08:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:08:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-07-20 21:08:39,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2022-07-20 21:08:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:39,342 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-07-20 21:08:39,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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 21:08:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-07-20 21:08:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:08:39,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:39,343 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:39,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:08:39,555 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,SelfDestructingSolverStorable11 [2022-07-20 21:08:39,555 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:39,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2143538330, now seen corresponding path program 10 times [2022-07-20 21:08:39,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:39,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493075554] [2022-07-20 21:08:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:39,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:39,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:39,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493075554] [2022-07-20 21:08:39,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493075554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:39,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087689754] [2022-07-20 21:08:39,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:08:39,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:39,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:39,720 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 21:08:39,721 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 21:08:39,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:08:39,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:39,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 21:08:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:39,812 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 15 treesize of output 11 [2022-07-20 21:08:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:39,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:40,036 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 16 treesize of output 14 [2022-07-20 21:08:40,037 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 24 [2022-07-20 21:08:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:40,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087689754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:40,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:40,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2022-07-20 21:08:40,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59835198] [2022-07-20 21:08:40,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:40,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:08:40,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:40,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:08:40,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:08:40,089 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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 21:08:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:40,484 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-07-20 21:08:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 21:08:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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 48 [2022-07-20 21:08:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:40,485 INFO L225 Difference]: With dead ends: 61 [2022-07-20 21:08:40,485 INFO L226 Difference]: Without dead ends: 59 [2022-07-20 21:08:40,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:08:40,486 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:40,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 240 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:08:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-20 21:08:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-07-20 21:08:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 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 21:08:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-07-20 21:08:40,489 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2022-07-20 21:08:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:40,490 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-07-20 21:08:40,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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 21:08:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-07-20 21:08:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 21:08:40,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:40,491 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:40,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 21:08:40,699 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,SelfDestructingSolverStorable12 [2022-07-20 21:08:40,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash -546342884, now seen corresponding path program 11 times [2022-07-20 21:08:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:40,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228708692] [2022-07-20 21:08:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:40,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228708692] [2022-07-20 21:08:40,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228708692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609571136] [2022-07-20 21:08:40,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:08:40,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:40,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:40,794 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 21:08:40,794 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 21:08:40,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 21:08:40,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:40,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:08:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:41,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:41,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609571136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:41,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:41,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-20 21:08:41,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181583421] [2022-07-20 21:08:41,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:41,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:08:41,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:41,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:08:41,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:08:41,077 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 21:08:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:41,229 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-07-20 21:08:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:08:41,230 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 52 [2022-07-20 21:08:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:41,230 INFO L225 Difference]: With dead ends: 124 [2022-07-20 21:08:41,230 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 21:08:41,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:08:41,231 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:41,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 124 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:08:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 21:08:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-07-20 21:08:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 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 21:08:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-07-20 21:08:41,235 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2022-07-20 21:08:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:41,236 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-07-20 21:08:41,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 21:08:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-07-20 21:08:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:08:41,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:41,236 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:41,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-20 21:08:41,445 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,SelfDestructingSolverStorable13 [2022-07-20 21:08:41,446 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash 969527472, now seen corresponding path program 12 times [2022-07-20 21:08:41,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:41,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519299992] [2022-07-20 21:08:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:41,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:41,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:41,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519299992] [2022-07-20 21:08:41,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519299992] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:41,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217422360] [2022-07-20 21:08:41,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:08:41,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:41,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:41,625 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 21:08:41,626 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 21:08:41,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 21:08:41,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:41,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:08:41,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:41,913 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 15 treesize of output 11 [2022-07-20 21:08:42,389 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:08:42,389 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 44 treesize of output 23 [2022-07-20 21:08:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:42,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:42,888 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 21:08:42,890 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 28 [2022-07-20 21:08:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:42,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217422360] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:42,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:42,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2022-07-20 21:08:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895467063] [2022-07-20 21:08:42,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:08:42,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:42,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:08:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:08:42,913 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 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 21:08:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:43,584 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-07-20 21:08:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 21:08:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 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 55 [2022-07-20 21:08:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:43,585 INFO L225 Difference]: With dead ends: 92 [2022-07-20 21:08:43,585 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 21:08:43,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=671, Invalid=5029, Unknown=0, NotChecked=0, Total=5700 [2022-07-20 21:08:43,587 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:43,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 304 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 269 Invalid, 0 Unknown, 166 Unchecked, 0.1s Time] [2022-07-20 21:08:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 21:08:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-07-20 21:08:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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 21:08:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-07-20 21:08:43,591 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2022-07-20 21:08:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:43,591 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-07-20 21:08:43,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 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 21:08:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-07-20 21:08:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 21:08:43,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:43,592 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:43,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:08:43,799 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,SelfDestructingSolverStorable14 [2022-07-20 21:08:43,799 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2019414246, now seen corresponding path program 1 times [2022-07-20 21:08:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:43,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918959192] [2022-07-20 21:08:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:08:43,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:43,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918959192] [2022-07-20 21:08:43,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918959192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:43,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149178700] [2022-07-20 21:08:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:43,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:43,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:43,851 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 21:08:43,853 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 21:08:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:43,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 21:08:43,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:08:43,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 21:08:44,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149178700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:44,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:44,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-20 21:08:44,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424305981] [2022-07-20 21:08:44,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:44,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:08:44,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:44,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:08:44,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:08:44,086 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 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 21:08:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:44,222 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2022-07-20 21:08:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 21:08:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 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 58 [2022-07-20 21:08:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:44,224 INFO L225 Difference]: With dead ends: 187 [2022-07-20 21:08:44,224 INFO L226 Difference]: Without dead ends: 155 [2022-07-20 21:08:44,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:08:44,225 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:44,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 80 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:08:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-20 21:08:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2022-07-20 21:08:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:08:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-07-20 21:08:44,231 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 58 [2022-07-20 21:08:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:44,232 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-07-20 21:08:44,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 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 21:08:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-07-20 21:08:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 21:08:44,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:44,232 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:44,249 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 21:08:44,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:44,447 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1317814372, now seen corresponding path program 13 times [2022-07-20 21:08:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:44,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287782807] [2022-07-20 21:08:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:44,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:44,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287782807] [2022-07-20 21:08:44,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287782807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705017326] [2022-07-20 21:08:44,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:08:44,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:44,642 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 21:08:44,642 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 21:08:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:44,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:08:44,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:44,736 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 15 treesize of output 11 [2022-07-20 21:08:44,776 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:08:44,777 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 27 treesize of output 26 [2022-07-20 21:08:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:44,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:45,072 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 16 treesize of output 14 [2022-07-20 21:08:45,077 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 24 [2022-07-20 21:08:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:45,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705017326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:45,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:45,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 29 [2022-07-20 21:08:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382894128] [2022-07-20 21:08:45,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:08:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:08:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:08:45,124 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 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 21:08:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:45,639 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2022-07-20 21:08:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-20 21:08:45,640 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 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 58 [2022-07-20 21:08:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:45,640 INFO L225 Difference]: With dead ends: 131 [2022-07-20 21:08:45,640 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 21:08:45,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 21:08:45,641 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:45,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 376 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 722 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-07-20 21:08:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 21:08:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2022-07-20 21:08:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 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 21:08:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-07-20 21:08:45,648 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 58 [2022-07-20 21:08:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:45,648 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-07-20 21:08:45,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 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 21:08:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-07-20 21:08:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 21:08:45,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:45,649 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:45,667 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 21:08:45,863 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,SelfDestructingSolverStorable16 [2022-07-20 21:08:45,863 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:45,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:45,864 INFO L85 PathProgramCache]: Analyzing trace with hash 432429360, now seen corresponding path program 14 times [2022-07-20 21:08:45,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:45,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956122483] [2022-07-20 21:08:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:45,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:46,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956122483] [2022-07-20 21:08:46,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956122483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128666559] [2022-07-20 21:08:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:08:46,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:46,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:46,098 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 21:08:46,135 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 21:08:46,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:08:46,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 21:08:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:46,214 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 15 treesize of output 11 [2022-07-20 21:08:46,241 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:08:46,242 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 25 treesize of output 24 [2022-07-20 21:08:46,270 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:08:46,271 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 25 treesize of output 24 [2022-07-20 21:08:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:46,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:46,569 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 16 treesize of output 14 [2022-07-20 21:08:46,571 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 24 [2022-07-20 21:08:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:08:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128666559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:46,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:46,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2022-07-20 21:08:46,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732776847] [2022-07-20 21:08:46,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:46,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 21:08:46,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:46,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 21:08:46,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:08:46,609 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 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 21:08:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:47,154 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2022-07-20 21:08:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 21:08:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 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 61 [2022-07-20 21:08:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:47,155 INFO L225 Difference]: With dead ends: 126 [2022-07-20 21:08:47,156 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 21:08:47,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 21:08:47,157 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:47,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 420 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 21:08:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 21:08:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2022-07-20 21:08:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 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 21:08:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-07-20 21:08:47,163 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 61 [2022-07-20 21:08:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:47,163 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-07-20 21:08:47,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 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 21:08:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-07-20 21:08:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 21:08:47,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:47,164 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:47,182 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 21:08:47,382 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,SelfDestructingSolverStorable17 [2022-07-20 21:08:47,382 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1425668434, now seen corresponding path program 15 times [2022-07-20 21:08:47,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:47,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816051779] [2022-07-20 21:08:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:47,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:47,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816051779] [2022-07-20 21:08:47,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816051779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:47,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100918524] [2022-07-20 21:08:47,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:08:47,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:47,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:47,588 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 21:08:47,589 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 21:08:47,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 21:08:47,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 21:08:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:47,848 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 15 treesize of output 11 [2022-07-20 21:08:48,330 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:08:48,331 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 44 treesize of output 23 [2022-07-20 21:08:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:48,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:48,903 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 21:08:48,905 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 28 [2022-07-20 21:08:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:48,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100918524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:48,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:48,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-07-20 21:08:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474094075] [2022-07-20 21:08:48,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:48,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 21:08:48,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:48,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 21:08:48,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 21:08:48,945 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 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 21:08:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:49,717 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2022-07-20 21:08:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 21:08:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 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 62 [2022-07-20 21:08:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:49,718 INFO L225 Difference]: With dead ends: 125 [2022-07-20 21:08:49,718 INFO L226 Difference]: Without dead ends: 89 [2022-07-20 21:08:49,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=6191, Unknown=0, NotChecked=0, Total=6972 [2022-07-20 21:08:49,719 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:49,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 383 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 300 Invalid, 0 Unknown, 279 Unchecked, 0.1s Time] [2022-07-20 21:08:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-20 21:08:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-07-20 21:08:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 87 states have internal predecessors, (97), 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 21:08:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-07-20 21:08:49,726 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 62 [2022-07-20 21:08:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:49,726 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-07-20 21:08:49,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 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 21:08:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-07-20 21:08:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 21:08:49,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:49,727 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:49,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 21:08:49,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:49,937 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1199724314, now seen corresponding path program 16 times [2022-07-20 21:08:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374774832] [2022-07-20 21:08:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:50,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374774832] [2022-07-20 21:08:50,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374774832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772166138] [2022-07-20 21:08:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:08:50,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:50,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:50,185 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 21:08:50,187 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 21:08:50,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:08:50,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 21:08:50,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:50,299 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 15 treesize of output 11 [2022-07-20 21:08:50,343 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:08:50,343 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 27 treesize of output 26 [2022-07-20 21:08:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:50,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:50,684 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 16 treesize of output 14 [2022-07-20 21:08:50,686 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 24 [2022-07-20 21:08:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:50,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772166138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:50,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:50,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 32 [2022-07-20 21:08:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758958432] [2022-07-20 21:08:50,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:08:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:08:50,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:08:50,735 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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 21:08:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:51,349 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2022-07-20 21:08:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-20 21:08:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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 65 [2022-07-20 21:08:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:51,350 INFO L225 Difference]: With dead ends: 139 [2022-07-20 21:08:51,350 INFO L226 Difference]: Without dead ends: 137 [2022-07-20 21:08:51,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 113 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=3155, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 21:08:51,351 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 112 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:51,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 485 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 936 Invalid, 0 Unknown, 5 Unchecked, 0.3s Time] [2022-07-20 21:08:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-20 21:08:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2022-07-20 21:08:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.108695652173913) internal successors, (102), 92 states have internal predecessors, (102), 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 21:08:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2022-07-20 21:08:51,358 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 65 [2022-07-20 21:08:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:51,359 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2022-07-20 21:08:51,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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 21:08:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2022-07-20 21:08:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 21:08:51,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:51,359 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:51,377 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 21:08:51,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:51,570 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1374347474, now seen corresponding path program 17 times [2022-07-20 21:08:51,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:51,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135386902] [2022-07-20 21:08:51,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:51,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:51,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:51,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135386902] [2022-07-20 21:08:51,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135386902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:51,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810924613] [2022-07-20 21:08:51,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:08:51,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:51,806 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 21:08:51,807 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 21:08:51,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-20 21:08:51,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:51,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 21:08:51,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:52,015 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 15 treesize of output 11 [2022-07-20 21:08:52,059 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:08:52,059 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 25 treesize of output 24 [2022-07-20 21:08:52,098 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:08:52,098 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 25 treesize of output 24 [2022-07-20 21:08:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:52,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:52,472 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 16 treesize of output 14 [2022-07-20 21:08:52,474 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 24 [2022-07-20 21:08:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:08:52,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810924613] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:52,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:52,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2022-07-20 21:08:52,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347430014] [2022-07-20 21:08:52,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:52,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 21:08:52,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:52,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 21:08:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:08:52,521 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 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 21:08:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:53,137 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2022-07-20 21:08:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 21:08:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 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 68 [2022-07-20 21:08:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:53,138 INFO L225 Difference]: With dead ends: 134 [2022-07-20 21:08:53,138 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 21:08:53,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:08:53,139 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:53,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 535 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 21:08:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 21:08:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2022-07-20 21:08:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 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 21:08:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-07-20 21:08:53,148 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 68 [2022-07-20 21:08:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:53,148 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-07-20 21:08:53,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 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 21:08:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-07-20 21:08:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:08:53,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:53,148 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:53,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-20 21:08:53,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:53,349 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2030424676, now seen corresponding path program 18 times [2022-07-20 21:08:53,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:53,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272002857] [2022-07-20 21:08:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:53,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:53,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:53,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272002857] [2022-07-20 21:08:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272002857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635164929] [2022-07-20 21:08:53,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:08:53,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:53,618 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 21:08:53,621 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 21:08:54,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-20 21:08:54,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:54,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:08:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:54,318 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 15 treesize of output 11 [2022-07-20 21:08:54,894 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:08:54,894 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 44 treesize of output 23 [2022-07-20 21:08:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:54,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:55,970 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 21:08:55,972 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 28 [2022-07-20 21:08:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:55,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635164929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:55,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:55,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2022-07-20 21:08:55,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305395553] [2022-07-20 21:08:55,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:55,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-20 21:08:55,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-20 21:08:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2803, Unknown=2, NotChecked=0, Total=3192 [2022-07-20 21:08:55,996 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 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 21:08:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:56,750 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-07-20 21:08:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 21:08:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 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 69 [2022-07-20 21:08:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:56,751 INFO L225 Difference]: With dead ends: 133 [2022-07-20 21:08:56,751 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 21:08:56,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=779, Invalid=6359, Unknown=2, NotChecked=0, Total=7140 [2022-07-20 21:08:56,755 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:56,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 427 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 392 Invalid, 0 Unknown, 177 Unchecked, 0.1s Time] [2022-07-20 21:08:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 21:08:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-07-20 21:08:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 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 21:08:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-20 21:08:56,763 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 69 [2022-07-20 21:08:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:56,763 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-20 21:08:56,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 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 21:08:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-20 21:08:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 21:08:56,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:56,764 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:56,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 21:08:56,979 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,SelfDestructingSolverStorable21 [2022-07-20 21:08:56,980 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:56,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:56,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1242460280, now seen corresponding path program 19 times [2022-07-20 21:08:56,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:56,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907741814] [2022-07-20 21:08:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:56,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:57,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:57,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907741814] [2022-07-20 21:08:57,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907741814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:57,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909010807] [2022-07-20 21:08:57,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:08:57,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:57,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:57,227 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 21:08:57,227 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 21:08:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 21:08:57,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:57,345 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 15 treesize of output 11 [2022-07-20 21:08:57,393 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:08:57,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:08:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:57,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:08:57,771 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 16 treesize of output 14 [2022-07-20 21:08:57,773 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 24 [2022-07-20 21:08:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:57,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909010807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:08:57,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:08:57,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 35 [2022-07-20 21:08:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093415548] [2022-07-20 21:08:57,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:08:57,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:08:57,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:08:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:08:57,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:08:57,822 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 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 21:08:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:08:58,531 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2022-07-20 21:08:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 21:08:58,531 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 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 72 [2022-07-20 21:08:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:08:58,532 INFO L225 Difference]: With dead ends: 146 [2022-07-20 21:08:58,532 INFO L226 Difference]: Without dead ends: 144 [2022-07-20 21:08:58,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 133 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 21:08:58,533 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:08:58,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 528 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1083 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-07-20 21:08:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-20 21:08:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2022-07-20 21:08:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 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 21:08:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2022-07-20 21:08:58,543 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 72 [2022-07-20 21:08:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:08:58,543 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2022-07-20 21:08:58,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 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 21:08:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2022-07-20 21:08:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:08:58,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:08:58,544 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:08:58,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-20 21:08:58,744 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,SelfDestructingSolverStorable22 [2022-07-20 21:08:58,745 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:08:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:08:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1008588316, now seen corresponding path program 20 times [2022-07-20 21:08:58,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:08:58,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507078580] [2022-07-20 21:08:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:08:58,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:08:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:08:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:08:59,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:08:59,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507078580] [2022-07-20 21:08:59,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507078580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:08:59,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244702816] [2022-07-20 21:08:59,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:08:59,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:08:59,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:08:59,026 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 21:08:59,027 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 21:08:59,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:08:59,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:08:59,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 21:08:59,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:08:59,141 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 15 treesize of output 11 [2022-07-20 21:08:59,173 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:08:59,173 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 25 treesize of output 24 [2022-07-20 21:08:59,286 INFO L356 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2022-07-20 21:08:59,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-20 21:09:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:01,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:01,713 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_502| Int)) (or (and (not (<= |v_ULTIMATE.start_main_~i~0#1_502| 7)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_502| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_502|)))) is different from false [2022-07-20 21:09:01,718 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 23 treesize of output 21 [2022-07-20 21:09:01,720 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 49 treesize of output 45 [2022-07-20 21:09:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-07-20 21:09:01,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244702816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:01,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:01,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 42 [2022-07-20 21:09:01,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398728153] [2022-07-20 21:09:01,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:01,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:09:01,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:01,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:09:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1482, Unknown=1, NotChecked=78, Total=1722 [2022-07-20 21:09:01,775 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 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 21:09:02,409 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_502| Int)) (or (and (not (<= |v_ULTIMATE.start_main_~i~0#1_502| 7)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_502| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_502|)))) (<= |c_ULTIMATE.start_main_~i~0#1| 8) (<= 8 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)) is different from false [2022-07-20 21:09:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:03,558 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2022-07-20 21:09:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-20 21:09:03,559 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 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 75 [2022-07-20 21:09:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:03,560 INFO L225 Difference]: With dead ends: 171 [2022-07-20 21:09:03,560 INFO L226 Difference]: Without dead ends: 169 [2022-07-20 21:09:03,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=224, Invalid=2434, Unknown=2, NotChecked=202, Total=2862 [2022-07-20 21:09:03,561 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:03,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 532 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 838 Invalid, 0 Unknown, 235 Unchecked, 0.3s Time] [2022-07-20 21:09:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-20 21:09:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 100. [2022-07-20 21:09:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 21:09:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2022-07-20 21:09:03,572 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 75 [2022-07-20 21:09:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:03,572 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2022-07-20 21:09:03,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 42 states have internal predecessors, (127), 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 21:09:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2022-07-20 21:09:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 21:09:03,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:03,573 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:03,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-20 21:09:03,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:03,789 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1156969278, now seen corresponding path program 21 times [2022-07-20 21:09:03,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:03,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046253019] [2022-07-20 21:09:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:03,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:04,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:04,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046253019] [2022-07-20 21:09:04,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046253019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:04,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396329383] [2022-07-20 21:09:04,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:09:04,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:04,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:04,086 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 21:09:04,088 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 21:09:04,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-20 21:09:04,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:04,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 21:09:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:04,593 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 15 treesize of output 11 [2022-07-20 21:09:05,235 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:09:05,235 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 44 treesize of output 23 [2022-07-20 21:09:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:05,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:06,012 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 21:09:06,016 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 28 [2022-07-20 21:09:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396329383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:06,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2022-07-20 21:09:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714694777] [2022-07-20 21:09:06,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:06,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 21:09:06,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 21:09:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 21:09:06,042 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 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 21:09:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:07,226 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2022-07-20 21:09:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-20 21:09:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 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 76 [2022-07-20 21:09:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:07,230 INFO L225 Difference]: With dead ends: 146 [2022-07-20 21:09:07,230 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 21:09:07,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1103, Invalid=9403, Unknown=0, NotChecked=0, Total=10506 [2022-07-20 21:09:07,231 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:07,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 476 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 461 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2022-07-20 21:09:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 21:09:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-07-20 21:09:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.101010101010101) internal successors, (109), 99 states have internal predecessors, (109), 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 21:09:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2022-07-20 21:09:07,242 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 76 [2022-07-20 21:09:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:07,242 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2022-07-20 21:09:07,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 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 21:09:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2022-07-20 21:09:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 21:09:07,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:07,243 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:07,260 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 21:09:07,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:07,444 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1212887086, now seen corresponding path program 22 times [2022-07-20 21:09:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:07,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738236308] [2022-07-20 21:09:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:07,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738236308] [2022-07-20 21:09:07,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738236308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797924042] [2022-07-20 21:09:07,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:09:07,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:07,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:07,780 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 21:09:07,781 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 21:09:07,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:09:07,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 21:09:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:07,910 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 15 treesize of output 11 [2022-07-20 21:09:07,957 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:09:07,958 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 27 treesize of output 26 [2022-07-20 21:09:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:08,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:08,376 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 16 treesize of output 14 [2022-07-20 21:09:08,378 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 24 [2022-07-20 21:09:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:08,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797924042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:08,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:08,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 38 [2022-07-20 21:09:08,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387220613] [2022-07-20 21:09:08,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:08,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:09:08,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:08,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:09:08,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:09:08,434 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:09:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:09,403 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2022-07-20 21:09:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 21:09:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-20 21:09:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:09,405 INFO L225 Difference]: With dead ends: 195 [2022-07-20 21:09:09,406 INFO L226 Difference]: Without dead ends: 193 [2022-07-20 21:09:09,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 21:09:09,407 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 96 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:09,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 810 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1507 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-07-20 21:09:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-20 21:09:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 105. [2022-07-20 21:09:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 104 states have internal predecessors, (114), 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 21:09:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2022-07-20 21:09:09,426 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 79 [2022-07-20 21:09:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:09,426 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2022-07-20 21:09:09,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:09:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2022-07-20 21:09:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 21:09:09,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:09,428 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:09,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-20 21:09:09,643 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,SelfDestructingSolverStorable25 [2022-07-20 21:09:09,644 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash -931415362, now seen corresponding path program 23 times [2022-07-20 21:09:09,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:09,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180721872] [2022-07-20 21:09:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:09,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:09,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:09,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180721872] [2022-07-20 21:09:09,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180721872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:09,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229376834] [2022-07-20 21:09:09,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:09:09,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:09,966 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 21:09:09,967 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 21:09:10,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-20 21:09:10,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 21:09:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:10,173 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 15 treesize of output 11 [2022-07-20 21:09:10,202 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:09:10,203 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 25 treesize of output 24 [2022-07-20 21:09:10,233 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:09:10,233 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 25 treesize of output 24 [2022-07-20 21:09:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:10,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:10,708 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 16 treesize of output 14 [2022-07-20 21:09:10,709 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 24 [2022-07-20 21:09:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:09:10,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229376834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:10,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:10,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 39 [2022-07-20 21:09:10,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190927912] [2022-07-20 21:09:10,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:10,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:09:10,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:10,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:09:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:09:10,773 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 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 21:09:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:11,633 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2022-07-20 21:09:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-20 21:09:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 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 82 [2022-07-20 21:09:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:11,634 INFO L225 Difference]: With dead ends: 190 [2022-07-20 21:09:11,634 INFO L226 Difference]: Without dead ends: 188 [2022-07-20 21:09:11,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 21:09:11,635 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 103 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:11,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 738 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:09:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-20 21:09:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2022-07-20 21:09:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 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 21:09:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-07-20 21:09:11,656 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 82 [2022-07-20 21:09:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:11,657 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-07-20 21:09:11,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 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 21:09:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-07-20 21:09:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 21:09:11,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:11,657 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:11,675 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 21:09:11,869 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,SelfDestructingSolverStorable26 [2022-07-20 21:09:11,870 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash 925630088, now seen corresponding path program 24 times [2022-07-20 21:09:11,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:11,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829577851] [2022-07-20 21:09:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:12,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829577851] [2022-07-20 21:09:12,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829577851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122282087] [2022-07-20 21:09:12,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:09:12,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:12,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:12,193 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 21:09:12,194 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 21:09:12,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-20 21:09:12,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:12,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:09:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:12,812 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 15 treesize of output 11 [2022-07-20 21:09:13,533 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:09:13,533 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 44 treesize of output 23 [2022-07-20 21:09:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 190 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:13,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:14,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-20 21:09:14,603 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 28 [2022-07-20 21:09:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:14,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122282087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:14,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:14,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2022-07-20 21:09:14,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177417696] [2022-07-20 21:09:14,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:14,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-20 21:09:14,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:14,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-20 21:09:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3903, Unknown=1, NotChecked=0, Total=4422 [2022-07-20 21:09:14,632 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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 21:09:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:15,988 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2022-07-20 21:09:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 21:09:15,989 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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 83 [2022-07-20 21:09:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:15,989 INFO L225 Difference]: With dead ends: 187 [2022-07-20 21:09:15,989 INFO L226 Difference]: Without dead ends: 139 [2022-07-20 21:09:15,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1269, Invalid=11162, Unknown=1, NotChecked=0, Total=12432 [2022-07-20 21:09:15,991 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 79 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:15,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 496 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 496 Invalid, 0 Unknown, 330 Unchecked, 0.2s Time] [2022-07-20 21:09:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-20 21:09:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-07-20 21:09:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.072992700729927) internal successors, (147), 137 states have internal predecessors, (147), 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 21:09:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2022-07-20 21:09:16,012 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 83 [2022-07-20 21:09:16,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:16,012 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2022-07-20 21:09:16,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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 21:09:16,012 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2022-07-20 21:09:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-20 21:09:16,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:16,013 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:16,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-20 21:09:16,227 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,SelfDestructingSolverStorable27 [2022-07-20 21:09:16,228 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1667994484, now seen corresponding path program 25 times [2022-07-20 21:09:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:16,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187078461] [2022-07-20 21:09:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:16,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187078461] [2022-07-20 21:09:16,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187078461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589578486] [2022-07-20 21:09:16,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:09:16,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:16,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:16,571 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 21:09:16,572 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 21:09:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 21:09:16,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:16,717 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 15 treesize of output 11 [2022-07-20 21:09:16,760 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:09:16,761 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 27 treesize of output 26 [2022-07-20 21:09:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:17,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:17,251 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 16 treesize of output 14 [2022-07-20 21:09:17,254 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 24 [2022-07-20 21:09:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:17,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589578486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:17,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:17,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 41 [2022-07-20 21:09:17,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665852249] [2022-07-20 21:09:17,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:17,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 21:09:17,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:17,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 21:09:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 21:09:17,320 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 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 21:09:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:18,381 INFO L93 Difference]: Finished difference Result 203 states and 211 transitions. [2022-07-20 21:09:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-20 21:09:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 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 86 [2022-07-20 21:09:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:18,383 INFO L225 Difference]: With dead ends: 203 [2022-07-20 21:09:18,383 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 21:09:18,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=5504, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 21:09:18,384 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 114 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:18,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 905 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1708 Invalid, 0 Unknown, 5 Unchecked, 0.6s Time] [2022-07-20 21:09:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 21:09:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 143. [2022-07-20 21:09:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 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 21:09:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2022-07-20 21:09:18,415 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 86 [2022-07-20 21:09:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:18,415 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2022-07-20 21:09:18,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 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 21:09:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2022-07-20 21:09:18,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 21:09:18,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:18,416 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:18,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-20 21:09:18,619 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,SelfDestructingSolverStorable28 [2022-07-20 21:09:18,619 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1635858680, now seen corresponding path program 26 times [2022-07-20 21:09:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:18,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714178931] [2022-07-20 21:09:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:18,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:19,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:19,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714178931] [2022-07-20 21:09:19,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714178931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:19,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815674249] [2022-07-20 21:09:19,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:09:19,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:19,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:19,015 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 21:09:19,016 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 21:09:19,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:09:19,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:19,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 21:09:19,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:19,175 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 15 treesize of output 11 [2022-07-20 21:09:19,206 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:09:19,206 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 25 treesize of output 24 [2022-07-20 21:09:19,238 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:09:19,239 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 25 treesize of output 24 [2022-07-20 21:09:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 2 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:19,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:19,744 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 16 treesize of output 14 [2022-07-20 21:09:19,746 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 24 [2022-07-20 21:09:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:09:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815674249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:19,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:19,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 42 [2022-07-20 21:09:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008567986] [2022-07-20 21:09:19,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:19,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:09:19,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:09:19,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:09:19,808 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 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 21:09:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:20,784 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2022-07-20 21:09:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 21:09:20,785 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 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 89 [2022-07-20 21:09:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:20,785 INFO L225 Difference]: With dead ends: 198 [2022-07-20 21:09:20,785 INFO L226 Difference]: Without dead ends: 196 [2022-07-20 21:09:20,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 157 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 21:09:20,787 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:20,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 842 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 21:09:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-20 21:09:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2022-07-20 21:09:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.070921985815603) internal successors, (151), 141 states have internal predecessors, (151), 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 21:09:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2022-07-20 21:09:20,814 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 89 [2022-07-20 21:09:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:20,814 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2022-07-20 21:09:20,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 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 21:09:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2022-07-20 21:09:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 21:09:20,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:20,815 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:20,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:21,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:21,025 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash -592174806, now seen corresponding path program 27 times [2022-07-20 21:09:21,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:21,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889586335] [2022-07-20 21:09:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:21,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889586335] [2022-07-20 21:09:21,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889586335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090653249] [2022-07-20 21:09:21,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:09:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:21,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:21,372 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 21:09:21,372 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 21:09:21,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-20 21:09:21,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 21:09:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:21,920 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 15 treesize of output 11 [2022-07-20 21:09:22,760 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:09:22,761 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 44 treesize of output 23 [2022-07-20 21:09:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:22,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:23,918 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 21:09:23,920 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 28 [2022-07-20 21:09:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:23,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090653249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:23,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:23,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2022-07-20 21:09:23,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751772452] [2022-07-20 21:09:23,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:23,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-20 21:09:23,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:23,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-20 21:09:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4520, Unknown=1, NotChecked=0, Total=5112 [2022-07-20 21:09:23,962 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 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 21:09:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:25,437 INFO L93 Difference]: Finished difference Result 194 states and 203 transitions. [2022-07-20 21:09:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-20 21:09:25,438 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 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 90 [2022-07-20 21:09:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:25,439 INFO L225 Difference]: With dead ends: 194 [2022-07-20 21:09:25,439 INFO L226 Difference]: Without dead ends: 142 [2022-07-20 21:09:25,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2706 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1415, Invalid=12864, Unknown=1, NotChecked=0, Total=14280 [2022-07-20 21:09:25,441 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:25,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 553 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 616 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2022-07-20 21:09:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-20 21:09:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-07-20 21:09:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0638297872340425) internal successors, (150), 141 states have internal predecessors, (150), 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 21:09:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2022-07-20 21:09:25,469 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 90 [2022-07-20 21:09:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:25,469 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2022-07-20 21:09:25,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 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 21:09:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2022-07-20 21:09:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 21:09:25,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:25,470 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:25,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:25,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:25,683 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash 756771518, now seen corresponding path program 28 times [2022-07-20 21:09:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:25,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240721919] [2022-07-20 21:09:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:26,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:26,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240721919] [2022-07-20 21:09:26,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240721919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:26,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591532249] [2022-07-20 21:09:26,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:09:26,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:26,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:26,047 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:26,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 21:09:26,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:09:26,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-20 21:09:26,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:26,199 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 15 treesize of output 11 [2022-07-20 21:09:26,244 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:09:26,244 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 27 treesize of output 26 [2022-07-20 21:09:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:26,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:26,759 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 16 treesize of output 14 [2022-07-20 21:09:26,761 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 24 [2022-07-20 21:09:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:26,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591532249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:26,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:26,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2022-07-20 21:09:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372196878] [2022-07-20 21:09:26,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:26,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 21:09:26,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 21:09:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 21:09:26,826 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 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 21:09:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:28,000 INFO L93 Difference]: Finished difference Result 211 states and 218 transitions. [2022-07-20 21:09:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-20 21:09:28,000 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 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 93 [2022-07-20 21:09:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:28,001 INFO L225 Difference]: With dead ends: 211 [2022-07-20 21:09:28,001 INFO L226 Difference]: Without dead ends: 209 [2022-07-20 21:09:28,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2022-07-20 21:09:28,003 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 150 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:28,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1022 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1917 Invalid, 0 Unknown, 9 Unchecked, 0.6s Time] [2022-07-20 21:09:28,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-20 21:09:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2022-07-20 21:09:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 146 states have internal predecessors, (155), 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 21:09:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2022-07-20 21:09:28,030 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 93 [2022-07-20 21:09:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:28,030 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2022-07-20 21:09:28,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 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 21:09:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2022-07-20 21:09:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 21:09:28,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:28,031 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:28,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:28,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-20 21:09:28,231 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash 287613210, now seen corresponding path program 2 times [2022-07-20 21:09:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552988354] [2022-07-20 21:09:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:09:28,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:28,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552988354] [2022-07-20 21:09:28,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552988354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:28,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590040105] [2022-07-20 21:09:28,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:09:28,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:28,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:28,384 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:28,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 21:09:28,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:09:28,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:28,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:09:28,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:09:28,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:09:28,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590040105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:28,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:28,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-07-20 21:09:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119556512] [2022-07-20 21:09:28,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:28,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 21:09:28,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 21:09:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:09:28,914 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 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 21:09:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:29,213 INFO L93 Difference]: Finished difference Result 458 states and 504 transitions. [2022-07-20 21:09:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 21:09:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 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 93 [2022-07-20 21:09:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:29,214 INFO L225 Difference]: With dead ends: 458 [2022-07-20 21:09:29,214 INFO L226 Difference]: Without dead ends: 406 [2022-07-20 21:09:29,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:09:29,215 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 541 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:29,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 152 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:09:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-07-20 21:09:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 201. [2022-07-20 21:09:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.135) internal successors, (227), 200 states have internal predecessors, (227), 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 21:09:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2022-07-20 21:09:29,245 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 93 [2022-07-20 21:09:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:29,246 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2022-07-20 21:09:29,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 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 21:09:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2022-07-20 21:09:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-20 21:09:29,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:29,246 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:29,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-20 21:09:29,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:29,447 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:29,447 INFO L85 PathProgramCache]: Analyzing trace with hash -792278870, now seen corresponding path program 29 times [2022-07-20 21:09:29,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:29,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066020866] [2022-07-20 21:09:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:29,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:29,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:29,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066020866] [2022-07-20 21:09:29,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066020866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:29,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723382200] [2022-07-20 21:09:29,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:09:29,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:29,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:29,829 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:29,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 21:09:30,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-20 21:09:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:30,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 21:09:30,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:30,127 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 15 treesize of output 11 [2022-07-20 21:09:30,157 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:09:30,158 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 25 treesize of output 24 [2022-07-20 21:09:30,200 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:09:30,200 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 25 treesize of output 24 [2022-07-20 21:09:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:30,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:30,754 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 16 treesize of output 14 [2022-07-20 21:09:30,756 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 24 [2022-07-20 21:09:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:09:30,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723382200] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:30,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:30,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 45 [2022-07-20 21:09:30,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358835069] [2022-07-20 21:09:30,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:30,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 21:09:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 21:09:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:09:30,829 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 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 21:09:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:31,978 INFO L93 Difference]: Finished difference Result 260 states and 285 transitions. [2022-07-20 21:09:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-20 21:09:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 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 96 [2022-07-20 21:09:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:31,979 INFO L225 Difference]: With dead ends: 260 [2022-07-20 21:09:31,979 INFO L226 Difference]: Without dead ends: 258 [2022-07-20 21:09:31,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 21:09:31,980 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 120 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:31,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1030 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 21:09:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-20 21:09:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 200. [2022-07-20 21:09:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.135678391959799) internal successors, (226), 199 states have internal predecessors, (226), 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 21:09:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 226 transitions. [2022-07-20 21:09:32,012 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 226 transitions. Word has length 96 [2022-07-20 21:09:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:32,012 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 226 transitions. [2022-07-20 21:09:32,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 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 21:09:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 226 transitions. [2022-07-20 21:09:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 21:09:32,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:32,013 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:32,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:32,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:32,227 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:32,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash 280183668, now seen corresponding path program 30 times [2022-07-20 21:09:32,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:32,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536883869] [2022-07-20 21:09:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:32,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:32,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:32,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536883869] [2022-07-20 21:09:32,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536883869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:32,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692050008] [2022-07-20 21:09:32,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:09:32,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:32,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:32,742 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:32,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 21:09:33,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-20 21:09:33,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 21:09:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:33,323 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 15 treesize of output 11 [2022-07-20 21:09:34,164 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:09:34,164 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 44 treesize of output 23 [2022-07-20 21:09:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 276 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:34,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:35,126 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 21:09:35,128 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 28 [2022-07-20 21:09:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 264 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:35,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692050008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:35,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:35,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 76 [2022-07-20 21:09:35,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292302164] [2022-07-20 21:09:35,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:35,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-20 21:09:35,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:35,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-20 21:09:35,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=4904, Unknown=0, NotChecked=0, Total=5700 [2022-07-20 21:09:35,160 INFO L87 Difference]: Start difference. First operand 200 states and 226 transitions. Second operand has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 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 21:09:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:36,541 INFO L93 Difference]: Finished difference Result 257 states and 283 transitions. [2022-07-20 21:09:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-20 21:09:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 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 97 [2022-07-20 21:09:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:36,543 INFO L225 Difference]: With dead ends: 257 [2022-07-20 21:09:36,543 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 21:09:36,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4174 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2078, Invalid=14178, Unknown=0, NotChecked=0, Total=16256 [2022-07-20 21:09:36,544 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 200 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:36,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 607 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 321 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-07-20 21:09:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 21:09:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-07-20 21:09:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1306532663316582) internal successors, (225), 199 states have internal predecessors, (225), 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 21:09:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2022-07-20 21:09:36,577 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 97 [2022-07-20 21:09:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:36,577 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2022-07-20 21:09:36,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 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 21:09:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2022-07-20 21:09:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-20 21:09:36,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:36,578 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:36,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:36,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-20 21:09:36,778 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 308661088, now seen corresponding path program 31 times [2022-07-20 21:09:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:36,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896415715] [2022-07-20 21:09:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:36,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:37,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:37,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896415715] [2022-07-20 21:09:37,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896415715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:37,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247132967] [2022-07-20 21:09:37,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:09:37,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:37,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:37,322 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:37,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 21:09:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 21:09:37,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:37,668 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 15 treesize of output 11 [2022-07-20 21:09:37,731 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:09:37,731 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 25 treesize of output 24 [2022-07-20 21:09:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:38,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:40,674 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1054| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1054|)) (forall ((v_ArrVal_1362 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1054| 4)) v_ArrVal_1362) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))) is different from false [2022-07-20 21:09:40,679 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 23 treesize of output 21 [2022-07-20 21:09:40,681 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 178 treesize of output 170 [2022-07-20 21:09:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-20 21:09:40,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247132967] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:40,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:40,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 32] total 76 [2022-07-20 21:09:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369171005] [2022-07-20 21:09:40,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:40,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-20 21:09:40,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-20 21:09:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=5228, Unknown=1, NotChecked=146, Total=5700 [2022-07-20 21:09:40,901 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 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 21:09:43,631 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= .cse0 48) (forall ((|v_ULTIMATE.start_main_~i~0#1_1054| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1054|)) (forall ((v_ArrVal_1362 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1054| 4)) v_ArrVal_1362) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 12 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 0))) is different from false [2022-07-20 21:09:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:44,530 INFO L93 Difference]: Finished difference Result 212 states and 236 transitions. [2022-07-20 21:09:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-20 21:09:44,531 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 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 100 [2022-07-20 21:09:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:44,532 INFO L225 Difference]: With dead ends: 212 [2022-07-20 21:09:44,532 INFO L226 Difference]: Without dead ends: 210 [2022-07-20 21:09:44,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3792 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=604, Invalid=10322, Unknown=2, NotChecked=414, Total=11342 [2022-07-20 21:09:44,533 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 170 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:44,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1341 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3017 Invalid, 0 Unknown, 134 Unchecked, 0.9s Time] [2022-07-20 21:09:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-20 21:09:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-07-20 21:09:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1280788177339902) internal successors, (229), 203 states have internal predecessors, (229), 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 21:09:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 229 transitions. [2022-07-20 21:09:44,571 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 229 transitions. Word has length 100 [2022-07-20 21:09:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:44,571 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 229 transitions. [2022-07-20 21:09:44,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 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 21:09:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 229 transitions. [2022-07-20 21:09:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-20 21:09:44,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:44,572 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:44,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:44,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-20 21:09:44,787 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1833401578, now seen corresponding path program 32 times [2022-07-20 21:09:44,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:44,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431937592] [2022-07-20 21:09:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:44,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:45,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:45,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431937592] [2022-07-20 21:09:45,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431937592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:45,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224292594] [2022-07-20 21:09:45,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:09:45,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:45,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:45,243 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:45,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 21:09:45,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:09:45,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:45,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-20 21:09:45,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:45,418 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 15 treesize of output 11 [2022-07-20 21:09:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:45,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:46,002 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 16 treesize of output 14 [2022-07-20 21:09:46,003 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 24 [2022-07-20 21:09:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:46,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224292594] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:46,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:46,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-07-20 21:09:46,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934861775] [2022-07-20 21:09:46,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:46,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:09:46,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:46,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:09:46,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:09:46,090 INFO L87 Difference]: Start difference. First operand 204 states and 229 transitions. Second operand has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 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 21:09:47,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:47,361 INFO L93 Difference]: Finished difference Result 216 states and 240 transitions. [2022-07-20 21:09:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-20 21:09:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 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 104 [2022-07-20 21:09:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:47,362 INFO L225 Difference]: With dead ends: 216 [2022-07-20 21:09:47,362 INFO L226 Difference]: Without dead ends: 214 [2022-07-20 21:09:47,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 188 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=326, Invalid=5680, Unknown=0, NotChecked=0, Total=6006 [2022-07-20 21:09:47,363 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 89 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:47,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1033 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 21:09:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-20 21:09:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2022-07-20 21:09:47,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1256038647342994) internal successors, (233), 207 states have internal predecessors, (233), 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 21:09:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 233 transitions. [2022-07-20 21:09:47,408 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 233 transitions. Word has length 104 [2022-07-20 21:09:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:47,408 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 233 transitions. [2022-07-20 21:09:47,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 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 21:09:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 233 transitions. [2022-07-20 21:09:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 21:09:47,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:47,409 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:47,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:47,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-20 21:09:47,626 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1227067444, now seen corresponding path program 33 times [2022-07-20 21:09:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638370957] [2022-07-20 21:09:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:47,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 339 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:47,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:47,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638370957] [2022-07-20 21:09:47,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638370957] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:47,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123839009] [2022-07-20 21:09:47,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:09:47,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:47,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:47,907 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:47,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 21:09:48,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-20 21:09:48,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:48,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 21:09:48,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:48,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123839009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:49,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:49,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-20 21:09:49,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214889747] [2022-07-20 21:09:49,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 21:09:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 21:09:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:09:49,005 INFO L87 Difference]: Start difference. First operand 208 states and 233 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 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 21:09:49,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:49,318 INFO L93 Difference]: Finished difference Result 282 states and 306 transitions. [2022-07-20 21:09:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 21:09:49,318 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 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 108 [2022-07-20 21:09:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:49,319 INFO L225 Difference]: With dead ends: 282 [2022-07-20 21:09:49,319 INFO L226 Difference]: Without dead ends: 218 [2022-07-20 21:09:49,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 21:09:49,320 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 287 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:49,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 270 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-20 21:09:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2022-07-20 21:09:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1207729468599035) internal successors, (232), 207 states have internal predecessors, (232), 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 21:09:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 232 transitions. [2022-07-20 21:09:49,355 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 232 transitions. Word has length 108 [2022-07-20 21:09:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:49,355 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 232 transitions. [2022-07-20 21:09:49,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 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 21:09:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 232 transitions. [2022-07-20 21:09:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 21:09:49,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:49,356 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:49,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-20 21:09:49,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:49,556 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash -672924576, now seen corresponding path program 34 times [2022-07-20 21:09:49,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:49,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707267206] [2022-07-20 21:09:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:49,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:50,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707267206] [2022-07-20 21:09:50,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707267206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:50,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585424184] [2022-07-20 21:09:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:09:50,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:50,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:50,059 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:50,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 21:09:50,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:09:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-20 21:09:50,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:50,256 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 15 treesize of output 11 [2022-07-20 21:09:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:50,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:50,911 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 16 treesize of output 14 [2022-07-20 21:09:50,913 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 28 treesize of output 24 [2022-07-20 21:09:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:50,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585424184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:50,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:50,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 50 [2022-07-20 21:09:50,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078762940] [2022-07-20 21:09:50,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:50,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 21:09:50,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 21:09:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:09:50,997 INFO L87 Difference]: Start difference. First operand 208 states and 232 transitions. Second operand has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 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 21:09:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:52,475 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2022-07-20 21:09:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-20 21:09:52,475 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 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 111 [2022-07-20 21:09:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:52,476 INFO L225 Difference]: With dead ends: 220 [2022-07-20 21:09:52,476 INFO L226 Difference]: Without dead ends: 218 [2022-07-20 21:09:52,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 201 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=347, Invalid=6459, Unknown=0, NotChecked=0, Total=6806 [2022-07-20 21:09:52,477 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 94 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:52,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1332 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 21:09:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-20 21:09:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2022-07-20 21:09:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1184834123222749) internal successors, (236), 211 states have internal predecessors, (236), 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 21:09:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2022-07-20 21:09:52,517 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 111 [2022-07-20 21:09:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:52,517 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2022-07-20 21:09:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 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 21:09:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2022-07-20 21:09:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 21:09:52,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:52,518 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:52,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:52,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-20 21:09:52,736 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:52,736 INFO L85 PathProgramCache]: Analyzing trace with hash 464925718, now seen corresponding path program 35 times [2022-07-20 21:09:52,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:52,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193527263] [2022-07-20 21:09:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:52,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:53,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:53,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193527263] [2022-07-20 21:09:53,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193527263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:53,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327846240] [2022-07-20 21:09:53,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:09:53,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:53,062 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:53,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 21:09:53,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-20 21:09:53,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:53,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:09:53,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:53,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:53,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327846240] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:53,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:53,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-20 21:09:53,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505796408] [2022-07-20 21:09:53,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:53,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 21:09:53,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:53,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 21:09:53,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 21:09:53,922 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 states have internal predecessors, (186), 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 21:09:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:09:54,241 INFO L93 Difference]: Finished difference Result 290 states and 313 transitions. [2022-07-20 21:09:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 21:09:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 states have internal predecessors, (186), 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 115 [2022-07-20 21:09:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:09:54,243 INFO L225 Difference]: With dead ends: 290 [2022-07-20 21:09:54,243 INFO L226 Difference]: Without dead ends: 222 [2022-07-20 21:09:54,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 21:09:54,244 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 288 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:09:54,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 273 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:09:54,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-20 21:09:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 212. [2022-07-20 21:09:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.113744075829384) internal successors, (235), 211 states have internal predecessors, (235), 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 21:09:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 235 transitions. [2022-07-20 21:09:54,284 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 235 transitions. Word has length 115 [2022-07-20 21:09:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:09:54,284 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 235 transitions. [2022-07-20 21:09:54,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 states have internal predecessors, (186), 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 21:09:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 235 transitions. [2022-07-20 21:09:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-20 21:09:54,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:09:54,285 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:09:54,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-20 21:09:54,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-20 21:09:54,499 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:09:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:09:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1200036098, now seen corresponding path program 36 times [2022-07-20 21:09:54,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:09:54,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291967394] [2022-07-20 21:09:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:09:54,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:09:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:09:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:55,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:09:55,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291967394] [2022-07-20 21:09:55,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291967394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:09:55,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75958637] [2022-07-20 21:09:55,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:09:55,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:09:55,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:09:55,054 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:09:55,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 21:09:55,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-20 21:09:55,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:09:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 21:09:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:09:56,297 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 15 treesize of output 11 [2022-07-20 21:09:57,530 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:09:57,531 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 44 treesize of output 23 [2022-07-20 21:09:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:57,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:09:58,991 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 21:09:58,993 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 28 [2022-07-20 21:09:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:09:59,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75958637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:09:59,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:09:59,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2022-07-20 21:09:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805742111] [2022-07-20 21:09:59,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:09:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-20 21:09:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:09:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-20 21:09:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=7439, Unknown=0, NotChecked=0, Total=8372 [2022-07-20 21:09:59,032 INFO L87 Difference]: Start difference. First operand 212 states and 235 transitions. Second operand has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 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 21:10:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:01,502 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2022-07-20 21:10:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-20 21:10:01,502 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 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 118 [2022-07-20 21:10:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:01,503 INFO L225 Difference]: With dead ends: 281 [2022-07-20 21:10:01,503 INFO L226 Difference]: Without dead ends: 213 [2022-07-20 21:10:01,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4520 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2225, Invalid=21955, Unknown=0, NotChecked=0, Total=24180 [2022-07-20 21:10:01,505 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:01,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1092 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1046 Invalid, 0 Unknown, 281 Unchecked, 0.3s Time] [2022-07-20 21:10:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-20 21:10:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-07-20 21:10:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1090047393364928) internal successors, (234), 211 states have internal predecessors, (234), 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 21:10:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 234 transitions. [2022-07-20 21:10:01,557 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 234 transitions. Word has length 118 [2022-07-20 21:10:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:01,557 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 234 transitions. [2022-07-20 21:10:01,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 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 21:10:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 234 transitions. [2022-07-20 21:10:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-20 21:10:01,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:01,558 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:01,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-20 21:10:01,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:01,759 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:01,759 INFO L85 PathProgramCache]: Analyzing trace with hash 835124374, now seen corresponding path program 37 times [2022-07-20 21:10:01,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:01,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493215116] [2022-07-20 21:10:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:01,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:02,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:02,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493215116] [2022-07-20 21:10:02,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493215116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:02,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358194912] [2022-07-20 21:10:02,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:10:02,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:02,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:02,311 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:02,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 21:10:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-20 21:10:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:02,519 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 15 treesize of output 11 [2022-07-20 21:10:02,580 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:10:02,581 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 27 treesize of output 26 [2022-07-20 21:10:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:03,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:03,377 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 16 treesize of output 14 [2022-07-20 21:10:03,378 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 24 [2022-07-20 21:10:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:03,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358194912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:03,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:03,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 56 [2022-07-20 21:10:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975259506] [2022-07-20 21:10:03,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-20 21:10:03,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-20 21:10:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 21:10:03,473 INFO L87 Difference]: Start difference. First operand 212 states and 234 transitions. Second operand has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 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 21:10:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:05,336 INFO L93 Difference]: Finished difference Result 297 states and 318 transitions. [2022-07-20 21:10:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-20 21:10:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 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 121 [2022-07-20 21:10:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:05,341 INFO L225 Difference]: With dead ends: 297 [2022-07-20 21:10:05,342 INFO L226 Difference]: Without dead ends: 295 [2022-07-20 21:10:05,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 217 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=483, Invalid=10859, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 21:10:05,342 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 150 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:05,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1617 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3252 Invalid, 0 Unknown, 35 Unchecked, 1.0s Time] [2022-07-20 21:10:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-20 21:10:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 217. [2022-07-20 21:10:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1064814814814814) internal successors, (239), 216 states have internal predecessors, (239), 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 21:10:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 239 transitions. [2022-07-20 21:10:05,383 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 239 transitions. Word has length 121 [2022-07-20 21:10:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:05,383 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 239 transitions. [2022-07-20 21:10:05,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 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 21:10:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 239 transitions. [2022-07-20 21:10:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 21:10:05,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:05,384 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:05,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:05,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-20 21:10:05,594 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 312180866, now seen corresponding path program 38 times [2022-07-20 21:10:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:05,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333008452] [2022-07-20 21:10:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:05,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:06,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:06,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333008452] [2022-07-20 21:10:06,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333008452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:06,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455588195] [2022-07-20 21:10:06,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:10:06,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:06,188 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:06,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-20 21:10:06,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:10:06,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:06,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-20 21:10:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:06,414 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 15 treesize of output 11 [2022-07-20 21:10:06,447 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:10:06,447 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 25 treesize of output 24 [2022-07-20 21:10:06,485 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:10:06,485 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 25 treesize of output 24 [2022-07-20 21:10:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 2 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:07,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:07,311 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 16 treesize of output 14 [2022-07-20 21:10:07,312 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 24 [2022-07-20 21:10:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 926 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:10:07,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455588195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:07,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:07,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 39] total 57 [2022-07-20 21:10:07,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499433518] [2022-07-20 21:10:07,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:07,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-20 21:10:07,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-20 21:10:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3007, Unknown=0, NotChecked=0, Total=3192 [2022-07-20 21:10:07,400 INFO L87 Difference]: Start difference. First operand 217 states and 239 transitions. Second operand has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 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 21:10:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:09,177 INFO L93 Difference]: Finished difference Result 292 states and 313 transitions. [2022-07-20 21:10:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-20 21:10:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 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 124 [2022-07-20 21:10:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:09,178 INFO L225 Difference]: With dead ends: 292 [2022-07-20 21:10:09,178 INFO L226 Difference]: Without dead ends: 290 [2022-07-20 21:10:09,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 222 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=424, Invalid=8318, Unknown=0, NotChecked=0, Total=8742 [2022-07-20 21:10:09,179 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 111 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 3701 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 3834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:09,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1677 Invalid, 3834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 21:10:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-20 21:10:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 216. [2022-07-20 21:10:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1069767441860465) internal successors, (238), 215 states have internal predecessors, (238), 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 21:10:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 238 transitions. [2022-07-20 21:10:09,221 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 238 transitions. Word has length 124 [2022-07-20 21:10:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:09,221 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 238 transitions. [2022-07-20 21:10:09,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 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 21:10:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 238 transitions. [2022-07-20 21:10:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-20 21:10:09,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:09,222 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:09,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-20 21:10:09,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:09,433 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:09,433 INFO L85 PathProgramCache]: Analyzing trace with hash -820893364, now seen corresponding path program 39 times [2022-07-20 21:10:09,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:09,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522617216] [2022-07-20 21:10:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:10,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:10,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522617216] [2022-07-20 21:10:10,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522617216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:10,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581789184] [2022-07-20 21:10:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:10:10,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:10,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:10,022 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:10,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-20 21:10:10,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-20 21:10:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:10,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 21:10:10,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:11,441 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 15 treesize of output 11 [2022-07-20 21:10:12,765 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:10:12,765 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 44 treesize of output 23 [2022-07-20 21:10:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 496 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:12,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:14,352 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 21:10:14,353 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 28 [2022-07-20 21:10:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 480 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:14,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581789184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:14,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:14,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2022-07-20 21:10:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717302031] [2022-07-20 21:10:14,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:14,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-20 21:10:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-20 21:10:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=8281, Unknown=0, NotChecked=0, Total=9312 [2022-07-20 21:10:14,401 INFO L87 Difference]: Start difference. First operand 216 states and 238 transitions. Second operand has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:10:16,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:16,542 INFO L93 Difference]: Finished difference Result 289 states and 311 transitions. [2022-07-20 21:10:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-20 21:10:16,542 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-07-20 21:10:16,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:16,543 INFO L225 Difference]: With dead ends: 289 [2022-07-20 21:10:16,543 INFO L226 Difference]: Without dead ends: 217 [2022-07-20 21:10:16,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2039, Invalid=20013, Unknown=0, NotChecked=0, Total=22052 [2022-07-20 21:10:16,544 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 96 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:16,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1043 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1078 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2022-07-20 21:10:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-20 21:10:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-07-20 21:10:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1023255813953488) internal successors, (237), 215 states have internal predecessors, (237), 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 21:10:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2022-07-20 21:10:16,587 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 125 [2022-07-20 21:10:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:16,587 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2022-07-20 21:10:16,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:10:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2022-07-20 21:10:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-20 21:10:16,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:16,589 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:16,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:16,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:16,795 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1760220984, now seen corresponding path program 40 times [2022-07-20 21:10:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544403037] [2022-07-20 21:10:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:16,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:17,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544403037] [2022-07-20 21:10:17,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544403037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508245357] [2022-07-20 21:10:17,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:10:17,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:17,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:17,584 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:17,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-20 21:10:17,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:10:17,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 21:10:17,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:17,829 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 15 treesize of output 11 [2022-07-20 21:10:17,888 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:10:17,888 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 27 treesize of output 26 [2022-07-20 21:10:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:18,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:18,736 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 16 treesize of output 14 [2022-07-20 21:10:18,737 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 24 [2022-07-20 21:10:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:18,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508245357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:18,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:18,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 40] total 59 [2022-07-20 21:10:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235719840] [2022-07-20 21:10:18,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:18,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-20 21:10:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-20 21:10:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3233, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 21:10:18,843 INFO L87 Difference]: Start difference. First operand 216 states and 237 transitions. Second operand has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 states have internal predecessors, (202), 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 21:10:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:20,994 INFO L93 Difference]: Finished difference Result 305 states and 325 transitions. [2022-07-20 21:10:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-20 21:10:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 states have internal predecessors, (202), 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 128 [2022-07-20 21:10:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:20,995 INFO L225 Difference]: With dead ends: 305 [2022-07-20 21:10:20,995 INFO L226 Difference]: Without dead ends: 303 [2022-07-20 21:10:20,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 230 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=510, Invalid=12146, Unknown=0, NotChecked=0, Total=12656 [2022-07-20 21:10:20,996 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 204 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:20,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1839 Invalid, 4050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 3817 Invalid, 0 Unknown, 5 Unchecked, 1.1s Time] [2022-07-20 21:10:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-20 21:10:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 221. [2022-07-20 21:10:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1) internal successors, (242), 220 states have internal predecessors, (242), 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 21:10:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 242 transitions. [2022-07-20 21:10:21,042 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 242 transitions. Word has length 128 [2022-07-20 21:10:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:21,043 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 242 transitions. [2022-07-20 21:10:21,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 states have internal predecessors, (202), 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 21:10:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 242 transitions. [2022-07-20 21:10:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-20 21:10:21,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:21,044 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:21,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-20 21:10:21,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 21:10:21,252 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1356705332, now seen corresponding path program 41 times [2022-07-20 21:10:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:21,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558200810] [2022-07-20 21:10:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:21,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:21,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:21,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558200810] [2022-07-20 21:10:21,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558200810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:21,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365116512] [2022-07-20 21:10:21,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:10:21,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:21,898 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:21,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-20 21:10:22,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-20 21:10:22,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-20 21:10:22,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:22,815 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 15 treesize of output 11 [2022-07-20 21:10:22,849 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:10:22,849 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 25 treesize of output 24 [2022-07-20 21:10:22,888 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:10:22,889 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 25 treesize of output 24 [2022-07-20 21:10:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 2 proven. 1042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:23,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:23,794 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 16 treesize of output 14 [2022-07-20 21:10:23,795 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 24 [2022-07-20 21:10:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1043 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:10:23,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365116512] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:23,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:23,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 60 [2022-07-20 21:10:23,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469969176] [2022-07-20 21:10:23,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:23,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-20 21:10:23,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:23,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-20 21:10:23,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3345, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 21:10:23,891 INFO L87 Difference]: Start difference. First operand 221 states and 242 transitions. Second operand has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 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 21:10:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:25,866 INFO L93 Difference]: Finished difference Result 300 states and 320 transitions. [2022-07-20 21:10:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-20 21:10:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 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 131 [2022-07-20 21:10:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:25,872 INFO L225 Difference]: With dead ends: 300 [2022-07-20 21:10:25,872 INFO L226 Difference]: Without dead ends: 298 [2022-07-20 21:10:25,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 235 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=446, Invalid=9256, Unknown=0, NotChecked=0, Total=9702 [2022-07-20 21:10:25,873 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 159 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 4122 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 4292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 4122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:25,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1927 Invalid, 4292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 4122 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 21:10:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-20 21:10:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 220. [2022-07-20 21:10:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.1004566210045663) internal successors, (241), 219 states have internal predecessors, (241), 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 21:10:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2022-07-20 21:10:25,922 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 131 [2022-07-20 21:10:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:25,922 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2022-07-20 21:10:25,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 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 21:10:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2022-07-20 21:10:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-20 21:10:25,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:25,923 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:25,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-20 21:10:26,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-20 21:10:26,130 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:26,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:26,130 INFO L85 PathProgramCache]: Analyzing trace with hash -979115282, now seen corresponding path program 42 times [2022-07-20 21:10:26,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:26,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455019589] [2022-07-20 21:10:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:26,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455019589] [2022-07-20 21:10:26,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455019589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481119103] [2022-07-20 21:10:26,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:10:26,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:26,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:26,779 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:26,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-20 21:10:28,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-20 21:10:28,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 21:10:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:29,497 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 15 treesize of output 11 [2022-07-20 21:10:30,944 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:10:30,944 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 44 treesize of output 23 [2022-07-20 21:10:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:30,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:32,689 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 21:10:32,691 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 28 [2022-07-20 21:10:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 544 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:32,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481119103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:32,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:32,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 102 [2022-07-20 21:10:32,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111420640] [2022-07-20 21:10:32,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:32,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-07-20 21:10:32,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-07-20 21:10:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=9168, Unknown=0, NotChecked=0, Total=10302 [2022-07-20 21:10:32,736 INFO L87 Difference]: Start difference. First operand 220 states and 241 transitions. Second operand has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 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 21:10:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:35,121 INFO L93 Difference]: Finished difference Result 297 states and 318 transitions. [2022-07-20 21:10:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-20 21:10:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 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 132 [2022-07-20 21:10:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:35,122 INFO L225 Difference]: With dead ends: 297 [2022-07-20 21:10:35,122 INFO L226 Difference]: Without dead ends: 221 [2022-07-20 21:10:35,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2237, Invalid=22255, Unknown=0, NotChecked=0, Total=24492 [2022-07-20 21:10:35,124 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:35,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1207 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1179 Invalid, 0 Unknown, 281 Unchecked, 0.4s Time] [2022-07-20 21:10:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-20 21:10:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-07-20 21:10:35,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.095890410958904) internal successors, (240), 219 states have internal predecessors, (240), 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 21:10:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 240 transitions. [2022-07-20 21:10:35,173 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 240 transitions. Word has length 132 [2022-07-20 21:10:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:35,174 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 240 transitions. [2022-07-20 21:10:35,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 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 21:10:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 240 transitions. [2022-07-20 21:10:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-20 21:10:35,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:35,175 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:35,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:35,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-20 21:10:35,382 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash -676072574, now seen corresponding path program 43 times [2022-07-20 21:10:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:35,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522260070] [2022-07-20 21:10:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:35,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:36,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:36,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522260070] [2022-07-20 21:10:36,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522260070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:36,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946093400] [2022-07-20 21:10:36,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:10:36,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:36,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:36,050 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:36,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-20 21:10:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:36,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-20 21:10:36,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:36,283 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 15 treesize of output 11 [2022-07-20 21:10:36,355 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:10:36,355 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 27 treesize of output 26 [2022-07-20 21:10:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:37,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:37,302 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 16 treesize of output 14 [2022-07-20 21:10:37,303 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 24 [2022-07-20 21:10:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:37,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946093400] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:37,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:37,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 42] total 62 [2022-07-20 21:10:37,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062940352] [2022-07-20 21:10:37,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 21:10:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 21:10:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3583, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 21:10:37,406 INFO L87 Difference]: Start difference. First operand 220 states and 240 transitions. Second operand has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 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 21:10:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:39,767 INFO L93 Difference]: Finished difference Result 313 states and 332 transitions. [2022-07-20 21:10:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-20 21:10:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 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 135 [2022-07-20 21:10:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:39,769 INFO L225 Difference]: With dead ends: 313 [2022-07-20 21:10:39,769 INFO L226 Difference]: Without dead ends: 311 [2022-07-20 21:10:39,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 243 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=537, Invalid=13505, Unknown=0, NotChecked=0, Total=14042 [2022-07-20 21:10:39,770 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 212 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 4171 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 4171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:39,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 2009 Invalid, 4416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 4171 Invalid, 0 Unknown, 5 Unchecked, 1.3s Time] [2022-07-20 21:10:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-20 21:10:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 225. [2022-07-20 21:10:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.09375) internal successors, (245), 224 states have internal predecessors, (245), 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 21:10:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 245 transitions. [2022-07-20 21:10:39,834 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 245 transitions. Word has length 135 [2022-07-20 21:10:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:39,834 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 245 transitions. [2022-07-20 21:10:39,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 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 21:10:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 245 transitions. [2022-07-20 21:10:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-20 21:10:39,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:39,836 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:39,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-20 21:10:40,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:40,045 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:40,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash -752014738, now seen corresponding path program 44 times [2022-07-20 21:10:40,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:40,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570417282] [2022-07-20 21:10:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:40,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:40,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570417282] [2022-07-20 21:10:40,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570417282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41463950] [2022-07-20 21:10:40,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:10:40,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:40,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:40,764 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:40,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-20 21:10:40,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:10:40,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-20 21:10:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:41,015 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 15 treesize of output 11 [2022-07-20 21:10:41,050 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:10:41,051 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 25 treesize of output 24 [2022-07-20 21:10:41,091 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:10:41,091 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 25 treesize of output 24 [2022-07-20 21:10:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 2 proven. 1166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:41,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:42,091 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 16 treesize of output 14 [2022-07-20 21:10:42,092 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 24 [2022-07-20 21:10:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1167 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:10:42,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41463950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:42,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:42,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 63 [2022-07-20 21:10:42,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41537243] [2022-07-20 21:10:42,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:42,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 21:10:42,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 21:10:42,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3701, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 21:10:42,192 INFO L87 Difference]: Start difference. First operand 225 states and 245 transitions. Second operand has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 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 21:10:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:44,353 INFO L93 Difference]: Finished difference Result 308 states and 327 transitions. [2022-07-20 21:10:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-20 21:10:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 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 138 [2022-07-20 21:10:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:44,354 INFO L225 Difference]: With dead ends: 308 [2022-07-20 21:10:44,354 INFO L226 Difference]: Without dead ends: 306 [2022-07-20 21:10:44,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 248 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=468, Invalid=10244, Unknown=0, NotChecked=0, Total=10712 [2022-07-20 21:10:44,355 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 116 mSDsluCounter, 1965 mSDsCounter, 0 mSdLazyCounter, 4471 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 4471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:44,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 2016 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 4471 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 21:10:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-20 21:10:44,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 224. [2022-07-20 21:10:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.094170403587444) internal successors, (244), 223 states have internal predecessors, (244), 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 21:10:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 244 transitions. [2022-07-20 21:10:44,416 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 244 transitions. Word has length 138 [2022-07-20 21:10:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:44,416 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 244 transitions. [2022-07-20 21:10:44,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 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 21:10:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 244 transitions. [2022-07-20 21:10:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-20 21:10:44,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:44,417 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:44,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:44,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-20 21:10:44,635 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash 915524152, now seen corresponding path program 45 times [2022-07-20 21:10:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:44,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428185794] [2022-07-20 21:10:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:44,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:45,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428185794] [2022-07-20 21:10:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428185794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838255888] [2022-07-20 21:10:45,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:10:45,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:45,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:45,309 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:45,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-20 21:10:46,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-20 21:10:46,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-20 21:10:46,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:47,396 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 15 treesize of output 11 [2022-07-20 21:10:48,986 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:10:48,986 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 44 treesize of output 23 [2022-07-20 21:10:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 630 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:49,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:50,923 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 21:10:50,925 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 28 [2022-07-20 21:10:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:50,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838255888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:50,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:50,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2022-07-20 21:10:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224386208] [2022-07-20 21:10:50,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-20 21:10:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-20 21:10:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 21:10:50,973 INFO L87 Difference]: Start difference. First operand 224 states and 244 transitions. Second operand has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 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 21:10:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:53,667 INFO L93 Difference]: Finished difference Result 305 states and 325 transitions. [2022-07-20 21:10:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-20 21:10:53,667 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 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 139 [2022-07-20 21:10:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:53,668 INFO L225 Difference]: With dead ends: 305 [2022-07-20 21:10:53,668 INFO L226 Difference]: Without dead ends: 225 [2022-07-20 21:10:53,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4782 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2444, Invalid=24616, Unknown=0, NotChecked=0, Total=27060 [2022-07-20 21:10:53,669 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 95 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:53,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1027 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1431 Invalid, 0 Unknown, 165 Unchecked, 0.4s Time] [2022-07-20 21:10:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-20 21:10:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-07-20 21:10:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0896860986547086) internal successors, (243), 223 states have internal predecessors, (243), 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 21:10:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 243 transitions. [2022-07-20 21:10:53,725 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 243 transitions. Word has length 139 [2022-07-20 21:10:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:53,726 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 243 transitions. [2022-07-20 21:10:53,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 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 21:10:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 243 transitions. [2022-07-20 21:10:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 21:10:53,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:53,727 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:53,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:53,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-20 21:10:53,933 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash -746738908, now seen corresponding path program 46 times [2022-07-20 21:10:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:53,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241804254] [2022-07-20 21:10:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:54,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241804254] [2022-07-20 21:10:54,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241804254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641679192] [2022-07-20 21:10:54,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:10:54,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:54,697 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:54,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-20 21:10:54,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:10:54,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:10:54,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-20 21:10:54,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:10:54,955 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 15 treesize of output 11 [2022-07-20 21:10:55,024 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:10:55,024 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 27 treesize of output 26 [2022-07-20 21:10:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:55,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:10:56,065 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 16 treesize of output 14 [2022-07-20 21:10:56,066 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 24 [2022-07-20 21:10:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:56,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641679192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:10:56,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:10:56,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 65 [2022-07-20 21:10:56,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407823374] [2022-07-20 21:10:56,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:10:56,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-20 21:10:56,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:10:56,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-20 21:10:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3951, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 21:10:56,186 INFO L87 Difference]: Start difference. First operand 224 states and 243 transitions. Second operand has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 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 21:10:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:10:58,864 INFO L93 Difference]: Finished difference Result 326 states and 344 transitions. [2022-07-20 21:10:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-20 21:10:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 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 142 [2022-07-20 21:10:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:10:58,865 INFO L225 Difference]: With dead ends: 326 [2022-07-20 21:10:58,865 INFO L226 Difference]: Without dead ends: 324 [2022-07-20 21:10:58,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 257 SyntacticMatches, 7 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3451 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=595, Invalid=14905, Unknown=0, NotChecked=0, Total=15500 [2022-07-20 21:10:58,867 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 176 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 4704 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 5062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 4704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:10:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 2149 Invalid, 5062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 4704 Invalid, 0 Unknown, 142 Unchecked, 1.4s Time] [2022-07-20 21:10:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-20 21:10:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 229. [2022-07-20 21:10:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.087719298245614) internal successors, (248), 228 states have internal predecessors, (248), 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 21:10:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-07-20 21:10:58,932 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 142 [2022-07-20 21:10:58,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:10:58,932 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-07-20 21:10:58,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 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 21:10:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-07-20 21:10:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-20 21:10:58,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:10:58,933 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:10:58,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-20 21:10:59,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:59,147 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:10:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:10:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -252636488, now seen corresponding path program 47 times [2022-07-20 21:10:59,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:10:59,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805346566] [2022-07-20 21:10:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:10:59,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:10:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:10:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:10:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:10:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805346566] [2022-07-20 21:10:59,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805346566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:10:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287797358] [2022-07-20 21:10:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:10:59,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:10:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:10:59,935 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:10:59,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-20 21:11:00,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-20 21:11:00,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:11:00,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-20 21:11:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:00,791 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 15 treesize of output 11 [2022-07-20 21:11:00,826 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:11:00,826 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 25 treesize of output 24 [2022-07-20 21:11:00,870 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:11:00,870 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 25 treesize of output 24 [2022-07-20 21:11:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 2 proven. 1297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:01,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:01,937 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 16 treesize of output 14 [2022-07-20 21:11:01,939 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 24 [2022-07-20 21:11:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:11:02,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287797358] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:02,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:02,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 66 [2022-07-20 21:11:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882519482] [2022-07-20 21:11:02,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-20 21:11:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-20 21:11:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4075, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 21:11:02,048 INFO L87 Difference]: Start difference. First operand 229 states and 248 transitions. Second operand has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 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 21:11:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:04,486 INFO L93 Difference]: Finished difference Result 316 states and 334 transitions. [2022-07-20 21:11:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-20 21:11:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 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 145 [2022-07-20 21:11:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:04,487 INFO L225 Difference]: With dead ends: 316 [2022-07-20 21:11:04,487 INFO L226 Difference]: Without dead ends: 314 [2022-07-20 21:11:04,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 261 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=490, Invalid=11282, Unknown=0, NotChecked=0, Total=11772 [2022-07-20 21:11:04,488 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 158 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 5004 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 5186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 5004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:04,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 2204 Invalid, 5186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 5004 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 21:11:04,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-20 21:11:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 228. [2022-07-20 21:11:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0881057268722467) internal successors, (247), 227 states have internal predecessors, (247), 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 21:11:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 247 transitions. [2022-07-20 21:11:04,557 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 247 transitions. Word has length 145 [2022-07-20 21:11:04,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:04,557 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 247 transitions. [2022-07-20 21:11:04,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 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 21:11:04,557 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 247 transitions. [2022-07-20 21:11:04,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-20 21:11:04,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:04,558 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:04,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-20 21:11:04,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-20 21:11:04,765 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1100144858, now seen corresponding path program 48 times [2022-07-20 21:11:04,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:04,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773836447] [2022-07-20 21:11:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:04,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:05,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:05,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773836447] [2022-07-20 21:11:05,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773836447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:05,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841474950] [2022-07-20 21:11:05,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:11:05,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:05,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:05,557 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:05,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-20 21:11:10,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-20 21:11:10,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:11:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 21:11:10,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:11,034 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 15 treesize of output 11 [2022-07-20 21:11:12,752 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:11:12,752 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 44 treesize of output 23 [2022-07-20 21:11:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 703 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:12,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:14,871 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 17 [2022-07-20 21:11:14,873 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 37 treesize of output 30 [2022-07-20 21:11:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 544 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:14,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841474950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:14,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:14,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 112 [2022-07-20 21:11:14,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233310595] [2022-07-20 21:11:14,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:14,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-20 21:11:14,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:14,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-20 21:11:14,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1322, Invalid=11110, Unknown=0, NotChecked=0, Total=12432 [2022-07-20 21:11:14,922 INFO L87 Difference]: Start difference. First operand 228 states and 247 transitions. Second operand has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 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 21:11:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:18,653 INFO L93 Difference]: Finished difference Result 313 states and 332 transitions. [2022-07-20 21:11:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-20 21:11:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 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 146 [2022-07-20 21:11:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:18,654 INFO L225 Difference]: With dead ends: 313 [2022-07-20 21:11:18,654 INFO L226 Difference]: Without dead ends: 229 [2022-07-20 21:11:18,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6916 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3225, Invalid=33831, Unknown=0, NotChecked=0, Total=37056 [2022-07-20 21:11:18,656 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 114 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:18,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1490 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1503 Invalid, 0 Unknown, 459 Unchecked, 0.5s Time] [2022-07-20 21:11:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-20 21:11:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-07-20 21:11:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0837004405286343) internal successors, (246), 227 states have internal predecessors, (246), 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 21:11:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 246 transitions. [2022-07-20 21:11:18,733 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 246 transitions. Word has length 146 [2022-07-20 21:11:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:18,733 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 246 transitions. [2022-07-20 21:11:18,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 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 21:11:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 246 transitions. [2022-07-20 21:11:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-20 21:11:18,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:18,734 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:18,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-20 21:11:18,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:18,942 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash -946172518, now seen corresponding path program 3 times [2022-07-20 21:11:18,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:18,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406010827] [2022-07-20 21:11:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:18,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:11:19,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:19,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406010827] [2022-07-20 21:11:19,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406010827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:19,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446392243] [2022-07-20 21:11:19,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:11:19,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:19,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:19,363 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:19,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-20 21:11:27,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-07-20 21:11:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:11:27,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 21:11:27,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:11:27,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-20 21:11:28,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446392243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:28,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:28,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2022-07-20 21:11:28,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348655415] [2022-07-20 21:11:28,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:28,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-20 21:11:28,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:28,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-20 21:11:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 21:11:28,932 INFO L87 Difference]: Start difference. First operand 228 states and 246 transitions. Second operand has 73 states, 73 states have (on average 3.1095890410958904) internal successors, (227), 73 states have internal predecessors, (227), 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 21:11:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:29,943 INFO L93 Difference]: Finished difference Result 780 states and 872 transitions. [2022-07-20 21:11:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-20 21:11:29,943 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.1095890410958904) internal successors, (227), 73 states have internal predecessors, (227), 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 147 [2022-07-20 21:11:29,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:29,945 INFO L225 Difference]: With dead ends: 780 [2022-07-20 21:11:29,945 INFO L226 Difference]: Without dead ends: 696 [2022-07-20 21:11:29,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 21:11:29,945 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1294 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:29,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 286 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 21:11:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-07-20 21:11:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 336. [2022-07-20 21:11:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.164179104477612) internal successors, (390), 335 states have internal predecessors, (390), 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 21:11:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 390 transitions. [2022-07-20 21:11:30,018 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 390 transitions. Word has length 147 [2022-07-20 21:11:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:30,018 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 390 transitions. [2022-07-20 21:11:30,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.1095890410958904) internal successors, (227), 73 states have internal predecessors, (227), 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 21:11:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 390 transitions. [2022-07-20 21:11:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 21:11:30,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:30,019 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:30,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-20 21:11:30,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-20 21:11:30,231 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash 555769454, now seen corresponding path program 49 times [2022-07-20 21:11:30,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:30,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984039050] [2022-07-20 21:11:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:30,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:31,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:31,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984039050] [2022-07-20 21:11:31,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984039050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366276172] [2022-07-20 21:11:31,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:11:31,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:31,024 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:31,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-20 21:11:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:31,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-20 21:11:31,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:31,301 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 15 treesize of output 11 [2022-07-20 21:11:31,368 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:11:31,368 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 27 treesize of output 26 [2022-07-20 21:11:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:32,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:32,450 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 16 treesize of output 14 [2022-07-20 21:11:32,452 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 24 [2022-07-20 21:11:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:32,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366276172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:32,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:32,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 46] total 68 [2022-07-20 21:11:32,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819116216] [2022-07-20 21:11:32,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:32,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 21:11:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 21:11:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4337, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 21:11:32,562 INFO L87 Difference]: Start difference. First operand 336 states and 390 transitions. Second operand has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 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 21:11:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:35,507 INFO L93 Difference]: Finished difference Result 437 states and 490 transitions. [2022-07-20 21:11:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-20 21:11:35,508 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 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 149 [2022-07-20 21:11:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:35,509 INFO L225 Difference]: With dead ends: 437 [2022-07-20 21:11:35,509 INFO L226 Difference]: Without dead ends: 435 [2022-07-20 21:11:35,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 269 SyntacticMatches, 7 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3790 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=591, Invalid=16439, Unknown=0, NotChecked=0, Total=17030 [2022-07-20 21:11:35,510 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 180 mSDsluCounter, 2448 mSDsCounter, 0 mSdLazyCounter, 5415 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2503 SdHoareTripleChecker+Invalid, 5684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 5415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:35,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2503 Invalid, 5684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 5415 Invalid, 0 Unknown, 43 Unchecked, 1.6s Time] [2022-07-20 21:11:35,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-07-20 21:11:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 341. [2022-07-20 21:11:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.161764705882353) internal successors, (395), 340 states have internal predecessors, (395), 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 21:11:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 395 transitions. [2022-07-20 21:11:35,593 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 395 transitions. Word has length 149 [2022-07-20 21:11:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:35,593 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 395 transitions. [2022-07-20 21:11:35,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 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 21:11:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 395 transitions. [2022-07-20 21:11:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-20 21:11:35,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:35,594 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:35,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-20 21:11:35,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-20 21:11:35,796 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 864618586, now seen corresponding path program 50 times [2022-07-20 21:11:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:35,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682076560] [2022-07-20 21:11:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:36,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:36,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682076560] [2022-07-20 21:11:36,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682076560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:36,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425330978] [2022-07-20 21:11:36,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:11:36,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:36,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:36,650 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:36,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-20 21:11:36,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:11:36,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:11:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-20 21:11:36,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:36,926 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 15 treesize of output 11 [2022-07-20 21:11:36,963 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:11:36,963 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 25 treesize of output 24 [2022-07-20 21:11:37,008 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:11:37,009 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 25 treesize of output 24 [2022-07-20 21:11:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 2 proven. 1435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:37,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:38,138 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 16 treesize of output 14 [2022-07-20 21:11:38,140 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 24 [2022-07-20 21:11:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1436 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:11:38,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425330978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:38,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:38,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 47] total 69 [2022-07-20 21:11:38,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721501349] [2022-07-20 21:11:38,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:38,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-20 21:11:38,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-20 21:11:38,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4467, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 21:11:38,251 INFO L87 Difference]: Start difference. First operand 341 states and 395 transitions. Second operand has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 states have internal predecessors, (240), 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 21:11:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:40,829 INFO L93 Difference]: Finished difference Result 432 states and 485 transitions. [2022-07-20 21:11:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-20 21:11:40,829 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 states have internal predecessors, (240), 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 152 [2022-07-20 21:11:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:40,830 INFO L225 Difference]: With dead ends: 432 [2022-07-20 21:11:40,830 INFO L226 Difference]: Without dead ends: 430 [2022-07-20 21:11:40,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 274 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=512, Invalid=12370, Unknown=0, NotChecked=0, Total=12882 [2022-07-20 21:11:40,831 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 174 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 5385 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2350 SdHoareTripleChecker+Invalid, 5589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 5385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:40,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2350 Invalid, 5589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 5385 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 21:11:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-07-20 21:11:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 340. [2022-07-20 21:11:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.1622418879056047) internal successors, (394), 339 states have internal predecessors, (394), 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 21:11:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 394 transitions. [2022-07-20 21:11:40,926 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 394 transitions. Word has length 152 [2022-07-20 21:11:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:40,926 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 394 transitions. [2022-07-20 21:11:40,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 states have internal predecessors, (240), 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 21:11:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 394 transitions. [2022-07-20 21:11:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-20 21:11:40,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:40,927 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:40,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-20 21:11:41,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:41,128 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash -860430556, now seen corresponding path program 51 times [2022-07-20 21:11:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:41,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861355394] [2022-07-20 21:11:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:41,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:41,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861355394] [2022-07-20 21:11:41,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861355394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:41,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520824590] [2022-07-20 21:11:41,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:11:41,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:41,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:41,934 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:41,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-20 21:11:46,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-20 21:11:46,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:11:46,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 21:11:46,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:47,549 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 15 treesize of output 11 [2022-07-20 21:11:49,395 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:11:49,396 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 44 treesize of output 23 [2022-07-20 21:11:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 780 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:49,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:51,672 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 21:11:51,674 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 28 [2022-07-20 21:11:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 760 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:51,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520824590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:51,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:51,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 117 [2022-07-20 21:11:51,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781645695] [2022-07-20 21:11:51,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:51,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-07-20 21:11:51,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-07-20 21:11:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=12099, Unknown=0, NotChecked=0, Total=13572 [2022-07-20 21:11:51,728 INFO L87 Difference]: Start difference. First operand 340 states and 394 transitions. Second operand has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 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 21:11:55,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:11:55,890 INFO L93 Difference]: Finished difference Result 429 states and 483 transitions. [2022-07-20 21:11:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-20 21:11:55,891 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 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 153 [2022-07-20 21:11:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:11:55,892 INFO L225 Difference]: With dead ends: 429 [2022-07-20 21:11:55,892 INFO L226 Difference]: Without dead ends: 341 [2022-07-20 21:11:55,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7440 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3485, Invalid=36715, Unknown=0, NotChecked=0, Total=40200 [2022-07-20 21:11:55,894 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 100 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 702 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:11:55,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1446 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1576 Invalid, 0 Unknown, 702 Unchecked, 0.5s Time] [2022-07-20 21:11:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-20 21:11:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2022-07-20 21:11:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.1592920353982301) internal successors, (393), 339 states have internal predecessors, (393), 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 21:11:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 393 transitions. [2022-07-20 21:11:55,986 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 393 transitions. Word has length 153 [2022-07-20 21:11:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:11:55,986 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 393 transitions. [2022-07-20 21:11:55,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 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 21:11:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 393 transitions. [2022-07-20 21:11:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 21:11:55,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:11:55,987 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:11:56,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-20 21:11:56,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:56,196 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:11:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:11:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -979324144, now seen corresponding path program 52 times [2022-07-20 21:11:56,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:11:56,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898574215] [2022-07-20 21:11:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:11:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:11:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:11:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:57,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:11:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898574215] [2022-07-20 21:11:57,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898574215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:11:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37992815] [2022-07-20 21:11:57,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:11:57,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:11:57,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:11:57,077 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:11:57,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-20 21:11:57,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:11:57,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:11:57,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-20 21:11:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:11:57,373 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 15 treesize of output 11 [2022-07-20 21:11:57,446 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:11:57,446 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 27 treesize of output 26 [2022-07-20 21:11:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:58,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:11:58,663 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 16 treesize of output 14 [2022-07-20 21:11:58,664 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 24 [2022-07-20 21:11:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:11:58,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37992815] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:11:58,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:11:58,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 71 [2022-07-20 21:11:58,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302076698] [2022-07-20 21:11:58,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:11:58,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 21:11:58,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:11:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 21:11:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4741, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 21:11:58,784 INFO L87 Difference]: Start difference. First operand 340 states and 393 transitions. Second operand has 71 states, 71 states have (on average 3.464788732394366) internal successors, (246), 71 states have internal predecessors, (246), 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 21:12:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:12:02,073 INFO L93 Difference]: Finished difference Result 445 states and 497 transitions. [2022-07-20 21:12:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-07-20 21:12:02,074 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.464788732394366) internal successors, (246), 71 states have internal predecessors, (246), 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 156 [2022-07-20 21:12:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:12:02,075 INFO L225 Difference]: With dead ends: 445 [2022-07-20 21:12:02,075 INFO L226 Difference]: Without dead ends: 443 [2022-07-20 21:12:02,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 282 SyntacticMatches, 7 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=618, Invalid=18014, Unknown=0, NotChecked=0, Total=18632 [2022-07-20 21:12:02,076 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 188 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 5661 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 2648 SdHoareTripleChecker+Invalid, 6017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 5661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:12:02,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 2648 Invalid, 6017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 5661 Invalid, 0 Unknown, 117 Unchecked, 1.8s Time] [2022-07-20 21:12:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-20 21:12:02,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 345. [2022-07-20 21:12:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.1569767441860466) internal successors, (398), 344 states have internal predecessors, (398), 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 21:12:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 398 transitions. [2022-07-20 21:12:02,184 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 398 transitions. Word has length 156 [2022-07-20 21:12:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:12:02,184 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 398 transitions. [2022-07-20 21:12:02,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.464788732394366) internal successors, (246), 71 states have internal predecessors, (246), 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 21:12:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 398 transitions. [2022-07-20 21:12:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-20 21:12:02,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:12:02,185 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:12:02,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-20 21:12:02,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:12:02,404 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:12:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:12:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash 409814948, now seen corresponding path program 53 times [2022-07-20 21:12:02,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:12:02,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9426954] [2022-07-20 21:12:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:12:02,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:12:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:03,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:12:03,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9426954] [2022-07-20 21:12:03,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9426954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:12:03,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317954011] [2022-07-20 21:12:03,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:12:03,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:12:03,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:12:03,363 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:12:03,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-20 21:12:04,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-20 21:12:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:12:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-20 21:12:04,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:12:04,818 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 15 treesize of output 11 [2022-07-20 21:12:04,858 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:12:04,858 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 25 treesize of output 24 [2022-07-20 21:12:04,903 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:12:04,904 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 25 treesize of output 24 [2022-07-20 21:12:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 2 proven. 1580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:05,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:12:06,138 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 16 treesize of output 14 [2022-07-20 21:12:06,140 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 24 [2022-07-20 21:12:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1581 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:12:06,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317954011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:12:06,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:12:06,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 49] total 72 [2022-07-20 21:12:06,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016483974] [2022-07-20 21:12:06,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:12:06,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-20 21:12:06,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:12:06,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-20 21:12:06,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=4877, Unknown=0, NotChecked=0, Total=5112 [2022-07-20 21:12:06,258 INFO L87 Difference]: Start difference. First operand 345 states and 398 transitions. Second operand has 72 states, 72 states have (on average 3.486111111111111) internal successors, (251), 72 states have internal predecessors, (251), 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 21:12:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:12:09,156 INFO L93 Difference]: Finished difference Result 440 states and 492 transitions. [2022-07-20 21:12:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-20 21:12:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.486111111111111) internal successors, (251), 72 states have internal predecessors, (251), 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 159 [2022-07-20 21:12:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:12:09,157 INFO L225 Difference]: With dead ends: 440 [2022-07-20 21:12:09,157 INFO L226 Difference]: Without dead ends: 438 [2022-07-20 21:12:09,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 287 SyntacticMatches, 9 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=534, Invalid=13508, Unknown=0, NotChecked=0, Total=14042 [2022-07-20 21:12:09,158 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 133 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 6039 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 2551 SdHoareTripleChecker+Invalid, 6203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 6039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:12:09,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 2551 Invalid, 6203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 6039 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 21:12:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-07-20 21:12:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 344. [2022-07-20 21:12:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.1574344023323615) internal successors, (397), 343 states have internal predecessors, (397), 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 21:12:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 397 transitions. [2022-07-20 21:12:09,259 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 397 transitions. Word has length 159 [2022-07-20 21:12:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:12:09,260 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 397 transitions. [2022-07-20 21:12:09,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.486111111111111) internal successors, (251), 72 states have internal predecessors, (251), 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 21:12:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 397 transitions. [2022-07-20 21:12:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-20 21:12:09,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:12:09,260 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:12:09,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-20 21:12:09,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-20 21:12:09,461 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:12:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:12:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash -640150842, now seen corresponding path program 54 times [2022-07-20 21:12:09,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:12:09,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209438541] [2022-07-20 21:12:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:12:09,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:12:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:10,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:12:10,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209438541] [2022-07-20 21:12:10,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209438541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:12:10,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119612643] [2022-07-20 21:12:10,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:12:10,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:12:10,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:12:10,342 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:12:10,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-20 21:12:12,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-07-20 21:12:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:12:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 21:12:12,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:12:12,861 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 15 treesize of output 11 [2022-07-20 21:12:14,857 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:12:14,858 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 44 treesize of output 23 [2022-07-20 21:12:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 861 proven. 736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:14,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:12:17,289 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 21:12:17,293 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 28 [2022-07-20 21:12:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 840 proven. 757 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:17,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119612643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:12:17,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:12:17,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 122 [2022-07-20 21:12:17,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041380910] [2022-07-20 21:12:17,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:12:17,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-20 21:12:17,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:12:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-20 21:12:17,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=13166, Unknown=0, NotChecked=0, Total=14762 [2022-07-20 21:12:17,348 INFO L87 Difference]: Start difference. First operand 344 states and 397 transitions. Second operand has 122 states, 122 states have (on average 3.3114754098360657) internal successors, (404), 122 states have internal predecessors, (404), 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 21:12:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:12:21,884 INFO L93 Difference]: Finished difference Result 437 states and 490 transitions. [2022-07-20 21:12:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-07-20 21:12:21,885 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.3114754098360657) internal successors, (404), 122 states have internal predecessors, (404), 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 160 [2022-07-20 21:12:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:12:21,886 INFO L225 Difference]: With dead ends: 437 [2022-07-20 21:12:21,886 INFO L226 Difference]: Without dead ends: 345 [2022-07-20 21:12:21,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3770, Invalid=40120, Unknown=0, NotChecked=0, Total=43890 [2022-07-20 21:12:21,888 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 150 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 806 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:12:21,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1588 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1875 Invalid, 0 Unknown, 806 Unchecked, 0.6s Time] [2022-07-20 21:12:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-20 21:12:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 344. [2022-07-20 21:12:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.154518950437318) internal successors, (396), 343 states have internal predecessors, (396), 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 21:12:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 396 transitions. [2022-07-20 21:12:21,991 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 396 transitions. Word has length 160 [2022-07-20 21:12:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:12:21,991 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 396 transitions. [2022-07-20 21:12:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.3114754098360657) internal successors, (404), 122 states have internal predecessors, (404), 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 21:12:21,991 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 396 transitions. [2022-07-20 21:12:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-20 21:12:21,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:12:21,992 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:12:21,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-20 21:12:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-20 21:12:22,193 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:12:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:12:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash 341851482, now seen corresponding path program 55 times [2022-07-20 21:12:22,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:12:22,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320839000] [2022-07-20 21:12:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:12:22,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:12:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:23,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:12:23,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320839000] [2022-07-20 21:12:23,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320839000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:12:23,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715602046] [2022-07-20 21:12:23,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:12:23,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:12:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:12:23,121 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:12:23,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-20 21:12:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-20 21:12:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:12:23,428 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 15 treesize of output 11 [2022-07-20 21:12:23,494 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:12:23,495 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 27 treesize of output 26 [2022-07-20 21:12:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:24,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:12:24,804 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 16 treesize of output 14 [2022-07-20 21:12:24,806 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 24 [2022-07-20 21:12:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:24,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715602046] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:12:24,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:12:24,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 74 [2022-07-20 21:12:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642653272] [2022-07-20 21:12:24,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:12:24,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-20 21:12:24,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:12:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-20 21:12:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=5163, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 21:12:24,969 INFO L87 Difference]: Start difference. First operand 344 states and 396 transitions. Second operand has 74 states, 74 states have (on average 3.472972972972973) internal successors, (257), 74 states have internal predecessors, (257), 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 21:12:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:12:28,428 INFO L93 Difference]: Finished difference Result 453 states and 504 transitions. [2022-07-20 21:12:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-07-20 21:12:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.472972972972973) internal successors, (257), 74 states have internal predecessors, (257), 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 163 [2022-07-20 21:12:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:12:28,430 INFO L225 Difference]: With dead ends: 453 [2022-07-20 21:12:28,430 INFO L226 Difference]: Without dead ends: 451 [2022-07-20 21:12:28,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4518 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=645, Invalid=19661, Unknown=0, NotChecked=0, Total=20306 [2022-07-20 21:12:28,431 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 198 mSDsluCounter, 2857 mSDsCounter, 0 mSdLazyCounter, 6013 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 6309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 6013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:12:28,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 2916 Invalid, 6309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 6013 Invalid, 0 Unknown, 47 Unchecked, 1.8s Time] [2022-07-20 21:12:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-20 21:12:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 349. [2022-07-20 21:12:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.1522988505747127) internal successors, (401), 348 states have internal predecessors, (401), 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 21:12:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 401 transitions. [2022-07-20 21:12:28,537 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 401 transitions. Word has length 163 [2022-07-20 21:12:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:12:28,537 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 401 transitions. [2022-07-20 21:12:28,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.472972972972973) internal successors, (257), 74 states have internal predecessors, (257), 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 21:12:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 401 transitions. [2022-07-20 21:12:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-20 21:12:28,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:12:28,538 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:12:28,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-20 21:12:28,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:12:28,745 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:12:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:12:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2144134586, now seen corresponding path program 56 times [2022-07-20 21:12:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:12:28,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118311365] [2022-07-20 21:12:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:12:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:12:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:12:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:29,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:12:29,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118311365] [2022-07-20 21:12:29,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118311365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:12:29,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463852560] [2022-07-20 21:12:29,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:12:29,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:12:29,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:12:29,726 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:12:29,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-20 21:12:29,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:12:29,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:12:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-20 21:12:29,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:12:30,065 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 15 treesize of output 11 [2022-07-20 21:12:30,106 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:12:30,106 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 25 treesize of output 24 [2022-07-20 21:12:30,154 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:12:30,154 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 25 treesize of output 24 [2022-07-20 21:12:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 2 proven. 1732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:12:31,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:12:31,500 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 16 treesize of output 14 [2022-07-20 21:12:31,503 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 24 [2022-07-20 21:12:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1733 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:12:31,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463852560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:12:31,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:12:31,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 75 [2022-07-20 21:12:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794654211] [2022-07-20 21:12:31,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:12:31,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-20 21:12:31,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:12:31,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-20 21:12:31,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=5305, Unknown=0, NotChecked=0, Total=5550 [2022-07-20 21:12:31,627 INFO L87 Difference]: Start difference. First operand 349 states and 401 transitions. Second operand has 75 states, 75 states have (on average 3.493333333333333) internal successors, (262), 75 states have internal predecessors, (262), 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)