./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pr5.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/pr5.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 374c198ea90130277bd1a124bc94571dd240bc0803e6f3936a68065c719ddd5a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:13:08,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:13:08,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:13:08,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:13:08,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:13:08,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:13:08,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:13:08,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:13:08,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:13:08,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:13:08,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:13:08,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:13:08,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:13:08,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:13:08,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:13:08,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:13:08,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:13:08,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:13:08,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:13:08,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:13:08,137 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:13:08,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:13:08,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:13:08,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:13:08,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:13:08,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:13:08,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:13:08,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:13:08,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:13:08,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:13:08,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:13:08,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:13:08,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:13:08,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:13:08,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:13:08,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:13:08,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:13:08,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:13:08,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:13:08,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:13:08,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:13:08,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:13:08,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:13:08,192 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:13:08,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:13:08,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:13:08,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:13:08,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:13:08,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:13:08,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:13:08,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:13:08,195 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:13:08,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:13:08,195 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:13:08,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:13:08,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:13:08,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:13:08,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:13:08,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:13:08,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:13:08,196 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:13:08,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:13:08,197 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:13:08,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:13:08,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:13:08,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:13:08,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:13:08,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:13:08,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:13:08,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:13:08,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:13:08,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:13:08,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:13:08,199 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:13:08,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:13:08,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:13:08,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 374c198ea90130277bd1a124bc94571dd240bc0803e6f3936a68065c719ddd5a [2022-07-20 21:13:08,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:13:08,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:13:08,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:13:08,399 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:13:08,400 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:13:08,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr5.c [2022-07-20 21:13:08,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a9dc93c/cf54e2c4d5b74dd7b94374f73bf5605a/FLAGf8a7d0806 [2022-07-20 21:13:08,854 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:13:08,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c [2022-07-20 21:13:08,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a9dc93c/cf54e2c4d5b74dd7b94374f73bf5605a/FLAGf8a7d0806 [2022-07-20 21:13:08,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a9dc93c/cf54e2c4d5b74dd7b94374f73bf5605a [2022-07-20 21:13:08,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:13:08,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:13:08,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:13:08,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:13:08,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:13:08,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:08" (1/1) ... [2022-07-20 21:13:08,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45420ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:08, skipping insertion in model container [2022-07-20 21:13:08,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:08" (1/1) ... [2022-07-20 21:13:08,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:13:08,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:13:08,990 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/pr5.c[394,407] [2022-07-20 21:13:09,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:13:09,011 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:13:09,018 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/pr5.c[394,407] [2022-07-20 21:13:09,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:13:09,033 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:13:09,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09 WrapperNode [2022-07-20 21:13:09,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:13:09,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:13:09,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:13:09,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:13:09,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,066 INFO L137 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2022-07-20 21:13:09,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:13:09,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:13:09,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:13:09,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:13:09,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:13:09,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:13:09,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:13:09,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:13:09,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (1/1) ... [2022-07-20 21:13:09,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:13:09,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:09,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:13:09,129 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 21:13:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:13:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:13:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:13:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:13:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:13:09,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:13:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:13:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:13:09,192 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:13:09,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:13:09,367 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:13:09,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:13:09,370 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:13:09,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:09 BoogieIcfgContainer [2022-07-20 21:13:09,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:13:09,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:13:09,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:13:09,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:13:09,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:13:08" (1/3) ... [2022-07-20 21:13:09,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a94b812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:09, skipping insertion in model container [2022-07-20 21:13:09,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:09" (2/3) ... [2022-07-20 21:13:09,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a94b812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:09, skipping insertion in model container [2022-07-20 21:13:09,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:09" (3/3) ... [2022-07-20 21:13:09,377 INFO L111 eAbstractionObserver]: Analyzing ICFG pr5.c [2022-07-20 21:13:09,390 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:13:09,390 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:13:09,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:13:09,479 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@3e6e04bb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4310535e [2022-07-20 21:13:09,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:13:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 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 21:13:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 21:13:09,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:09,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:09,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash -50963655, now seen corresponding path program 1 times [2022-07-20 21:13:09,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:09,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042348984] [2022-07-20 21:13:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:09,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:09,641 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 21:13:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042348984] [2022-07-20 21:13:09,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042348984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:09,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:09,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:13:09,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398878883] [2022-07-20 21:13:09,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:09,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:13:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:09,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:13:09,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:13:09,672 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:09,686 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2022-07-20 21:13:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:13:09,688 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:09,696 INFO L225 Difference]: With dead ends: 49 [2022-07-20 21:13:09,696 INFO L226 Difference]: Without dead ends: 22 [2022-07-20 21:13:09,699 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 21:13:09,704 INFO L413 NwaCegarLoop]: 36 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, 36 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 21:13:09,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-20 21:13:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-20 21:13:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 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 21:13:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-07-20 21:13:09,729 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 13 [2022-07-20 21:13:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:09,729 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-07-20 21:13:09,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-07-20 21:13:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 21:13:09,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:09,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:09,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:13:09,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 629094715, now seen corresponding path program 1 times [2022-07-20 21:13:09,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:09,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128198584] [2022-07-20 21:13:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:09,810 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 21:13:09,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:09,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128198584] [2022-07-20 21:13:09,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128198584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:09,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:09,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:13:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952856333] [2022-07-20 21:13:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:09,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:13:09,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:13:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:13:09,814 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:09,851 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-07-20 21:13:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:13:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:09,853 INFO L225 Difference]: With dead ends: 31 [2022-07-20 21:13:09,854 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:13:09,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:13:09,858 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:09,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:13:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-07-20 21:13:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 21:13:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-07-20 21:13:09,865 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2022-07-20 21:13:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:09,866 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-20 21:13:09,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-07-20 21:13:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 21:13:09,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:09,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:09,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:13:09,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash 629154297, now seen corresponding path program 1 times [2022-07-20 21:13:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:09,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049060423] [2022-07-20 21:13:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:09,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:09,977 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 21:13:09,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:09,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049060423] [2022-07-20 21:13:09,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049060423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:09,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:09,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 21:13:09,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338354620] [2022-07-20 21:13:09,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:09,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 21:13:09,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:09,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 21:13:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:13:09,980 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:10,051 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-07-20 21:13:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:13:10,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:10,052 INFO L225 Difference]: With dead ends: 42 [2022-07-20 21:13:10,052 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 21:13:10,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:13:10,053 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:10,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:13:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 21:13:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-07-20 21:13:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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 21:13:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-07-20 21:13:10,059 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-07-20 21:13:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:10,059 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-07-20 21:13:10,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:13:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-07-20 21:13:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 21:13:10,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:10,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:10,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 21:13:10,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash 314139906, now seen corresponding path program 1 times [2022-07-20 21:13:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:10,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848126064] [2022-07-20 21:13:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:10,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:10,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848126064] [2022-07-20 21:13:10,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848126064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:10,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:10,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:13:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866281561] [2022-07-20 21:13:10,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:10,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:13:10,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:10,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:13:10,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:13:10,126 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 21:13:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:10,207 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2022-07-20 21:13:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:13:10,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 21:13:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:10,208 INFO L225 Difference]: With dead ends: 61 [2022-07-20 21:13:10,208 INFO L226 Difference]: Without dead ends: 43 [2022-07-20 21:13:10,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:13:10,209 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:10,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:13:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-20 21:13:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2022-07-20 21:13:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 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 21:13:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-07-20 21:13:10,213 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 20 [2022-07-20 21:13:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:10,214 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-07-20 21:13:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 21:13:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-07-20 21:13:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 21:13:10,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:10,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:10,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 21:13:10,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash 994198276, now seen corresponding path program 1 times [2022-07-20 21:13:10,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:10,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233881753] [2022-07-20 21:13:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:10,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:10,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233881753] [2022-07-20 21:13:10,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233881753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:10,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:10,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:13:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290526434] [2022-07-20 21:13:10,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:10,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:13:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:10,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:13:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:13:10,267 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 21:13:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:10,311 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2022-07-20 21:13:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:13:10,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 21:13:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:10,312 INFO L225 Difference]: With dead ends: 78 [2022-07-20 21:13:10,313 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 21:13:10,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:13:10,314 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:10,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 21:13:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2022-07-20 21:13:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:13:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-07-20 21:13:10,322 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 20 [2022-07-20 21:13:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:10,323 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-07-20 21:13:10,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 21:13:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-07-20 21:13:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 21:13:10,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:10,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:10,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 21:13:10,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:10,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash 707166916, now seen corresponding path program 1 times [2022-07-20 21:13:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:10,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819782145] [2022-07-20 21:13:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:10,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:10,496 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 21:13:10,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:10,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819782145] [2022-07-20 21:13:10,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819782145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:10,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908715768] [2022-07-20 21:13:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:10,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:10,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:10,507 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 21:13:10,531 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 21:13:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:10,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:13:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:10,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:10,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:10,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:10,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:10,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:10,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:10,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:10,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:10,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 21:13:10,853 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 21:13:10,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:11,026 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 21:13:11,036 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 168 treesize of output 164 [2022-07-20 21:13:11,101 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 21:13:11,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908715768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:11,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:11,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-07-20 21:13:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860112858] [2022-07-20 21:13:11,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:11,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 21:13:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 21:13:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:13:11,104 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 21:13:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:11,608 INFO L93 Difference]: Finished difference Result 144 states and 189 transitions. [2022-07-20 21:13:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:13:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 21:13:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:11,609 INFO L225 Difference]: With dead ends: 144 [2022-07-20 21:13:11,610 INFO L226 Difference]: Without dead ends: 126 [2022-07-20 21:13:11,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 21:13:11,611 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 264 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:11,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 143 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 323 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-07-20 21:13:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-20 21:13:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 61. [2022-07-20 21:13:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 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 21:13:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2022-07-20 21:13:11,617 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 20 [2022-07-20 21:13:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:11,617 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2022-07-20 21:13:11,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 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 21:13:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2022-07-20 21:13:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 21:13:11,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:11,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:11,635 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 21:13:11,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-20 21:13:11,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash 407392262, now seen corresponding path program 1 times [2022-07-20 21:13:11,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:11,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224323313] [2022-07-20 21:13:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:11,978 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 21:13:11,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:11,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224323313] [2022-07-20 21:13:11,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224323313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:11,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951319266] [2022-07-20 21:13:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:11,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:11,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:11,980 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 21:13:11,981 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 21:13:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:12,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:13:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:12,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:12,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:12,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:12,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:12,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:12,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:12,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:12,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-07-20 21:13:12,144 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 21:13:12,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:12,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-20 21:13:12,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-20 21:13:12,231 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 21:13:12,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951319266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:12,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:12,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 13 [2022-07-20 21:13:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427443] [2022-07-20 21:13:12,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:12,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 21:13:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 21:13:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:13:12,233 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 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 21:13:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:12,532 INFO L93 Difference]: Finished difference Result 130 states and 170 transitions. [2022-07-20 21:13:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:13:12,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 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 21:13:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:12,533 INFO L225 Difference]: With dead ends: 130 [2022-07-20 21:13:12,533 INFO L226 Difference]: Without dead ends: 128 [2022-07-20 21:13:12,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:13:12,534 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:12,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 116 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:13:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-20 21:13:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2022-07-20 21:13:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 0 states have call successors, (0), 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 21:13:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2022-07-20 21:13:12,541 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 20 [2022-07-20 21:13:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:12,541 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 90 transitions. [2022-07-20 21:13:12,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 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 21:13:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 90 transitions. [2022-07-20 21:13:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 21:13:12,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:12,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:12,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:13:12,765 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,SelfDestructingSolverStorable6 [2022-07-20 21:13:12,766 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1616202537, now seen corresponding path program 1 times [2022-07-20 21:13:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:12,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817790008] [2022-07-20 21:13:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:12,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:12,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817790008] [2022-07-20 21:13:12,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817790008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:12,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311077474] [2022-07-20 21:13:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:12,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:12,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:12,963 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 21:13:12,964 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 21:13:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:13:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:13,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:13,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:13,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:13,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:13,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:13:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:13,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:13,326 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 25 treesize of output 23 [2022-07-20 21:13:13,328 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 88 treesize of output 84 [2022-07-20 21:13:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:13,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311077474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:13,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:13,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-07-20 21:13:13,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735595988] [2022-07-20 21:13:13,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:13,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:13:13,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:13:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:13:13,378 INFO L87 Difference]: Start difference. First operand 64 states and 90 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 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 21:13:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:14,050 INFO L93 Difference]: Finished difference Result 361 states and 505 transitions. [2022-07-20 21:13:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:13:14,051 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 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 26 [2022-07-20 21:13:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:14,053 INFO L225 Difference]: With dead ends: 361 [2022-07-20 21:13:14,053 INFO L226 Difference]: Without dead ends: 314 [2022-07-20 21:13:14,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:13:14,054 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 316 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:14,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 162 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 439 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-07-20 21:13:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-20 21:13:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 135. [2022-07-20 21:13:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.4477611940298507) internal successors, (194), 134 states have internal predecessors, (194), 0 states have call successors, (0), 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 21:13:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 194 transitions. [2022-07-20 21:13:14,065 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 194 transitions. Word has length 26 [2022-07-20 21:13:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:14,066 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 194 transitions. [2022-07-20 21:13:14,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 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 21:13:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 194 transitions. [2022-07-20 21:13:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 21:13:14,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:14,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:14,087 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 21:13:14,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:14,279 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:14,280 INFO L85 PathProgramCache]: Analyzing trace with hash 684620053, now seen corresponding path program 1 times [2022-07-20 21:13:14,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:14,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963410434] [2022-07-20 21:13:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:13:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963410434] [2022-07-20 21:13:14,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963410434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:14,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:14,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:13:14,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418770421] [2022-07-20 21:13:14,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:14,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:13:14,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:13:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:13:14,314 INFO L87 Difference]: Start difference. First operand 135 states and 194 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 21:13:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:14,343 INFO L93 Difference]: Finished difference Result 192 states and 271 transitions. [2022-07-20 21:13:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:13:14,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 26 [2022-07-20 21:13:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:14,345 INFO L225 Difference]: With dead ends: 192 [2022-07-20 21:13:14,346 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 21:13:14,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:13:14,348 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:14,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 21:13:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2022-07-20 21:13:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 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 21:13:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2022-07-20 21:13:14,371 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 26 [2022-07-20 21:13:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:14,371 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2022-07-20 21:13:14,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 21:13:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2022-07-20 21:13:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 21:13:14,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:14,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:14,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 21:13:14,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:14,377 INFO L85 PathProgramCache]: Analyzing trace with hash -595243625, now seen corresponding path program 1 times [2022-07-20 21:13:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:14,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346065778] [2022-07-20 21:13:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:14,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:13:14,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:14,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346065778] [2022-07-20 21:13:14,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346065778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:14,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:14,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:13:14,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289575654] [2022-07-20 21:13:14,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:14,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:13:14,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:13:14,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:13:14,419 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 21:13:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:14,444 INFO L93 Difference]: Finished difference Result 154 states and 203 transitions. [2022-07-20 21:13:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:13:14,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 26 [2022-07-20 21:13:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:14,445 INFO L225 Difference]: With dead ends: 154 [2022-07-20 21:13:14,446 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 21:13:14,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:13:14,447 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:14,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 21:13:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2022-07-20 21:13:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 108 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 21:13:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2022-07-20 21:13:14,457 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 26 [2022-07-20 21:13:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:14,457 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2022-07-20 21:13:14,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 21:13:14,457 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2022-07-20 21:13:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 21:13:14,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:14,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:14,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 21:13:14,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 989711575, now seen corresponding path program 1 times [2022-07-20 21:13:14,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732623637] [2022-07-20 21:13:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:14,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:14,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:14,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732623637] [2022-07-20 21:13:14,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732623637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984459169] [2022-07-20 21:13:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:14,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:14,592 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 21:13:14,592 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 21:13:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:14,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:13:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:14,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:14,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:14,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:14,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:14,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:14,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:14,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-07-20 21:13:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:14,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:14,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:13:14,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:13:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:14,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984459169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:14,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:14,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-07-20 21:13:14,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898949742] [2022-07-20 21:13:14,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:14,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:13:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:14,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:13:14,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:13:14,816 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 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 21:13:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:15,226 INFO L93 Difference]: Finished difference Result 248 states and 321 transitions. [2022-07-20 21:13:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 21:13:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 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 26 [2022-07-20 21:13:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:15,227 INFO L225 Difference]: With dead ends: 248 [2022-07-20 21:13:15,227 INFO L226 Difference]: Without dead ends: 246 [2022-07-20 21:13:15,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:13:15,228 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:15,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 139 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:13:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-20 21:13:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 130. [2022-07-20 21:13:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3565891472868217) internal successors, (175), 129 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 21:13:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-07-20 21:13:15,234 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 26 [2022-07-20 21:13:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:15,235 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-07-20 21:13:15,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 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 21:13:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-07-20 21:13:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 21:13:15,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:15,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:15,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:13:15,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:15,450 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1583768663, now seen corresponding path program 1 times [2022-07-20 21:13:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:15,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200628640] [2022-07-20 21:13:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:15,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200628640] [2022-07-20 21:13:15,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200628640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:15,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:15,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:13:15,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786994267] [2022-07-20 21:13:15,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:15,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:13:15,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:15,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:13:15,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:13:15,492 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:13:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:15,509 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2022-07-20 21:13:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:13:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 21:13:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:15,510 INFO L225 Difference]: With dead ends: 162 [2022-07-20 21:13:15,510 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 21:13:15,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:13:15,513 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:15,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 21:13:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2022-07-20 21:13:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 110 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 21:13:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2022-07-20 21:13:15,519 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 27 [2022-07-20 21:13:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:15,519 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2022-07-20 21:13:15,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:13:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2022-07-20 21:13:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 21:13:15,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:15,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:15,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 21:13:15,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -958935894, now seen corresponding path program 2 times [2022-07-20 21:13:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085826566] [2022-07-20 21:13:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:15,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:15,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:15,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085826566] [2022-07-20 21:13:15,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085826566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:15,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254848998] [2022-07-20 21:13:15,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:13:15,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:15,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:15,636 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 21:13:15,637 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 21:13:15,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:13:15,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:13:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 21:13:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:15,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:15,745 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:15,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:15,755 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:13:15,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:13:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:16,064 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 51 treesize of output 47 [2022-07-20 21:13:16,068 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 175 treesize of output 167 [2022-07-20 21:13:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:16,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254848998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:16,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:16,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 28 [2022-07-20 21:13:16,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746161466] [2022-07-20 21:13:16,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:16,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-20 21:13:16,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-20 21:13:16,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-07-20 21:13:16,195 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 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 21:13:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:17,800 INFO L93 Difference]: Finished difference Result 451 states and 571 transitions. [2022-07-20 21:13:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-20 21:13:17,801 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 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 32 [2022-07-20 21:13:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:17,802 INFO L225 Difference]: With dead ends: 451 [2022-07-20 21:13:17,802 INFO L226 Difference]: Without dead ends: 415 [2022-07-20 21:13:17,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=884, Invalid=4518, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 21:13:17,804 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 506 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:17,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 136 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 546 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-07-20 21:13:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-20 21:13:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 163. [2022-07-20 21:13:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.2901234567901234) internal successors, (209), 162 states have internal predecessors, (209), 0 states have call successors, (0), 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 21:13:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 209 transitions. [2022-07-20 21:13:17,813 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 209 transitions. Word has length 32 [2022-07-20 21:13:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:17,813 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 209 transitions. [2022-07-20 21:13:17,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 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 21:13:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 209 transitions. [2022-07-20 21:13:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 21:13:17,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:17,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:17,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 21:13:18,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:13:18,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1605606378, now seen corresponding path program 1 times [2022-07-20 21:13:18,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:18,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418266756] [2022-07-20 21:13:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:18,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:13:18,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:18,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418266756] [2022-07-20 21:13:18,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418266756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:18,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:18,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:13:18,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393684942] [2022-07-20 21:13:18,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:18,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:13:18,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:18,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:13:18,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:13:18,048 INFO L87 Difference]: Start difference. First operand 163 states and 209 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 21:13:18,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:18,074 INFO L93 Difference]: Finished difference Result 195 states and 245 transitions. [2022-07-20 21:13:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:13:18,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 33 [2022-07-20 21:13:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:18,075 INFO L225 Difference]: With dead ends: 195 [2022-07-20 21:13:18,075 INFO L226 Difference]: Without dead ends: 154 [2022-07-20 21:13:18,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:13:18,076 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:18,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-20 21:13:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 138. [2022-07-20 21:13:18,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.27007299270073) internal successors, (174), 137 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 21:13:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-07-20 21:13:18,083 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 33 [2022-07-20 21:13:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:18,084 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-07-20 21:13:18,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 21:13:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-07-20 21:13:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 21:13:18,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:18,084 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:18,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 21:13:18,085 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:18,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1633319485, now seen corresponding path program 3 times [2022-07-20 21:13:18,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:18,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258656467] [2022-07-20 21:13:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:18,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:18,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258656467] [2022-07-20 21:13:18,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258656467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:18,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808207558] [2022-07-20 21:13:18,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:13:18,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:18,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:18,214 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 21:13:18,215 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 21:13:18,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 21:13:18,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:13:18,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:13:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:18,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:18,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:18,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:13:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:18,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:18,707 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 25 treesize of output 23 [2022-07-20 21:13:18,709 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 88 treesize of output 84 [2022-07-20 21:13:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:18,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808207558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:18,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:18,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-07-20 21:13:18,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49311236] [2022-07-20 21:13:18,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:18,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:13:18,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:13:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:13:18,764 INFO L87 Difference]: Start difference. First operand 138 states and 174 transitions. Second operand has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 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 21:13:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:20,499 INFO L93 Difference]: Finished difference Result 505 states and 606 transitions. [2022-07-20 21:13:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 21:13:20,499 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 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 21:13:20,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:20,501 INFO L225 Difference]: With dead ends: 505 [2022-07-20 21:13:20,501 INFO L226 Difference]: Without dead ends: 495 [2022-07-20 21:13:20,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=986, Invalid=4866, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 21:13:20,502 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 425 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:20,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 279 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 962 Invalid, 0 Unknown, 106 Unchecked, 0.7s Time] [2022-07-20 21:13:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-07-20 21:13:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 168. [2022-07-20 21:13:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2455089820359282) internal successors, (208), 167 states have internal predecessors, (208), 0 states have call successors, (0), 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 21:13:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2022-07-20 21:13:20,514 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 38 [2022-07-20 21:13:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:20,514 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2022-07-20 21:13:20,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 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 21:13:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2022-07-20 21:13:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 21:13:20,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:20,515 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:20,532 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 21:13:20,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 21:13:20,724 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash -546292993, now seen corresponding path program 1 times [2022-07-20 21:13:20,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:20,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314764224] [2022-07-20 21:13:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:20,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:20,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:20,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314764224] [2022-07-20 21:13:20,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314764224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:20,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665980996] [2022-07-20 21:13:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:20,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:20,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:20,878 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 21:13:20,879 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 21:13:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:20,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:13:20,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:20,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:20,956 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:13:20,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:13:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:21,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:21,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:13:21,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:13:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:21,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665980996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:21,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:21,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-07-20 21:13:21,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611815661] [2022-07-20 21:13:21,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:21,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:13:21,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:21,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:13:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:13:21,138 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 0 states have call successors, (0), 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 21:13:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:22,448 INFO L93 Difference]: Finished difference Result 552 states and 661 transitions. [2022-07-20 21:13:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-20 21:13:22,448 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 0 states have call successors, (0), 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 21:13:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:22,450 INFO L225 Difference]: With dead ends: 552 [2022-07-20 21:13:22,450 INFO L226 Difference]: Without dead ends: 550 [2022-07-20 21:13:22,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1053, Invalid=6087, Unknown=0, NotChecked=0, Total=7140 [2022-07-20 21:13:22,452 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 285 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:22,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 252 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 21:13:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-20 21:13:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 200. [2022-07-20 21:13:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.2462311557788945) internal successors, (248), 199 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 21:13:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2022-07-20 21:13:22,466 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 38 [2022-07-20 21:13:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:22,467 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2022-07-20 21:13:22,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 0 states have call successors, (0), 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 21:13:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2022-07-20 21:13:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 21:13:22,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:22,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:22,491 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 21:13:22,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:22,683 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:22,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2003079792, now seen corresponding path program 4 times [2022-07-20 21:13:22,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:22,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219311809] [2022-07-20 21:13:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:22,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219311809] [2022-07-20 21:13:22,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219311809] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291779426] [2022-07-20 21:13:22,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:13:22,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:22,803 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 21:13:22,804 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 21:13:22,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:13:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:13:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:13:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:22,882 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 21:13:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:23,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:23,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:13:23,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:13:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:23,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291779426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:23,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:23,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 27 [2022-07-20 21:13:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392993037] [2022-07-20 21:13:23,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:23,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 21:13:23,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 21:13:23,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:13:23,226 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 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 21:13:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:24,757 INFO L93 Difference]: Finished difference Result 648 states and 768 transitions. [2022-07-20 21:13:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-20 21:13:24,757 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 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 44 [2022-07-20 21:13:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:24,758 INFO L225 Difference]: With dead ends: 648 [2022-07-20 21:13:24,759 INFO L226 Difference]: Without dead ends: 638 [2022-07-20 21:13:24,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1018, Invalid=6464, Unknown=0, NotChecked=0, Total=7482 [2022-07-20 21:13:24,760 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 395 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:24,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 235 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 21:13:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-07-20 21:13:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 224. [2022-07-20 21:13:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.2286995515695067) internal successors, (274), 223 states have internal predecessors, (274), 0 states have call successors, (0), 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 21:13:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 274 transitions. [2022-07-20 21:13:24,778 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 274 transitions. Word has length 44 [2022-07-20 21:13:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:24,778 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 274 transitions. [2022-07-20 21:13:24,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 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 21:13:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 274 transitions. [2022-07-20 21:13:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 21:13:24,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:24,779 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:24,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-20 21:13:24,994 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,SelfDestructingSolverStorable16 [2022-07-20 21:13:24,995 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2075466350, now seen corresponding path program 1 times [2022-07-20 21:13:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:24,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530103001] [2022-07-20 21:13:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:24,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:25,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:25,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530103001] [2022-07-20 21:13:25,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530103001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:25,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879354208] [2022-07-20 21:13:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:25,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:25,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:25,083 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 21:13:25,083 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 21:13:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:13:25,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:25,145 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 21:13:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:25,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:25,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:13:25,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:13:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:25,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879354208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:25,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:25,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-20 21:13:25,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788273312] [2022-07-20 21:13:25,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:25,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:13:25,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:25,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:13:25,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:13:25,309 INFO L87 Difference]: Start difference. First operand 224 states and 274 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 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 21:13:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:27,340 INFO L93 Difference]: Finished difference Result 928 states and 1112 transitions. [2022-07-20 21:13:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-07-20 21:13:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 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 44 [2022-07-20 21:13:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:27,343 INFO L225 Difference]: With dead ends: 928 [2022-07-20 21:13:27,343 INFO L226 Difference]: Without dead ends: 926 [2022-07-20 21:13:27,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5385 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1389, Invalid=12653, Unknown=0, NotChecked=0, Total=14042 [2022-07-20 21:13:27,347 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 212 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:27,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 417 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 21:13:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-07-20 21:13:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 340. [2022-07-20 21:13:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.2625368731563422) internal successors, (428), 339 states have internal predecessors, (428), 0 states have call successors, (0), 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 21:13:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 428 transitions. [2022-07-20 21:13:27,384 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 428 transitions. Word has length 44 [2022-07-20 21:13:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:27,384 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 428 transitions. [2022-07-20 21:13:27,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 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 21:13:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 428 transitions. [2022-07-20 21:13:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 21:13:27,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:27,385 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:27,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 21:13:27,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 21:13:27,585 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:27,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1961854480, now seen corresponding path program 1 times [2022-07-20 21:13:27,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:27,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525920825] [2022-07-20 21:13:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:27,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 21:13:27,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525920825] [2022-07-20 21:13:27,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525920825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:27,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:27,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:13:27,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326632634] [2022-07-20 21:13:27,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:27,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:13:27,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:27,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:13:27,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:13:27,626 INFO L87 Difference]: Start difference. First operand 340 states and 428 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 21:13:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:27,659 INFO L93 Difference]: Finished difference Result 380 states and 473 transitions. [2022-07-20 21:13:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:13:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 45 [2022-07-20 21:13:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:27,660 INFO L225 Difference]: With dead ends: 380 [2022-07-20 21:13:27,660 INFO L226 Difference]: Without dead ends: 302 [2022-07-20 21:13:27,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:13:27,662 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:27,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 44 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-20 21:13:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 286. [2022-07-20 21:13:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.249122807017544) internal successors, (356), 285 states have internal predecessors, (356), 0 states have call successors, (0), 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 21:13:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 356 transitions. [2022-07-20 21:13:27,682 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 356 transitions. Word has length 45 [2022-07-20 21:13:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:27,682 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 356 transitions. [2022-07-20 21:13:27,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 21:13:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 356 transitions. [2022-07-20 21:13:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 21:13:27,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:27,683 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:27,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 21:13:27,684 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash -255895901, now seen corresponding path program 5 times [2022-07-20 21:13:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512670053] [2022-07-20 21:13:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:27,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:27,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512670053] [2022-07-20 21:13:27,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512670053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:27,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295922476] [2022-07-20 21:13:27,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:13:27,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:27,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:27,866 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 21:13:27,867 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 21:13:27,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 21:13:27,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:13:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:13:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:28,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:28,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295922476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:28,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:28,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-07-20 21:13:28,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172766474] [2022-07-20 21:13:28,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 21:13:28,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 21:13:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:13:28,431 INFO L87 Difference]: Start difference. First operand 286 states and 356 transitions. Second operand has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 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 21:13:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:28,657 INFO L93 Difference]: Finished difference Result 477 states and 573 transitions. [2022-07-20 21:13:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:13:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 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 50 [2022-07-20 21:13:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:28,658 INFO L225 Difference]: With dead ends: 477 [2022-07-20 21:13:28,658 INFO L226 Difference]: Without dead ends: 345 [2022-07-20 21:13:28,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:13:28,659 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 291 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:28,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 182 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:13:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-20 21:13:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2022-07-20 21:13:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.228476821192053) internal successors, (371), 302 states have internal predecessors, (371), 0 states have call successors, (0), 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 21:13:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 371 transitions. [2022-07-20 21:13:28,690 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 371 transitions. Word has length 50 [2022-07-20 21:13:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:28,690 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 371 transitions. [2022-07-20 21:13:28,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 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 21:13:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 371 transitions. [2022-07-20 21:13:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 21:13:28,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:28,691 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:28,708 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 21:13:28,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:28,907 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:28,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash 588720312, now seen corresponding path program 6 times [2022-07-20 21:13:28,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:28,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700960640] [2022-07-20 21:13:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:28,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:29,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700960640] [2022-07-20 21:13:29,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700960640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374309901] [2022-07-20 21:13:29,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:13:29,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:29,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:29,118 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 21:13:29,119 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 21:13:29,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 21:13:29,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:13:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:13:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:29,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:29,341 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:29,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:29,353 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:29,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:29,363 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:29,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:29,372 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:13:29,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:13:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:29,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:29,976 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 25 treesize of output 23 [2022-07-20 21:13:29,978 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 88 treesize of output 84 [2022-07-20 21:13:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:30,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374309901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:30,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:30,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-07-20 21:13:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438231828] [2022-07-20 21:13:30,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:13:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:13:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:13:30,074 INFO L87 Difference]: Start difference. First operand 303 states and 371 transitions. Second operand has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 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 21:13:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:38,472 INFO L93 Difference]: Finished difference Result 1367 states and 1619 transitions. [2022-07-20 21:13:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-07-20 21:13:38,472 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 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 57 [2022-07-20 21:13:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:38,475 INFO L225 Difference]: With dead ends: 1367 [2022-07-20 21:13:38,475 INFO L226 Difference]: Without dead ends: 1232 [2022-07-20 21:13:38,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 100 SyntacticMatches, 55 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20797 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4325, Invalid=37905, Unknown=0, NotChecked=0, Total=42230 [2022-07-20 21:13:38,487 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1178 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 5052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1429 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:38,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 693 Invalid, 5052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 2493 Invalid, 0 Unknown, 1429 Unchecked, 1.7s Time] [2022-07-20 21:13:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-07-20 21:13:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 420. [2022-07-20 21:13:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.1909307875894988) internal successors, (499), 419 states have internal predecessors, (499), 0 states have call successors, (0), 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 21:13:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 499 transitions. [2022-07-20 21:13:38,541 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 499 transitions. Word has length 57 [2022-07-20 21:13:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:38,542 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 499 transitions. [2022-07-20 21:13:38,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 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 21:13:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 499 transitions. [2022-07-20 21:13:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 21:13:38,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:38,543 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:38,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:13:38,749 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,SelfDestructingSolverStorable20 [2022-07-20 21:13:38,749 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1863223928, now seen corresponding path program 2 times [2022-07-20 21:13:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:38,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104969173] [2022-07-20 21:13:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:38,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:38,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104969173] [2022-07-20 21:13:38,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104969173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:38,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64141716] [2022-07-20 21:13:38,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:13:38,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:38,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:38,865 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 21:13:38,866 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 21:13:38,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:13:38,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:13:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:13:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:38,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:38,953 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:38,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:38,964 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:38,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:38,977 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:38,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:38,990 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:38,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:39,139 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:13:39,139 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 42 treesize of output 20 [2022-07-20 21:13:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:39,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:39,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:13:39,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:13:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:39,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64141716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:39,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:39,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-07-20 21:13:39,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370022267] [2022-07-20 21:13:39,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:39,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:13:39,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:39,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:13:39,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:13:39,259 INFO L87 Difference]: Start difference. First operand 420 states and 499 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 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 21:13:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:42,374 INFO L93 Difference]: Finished difference Result 1214 states and 1423 transitions. [2022-07-20 21:13:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-07-20 21:13:42,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 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) Word has length 57 [2022-07-20 21:13:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:42,377 INFO L225 Difference]: With dead ends: 1214 [2022-07-20 21:13:42,377 INFO L226 Difference]: Without dead ends: 1212 [2022-07-20 21:13:42,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1761, Invalid=19995, Unknown=0, NotChecked=0, Total=21756 [2022-07-20 21:13:42,379 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 395 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 3747 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 4114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 3747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:42,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 368 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 3747 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 21:13:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-07-20 21:13:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 454. [2022-07-20 21:13:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.1876379690949228) internal successors, (538), 453 states have internal predecessors, (538), 0 states have call successors, (0), 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 21:13:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2022-07-20 21:13:42,434 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 57 [2022-07-20 21:13:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:42,434 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2022-07-20 21:13:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 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 21:13:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2022-07-20 21:13:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:13:42,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:42,435 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:42,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:13:42,651 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,SelfDestructingSolverStorable21 [2022-07-20 21:13:42,651 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:42,652 INFO L85 PathProgramCache]: Analyzing trace with hash -197389365, now seen corresponding path program 7 times [2022-07-20 21:13:42,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:42,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417098848] [2022-07-20 21:13:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:42,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:42,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:42,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417098848] [2022-07-20 21:13:42,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417098848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:42,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434108904] [2022-07-20 21:13:42,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:13:42,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:42,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:42,863 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 21:13:42,864 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 21:13:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:42,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:13:42,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:43,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:43,025 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:43,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:43,033 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:43,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:43,047 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:43,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:43,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:43,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:13:43,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:13:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:43,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434108904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:43,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:43,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 39 [2022-07-20 21:13:43,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460801250] [2022-07-20 21:13:43,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:43,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:13:43,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:13:43,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:13:43,716 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 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 21:13:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:46,405 INFO L93 Difference]: Finished difference Result 974 states and 1123 transitions. [2022-07-20 21:13:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-20 21:13:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 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 63 [2022-07-20 21:13:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:46,408 INFO L225 Difference]: With dead ends: 974 [2022-07-20 21:13:46,408 INFO L226 Difference]: Without dead ends: 942 [2022-07-20 21:13:46,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4216 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1632, Invalid=12410, Unknown=0, NotChecked=0, Total=14042 [2022-07-20 21:13:46,409 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 527 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:46,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 484 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 1536 Invalid, 0 Unknown, 296 Unchecked, 0.9s Time] [2022-07-20 21:13:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-07-20 21:13:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 466. [2022-07-20 21:13:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.1827956989247312) internal successors, (550), 465 states have internal predecessors, (550), 0 states have call successors, (0), 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 21:13:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 550 transitions. [2022-07-20 21:13:46,452 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 550 transitions. Word has length 63 [2022-07-20 21:13:46,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:46,452 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 550 transitions. [2022-07-20 21:13:46,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 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 21:13:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 550 transitions. [2022-07-20 21:13:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:13:46,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:46,453 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:46,469 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 21:13:46,653 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,SelfDestructingSolverStorable22 [2022-07-20 21:13:46,653 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1340950665, now seen corresponding path program 1 times [2022-07-20 21:13:46,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:46,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8636656] [2022-07-20 21:13:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:46,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-20 21:13:46,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:46,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8636656] [2022-07-20 21:13:46,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8636656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:13:46,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:13:46,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:13:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674550171] [2022-07-20 21:13:46,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:13:46,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:13:46,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:13:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:13:46,671 INFO L87 Difference]: Start difference. First operand 466 states and 550 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 21:13:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:46,714 INFO L93 Difference]: Finished difference Result 609 states and 720 transitions. [2022-07-20 21:13:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:13:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 63 [2022-07-20 21:13:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:46,716 INFO L225 Difference]: With dead ends: 609 [2022-07-20 21:13:46,716 INFO L226 Difference]: Without dead ends: 325 [2022-07-20 21:13:46,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:13:46,716 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:46,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:13:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-20 21:13:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 271. [2022-07-20 21:13:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1555555555555554) internal successors, (312), 270 states have internal predecessors, (312), 0 states have call successors, (0), 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 21:13:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 312 transitions. [2022-07-20 21:13:46,743 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 312 transitions. Word has length 63 [2022-07-20 21:13:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:46,743 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 312 transitions. [2022-07-20 21:13:46,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 21:13:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 312 transitions. [2022-07-20 21:13:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:13:46,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:46,744 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:46,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 21:13:46,744 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:46,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2060530293, now seen corresponding path program 2 times [2022-07-20 21:13:46,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:46,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396576666] [2022-07-20 21:13:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:46,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:46,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396576666] [2022-07-20 21:13:46,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396576666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730750579] [2022-07-20 21:13:46,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:13:46,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:46,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:46,944 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 21:13:46,945 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 21:13:47,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:13:47,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:13:47,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 21:13:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:47,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:47,127 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:47,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:47,143 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:13:47,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:47,156 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:13:47,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:13:47,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:13:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:47,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:13:47,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:13:47,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:13:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:47,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730750579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:13:47,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:13:47,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 41 [2022-07-20 21:13:47,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666210435] [2022-07-20 21:13:47,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:13:47,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 21:13:47,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:13:47,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 21:13:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 21:13:47,802 INFO L87 Difference]: Start difference. First operand 271 states and 312 transitions. Second operand has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 41 states have internal predecessors, (177), 0 states have call successors, (0), 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 21:13:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:13:52,368 INFO L93 Difference]: Finished difference Result 875 states and 987 transitions. [2022-07-20 21:13:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-07-20 21:13:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 41 states have internal predecessors, (177), 0 states have call successors, (0), 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 63 [2022-07-20 21:13:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:13:52,370 INFO L225 Difference]: With dead ends: 875 [2022-07-20 21:13:52,370 INFO L226 Difference]: Without dead ends: 865 [2022-07-20 21:13:52,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6512 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2447, Invalid=19309, Unknown=0, NotChecked=0, Total=21756 [2022-07-20 21:13:52,372 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 770 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 1226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1226 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 675 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:13:52,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 490 Invalid, 3850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1226 Valid, 1949 Invalid, 0 Unknown, 675 Unchecked, 1.2s Time] [2022-07-20 21:13:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-07-20 21:13:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 277. [2022-07-20 21:13:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.1521739130434783) internal successors, (318), 276 states have internal predecessors, (318), 0 states have call successors, (0), 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 21:13:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 318 transitions. [2022-07-20 21:13:52,407 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 318 transitions. Word has length 63 [2022-07-20 21:13:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:13:52,407 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 318 transitions. [2022-07-20 21:13:52,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 41 states have internal predecessors, (177), 0 states have call successors, (0), 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 21:13:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 318 transitions. [2022-07-20 21:13:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:13:52,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:13:52,410 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:13:52,427 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 21:13:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:52,610 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:13:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:13:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash 336799115, now seen corresponding path program 3 times [2022-07-20 21:13:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:13:52,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131412462] [2022-07-20 21:13:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:13:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:13:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:13:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:13:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:13:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131412462] [2022-07-20 21:13:52,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131412462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:13:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778110866] [2022-07-20 21:13:52,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:13:52,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:13:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:13:52,821 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 21:13:52,823 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 21:13:52,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:13:52,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:13:52,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:13:52,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:13:52,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:13:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:53,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:53,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:53,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:53,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:13:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:13:53,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 21:13:53,088 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-07-20 21:13:53,088 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 24 treesize of output 23 [2022-07-20 21:13:53,133 INFO L356 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2022-07-20 21:13:53,133 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 21:13:53,159 INFO L356 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2022-07-20 21:13:53,160 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 21:13:53,178 INFO L356 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2022-07-20 21:13:53,178 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 21:13:53,222 INFO L356 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2022-07-20 21:13:53,222 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 21:13:53,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:13:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:13:53,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:04,454 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 39 treesize of output 37 [2022-07-20 21:14:04,465 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 350 treesize of output 348 [2022-07-20 21:14:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:14:05,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778110866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:05,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:05,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 38 [2022-07-20 21:14:05,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056803815] [2022-07-20 21:14:05,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:05,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:14:05,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:05,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:14:05,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1239, Unknown=20, NotChecked=0, Total=1406 [2022-07-20 21:14:05,642 INFO L87 Difference]: Start difference. First operand 277 states and 318 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 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 21:14:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:09,735 INFO L93 Difference]: Finished difference Result 595 states and 670 transitions. [2022-07-20 21:14:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-20 21:14:09,735 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 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 63 [2022-07-20 21:14:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:09,737 INFO L225 Difference]: With dead ends: 595 [2022-07-20 21:14:09,737 INFO L226 Difference]: Without dead ends: 549 [2022-07-20 21:14:09,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 135 SyntacticMatches, 10 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4234 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=2027, Invalid=12714, Unknown=21, NotChecked=0, Total=14762 [2022-07-20 21:14:09,739 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 914 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:09,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 943 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1984 Invalid, 0 Unknown, 264 Unchecked, 0.9s Time] [2022-07-20 21:14:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-07-20 21:14:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 345. [2022-07-20 21:14:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.1453488372093024) internal successors, (394), 344 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 21:14:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 394 transitions. [2022-07-20 21:14:09,781 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 394 transitions. Word has length 63 [2022-07-20 21:14:09,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:09,782 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 394 transitions. [2022-07-20 21:14:09,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 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 21:14:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 394 transitions. [2022-07-20 21:14:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:14:09,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:09,783 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:09,799 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 21:14:09,999 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,SelfDestructingSolverStorable25 [2022-07-20 21:14:09,999 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2004028023, now seen corresponding path program 2 times [2022-07-20 21:14:10,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:10,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751493944] [2022-07-20 21:14:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:10,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751493944] [2022-07-20 21:14:10,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751493944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056183765] [2022-07-20 21:14:10,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:14:10,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:10,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:10,144 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 21:14:10,145 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 21:14:10,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:14:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:14:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:10,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:14:10,250 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:10,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:10,262 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:10,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:10,273 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:10,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:10,474 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:14:10,474 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 42 treesize of output 20 [2022-07-20 21:14:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:10,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:10,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:14:10,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:14:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:10,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056183765] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:10,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:10,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2022-07-20 21:14:10,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070749597] [2022-07-20 21:14:10,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:10,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:14:10,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:10,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:14:10,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:14:10,588 INFO L87 Difference]: Start difference. First operand 345 states and 394 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 21:14:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:14,441 INFO L93 Difference]: Finished difference Result 1161 states and 1329 transitions. [2022-07-20 21:14:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-07-20 21:14:14,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 63 [2022-07-20 21:14:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:14,443 INFO L225 Difference]: With dead ends: 1161 [2022-07-20 21:14:14,443 INFO L226 Difference]: Without dead ends: 1159 [2022-07-20 21:14:14,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2666, Invalid=34776, Unknown=0, NotChecked=0, Total=37442 [2022-07-20 21:14:14,445 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 483 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 3721 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 4153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 3721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:14,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 437 Invalid, 4153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 3721 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 21:14:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-07-20 21:14:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 363. [2022-07-20 21:14:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.143646408839779) internal successors, (414), 362 states have internal predecessors, (414), 0 states have call successors, (0), 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 21:14:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 414 transitions. [2022-07-20 21:14:14,487 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 414 transitions. Word has length 63 [2022-07-20 21:14:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:14,488 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 414 transitions. [2022-07-20 21:14:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 21:14:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 414 transitions. [2022-07-20 21:14:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:14:14,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:14,488 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:14,504 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 21:14:14,689 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,SelfDestructingSolverStorable26 [2022-07-20 21:14:14,689 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:14,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1613028194, now seen corresponding path program 8 times [2022-07-20 21:14:14,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:14,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175658308] [2022-07-20 21:14:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:14,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:14,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:14,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175658308] [2022-07-20 21:14:14,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175658308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:14,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102717436] [2022-07-20 21:14:14,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:14:14,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:14,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:14,900 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 21:14:14,901 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 21:14:14,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:14:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 21:14:14,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:15,065 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 16 treesize of output 12 [2022-07-20 21:14:15,090 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:15,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:15,099 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:14:15,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:14:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:15,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:15,861 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 35 treesize of output 31 [2022-07-20 21:14:15,862 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 67 treesize of output 59 [2022-07-20 21:14:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:16,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102717436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:16,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:16,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 18] total 47 [2022-07-20 21:14:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80383766] [2022-07-20 21:14:16,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:14:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:14:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:14:16,068 INFO L87 Difference]: Start difference. First operand 363 states and 414 transitions. Second operand has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 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 21:14:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:24,712 INFO L93 Difference]: Finished difference Result 2054 states and 2336 transitions. [2022-07-20 21:14:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-07-20 21:14:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 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 21:14:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:24,715 INFO L225 Difference]: With dead ends: 2054 [2022-07-20 21:14:24,715 INFO L226 Difference]: Without dead ends: 1756 [2022-07-20 21:14:24,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18600 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5033, Invalid=46269, Unknown=0, NotChecked=0, Total=51302 [2022-07-20 21:14:24,719 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 759 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 3210 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 3210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:24,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 532 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 3210 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 21:14:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-07-20 21:14:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 614. [2022-07-20 21:14:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.135399673735726) internal successors, (696), 613 states have internal predecessors, (696), 0 states have call successors, (0), 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 21:14:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 696 transitions. [2022-07-20 21:14:24,805 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 696 transitions. Word has length 69 [2022-07-20 21:14:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:24,805 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 696 transitions. [2022-07-20 21:14:24,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 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 21:14:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 696 transitions. [2022-07-20 21:14:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:14:24,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:24,806 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:24,826 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 21:14:25,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 21:14:25,024 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:25,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1288906012, now seen corresponding path program 1 times [2022-07-20 21:14:25,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:25,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131624173] [2022-07-20 21:14:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-20 21:14:25,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:25,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131624173] [2022-07-20 21:14:25,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131624173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:25,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:25,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:14:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267155677] [2022-07-20 21:14:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:25,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:14:25,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:14:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:14:25,044 INFO L87 Difference]: Start difference. First operand 614 states and 696 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 21:14:25,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:25,158 INFO L93 Difference]: Finished difference Result 1269 states and 1440 transitions. [2022-07-20 21:14:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:14:25,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 69 [2022-07-20 21:14:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:25,160 INFO L225 Difference]: With dead ends: 1269 [2022-07-20 21:14:25,160 INFO L226 Difference]: Without dead ends: 808 [2022-07-20 21:14:25,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:14:25,161 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:25,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:14:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-07-20 21:14:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 625. [2022-07-20 21:14:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 1.125) internal successors, (702), 624 states have internal predecessors, (702), 0 states have call successors, (0), 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 21:14:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 702 transitions. [2022-07-20 21:14:25,238 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 702 transitions. Word has length 69 [2022-07-20 21:14:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:25,238 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 702 transitions. [2022-07-20 21:14:25,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 21:14:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 702 transitions. [2022-07-20 21:14:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:14:25,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:25,239 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:25,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 21:14:25,240 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1732806686, now seen corresponding path program 1 times [2022-07-20 21:14:25,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:25,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886410270] [2022-07-20 21:14:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:25,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-20 21:14:25,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:25,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886410270] [2022-07-20 21:14:25,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886410270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:25,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:25,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:14:25,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248789982] [2022-07-20 21:14:25,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:25,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:14:25,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:14:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:14:25,276 INFO L87 Difference]: Start difference. First operand 625 states and 702 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 21:14:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:25,365 INFO L93 Difference]: Finished difference Result 714 states and 797 transitions. [2022-07-20 21:14:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:14:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) Word has length 69 [2022-07-20 21:14:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:25,367 INFO L225 Difference]: With dead ends: 714 [2022-07-20 21:14:25,367 INFO L226 Difference]: Without dead ends: 602 [2022-07-20 21:14:25,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:14:25,368 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:25,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 41 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:14:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-07-20 21:14:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 571. [2022-07-20 21:14:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.1263157894736842) internal successors, (642), 570 states have internal predecessors, (642), 0 states have call successors, (0), 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 21:14:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 642 transitions. [2022-07-20 21:14:25,436 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 642 transitions. Word has length 69 [2022-07-20 21:14:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:25,437 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 642 transitions. [2022-07-20 21:14:25,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 21:14:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 642 transitions. [2022-07-20 21:14:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:14:25,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:25,438 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:25,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-20 21:14:25,438 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash -763757732, now seen corresponding path program 1 times [2022-07-20 21:14:25,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:25,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288218449] [2022-07-20 21:14:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:25,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-20 21:14:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:25,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288218449] [2022-07-20 21:14:25,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288218449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:25,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:25,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:14:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504473145] [2022-07-20 21:14:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:25,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:14:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:25,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:14:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:14:25,464 INFO L87 Difference]: Start difference. First operand 571 states and 642 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 21:14:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:25,536 INFO L93 Difference]: Finished difference Result 695 states and 781 transitions. [2022-07-20 21:14:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:14:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) Word has length 69 [2022-07-20 21:14:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:25,538 INFO L225 Difference]: With dead ends: 695 [2022-07-20 21:14:25,539 INFO L226 Difference]: Without dead ends: 460 [2022-07-20 21:14:25,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:14:25,540 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:25,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:14:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-20 21:14:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 444. [2022-07-20 21:14:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.1218961625282167) internal successors, (497), 443 states have internal predecessors, (497), 0 states have call successors, (0), 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 21:14:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 497 transitions. [2022-07-20 21:14:25,599 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 497 transitions. Word has length 69 [2022-07-20 21:14:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:25,600 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 497 transitions. [2022-07-20 21:14:25,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 21:14:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 497 transitions. [2022-07-20 21:14:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:14:25,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:25,602 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:25,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 21:14:25,602 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:25,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2073835932, now seen corresponding path program 1 times [2022-07-20 21:14:25,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:25,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076444591] [2022-07-20 21:14:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:25,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:25,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076444591] [2022-07-20 21:14:25,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076444591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230081684] [2022-07-20 21:14:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:25,747 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 21:14:25,748 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 21:14:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:25,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 21:14:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:25,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:14:25,852 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:25,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:25,863 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:25,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:26,083 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-20 21:14:26,083 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 42 treesize of output 20 [2022-07-20 21:14:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:26,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:26,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:14:26,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-20 21:14:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:26,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230081684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:26,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:26,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-07-20 21:14:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576002600] [2022-07-20 21:14:26,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:14:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:14:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:14:26,200 INFO L87 Difference]: Start difference. First operand 444 states and 497 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 21:14:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:30,734 INFO L93 Difference]: Finished difference Result 1430 states and 1601 transitions. [2022-07-20 21:14:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-07-20 21:14:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 21:14:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:30,737 INFO L225 Difference]: With dead ends: 1430 [2022-07-20 21:14:30,737 INFO L226 Difference]: Without dead ends: 1428 [2022-07-20 21:14:30,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23976 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3783, Invalid=52149, Unknown=0, NotChecked=0, Total=55932 [2022-07-20 21:14:30,741 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 658 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 3504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:30,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 506 Invalid, 3504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 2981 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 21:14:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-07-20 21:14:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 406. [2022-07-20 21:14:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.1209876543209876) internal successors, (454), 405 states have internal predecessors, (454), 0 states have call successors, (0), 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 21:14:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 454 transitions. [2022-07-20 21:14:30,807 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 454 transitions. Word has length 69 [2022-07-20 21:14:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:30,808 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 454 transitions. [2022-07-20 21:14:30,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 21:14:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 454 transitions. [2022-07-20 21:14:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 21:14:30,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:30,809 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:30,841 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 21:14:31,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:31,023 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:31,024 INFO L85 PathProgramCache]: Analyzing trace with hash -528467946, now seen corresponding path program 4 times [2022-07-20 21:14:31,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:31,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010218178] [2022-07-20 21:14:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010218178] [2022-07-20 21:14:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010218178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978133246] [2022-07-20 21:14:31,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:14:31,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:31,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:31,231 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 21:14:31,233 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 21:14:31,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:14:31,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 21:14:31,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:31,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:14:31,393 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:31,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:31,402 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:31,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:31,411 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:31,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:14:31,436 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:14:31,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:14:31,447 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:14:31,447 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 26 treesize of output 25 [2022-07-20 21:14:31,456 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:14:31,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:14:31,466 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:14:31,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:14:31,475 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:14:31,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:14:31,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:14:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:31,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:11,467 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 25 treesize of output 23 [2022-07-20 21:15:11,470 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 88 treesize of output 84 [2022-07-20 21:15:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:11,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978133246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:11,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:11,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 17] total 39 [2022-07-20 21:15:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486549991] [2022-07-20 21:15:11,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:11,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:15:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:15:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1306, Unknown=23, NotChecked=0, Total=1482 [2022-07-20 21:15:11,537 INFO L87 Difference]: Start difference. First operand 406 states and 454 transitions. Second operand has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 0 states have call successors, (0), 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 21:15:14,215 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 5) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (= 5 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 24))) (forall ((|v_ULTIMATE.start_main_~i~0#1_257| Int)) (or (forall ((v_ArrVal_1006 Int)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 20 |v_ULTIMATE.start_main_~i~0#1_257|) (- 16) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_1006) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 24)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_257|)))))) is different from false [2022-07-20 21:15:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:19,347 INFO L93 Difference]: Finished difference Result 975 states and 1061 transitions. [2022-07-20 21:15:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-20 21:15:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 0 states have call successors, (0), 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 70 [2022-07-20 21:15:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:19,349 INFO L225 Difference]: With dead ends: 975 [2022-07-20 21:15:19,350 INFO L226 Difference]: Without dead ends: 959 [2022-07-20 21:15:19,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2704 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=932, Invalid=7977, Unknown=25, NotChecked=186, Total=9120 [2022-07-20 21:15:19,352 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 711 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:19,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 582 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1231 Invalid, 0 Unknown, 237 Unchecked, 0.5s Time] [2022-07-20 21:15:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-07-20 21:15:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 427. [2022-07-20 21:15:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.1220657276995305) internal successors, (478), 426 states have internal predecessors, (478), 0 states have call successors, (0), 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 21:15:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 478 transitions. [2022-07-20 21:15:19,420 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 478 transitions. Word has length 70 [2022-07-20 21:15:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:19,420 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 478 transitions. [2022-07-20 21:15:19,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 0 states have call successors, (0), 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 21:15:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 478 transitions. [2022-07-20 21:15:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:15:19,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:19,421 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:19,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:19,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:19,622 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash -709817551, now seen corresponding path program 9 times [2022-07-20 21:15:19,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:19,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764664854] [2022-07-20 21:15:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:19,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:19,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764664854] [2022-07-20 21:15:19,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764664854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812670023] [2022-07-20 21:15:19,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:15:19,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:19,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:19,826 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 21:15:19,827 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 21:15:20,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 21:15:20,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 21:15:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:20,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:15:20,133 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:15:20,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:15:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:20,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:20,788 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 25 treesize of output 23 [2022-07-20 21:15:20,790 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 200 treesize of output 192 [2022-07-20 21:15:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:20,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812670023] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:20,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:20,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2022-07-20 21:15:20,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337575719] [2022-07-20 21:15:20,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:20,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 21:15:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 21:15:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 21:15:20,915 INFO L87 Difference]: Start difference. First operand 427 states and 478 transitions. Second operand has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 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 21:15:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:29,221 INFO L93 Difference]: Finished difference Result 972 states and 1054 transitions. [2022-07-20 21:15:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-07-20 21:15:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 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 21:15:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:29,224 INFO L225 Difference]: With dead ends: 972 [2022-07-20 21:15:29,224 INFO L226 Difference]: Without dead ends: 956 [2022-07-20 21:15:29,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 121 SyntacticMatches, 48 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20247 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4165, Invalid=38065, Unknown=0, NotChecked=0, Total=42230 [2022-07-20 21:15:29,226 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1074 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 3970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:29,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 832 Invalid, 3970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 3062 Invalid, 0 Unknown, 130 Unchecked, 1.7s Time] [2022-07-20 21:15:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-07-20 21:15:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 487. [2022-07-20 21:15:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.123456790123457) internal successors, (546), 486 states have internal predecessors, (546), 0 states have call successors, (0), 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 21:15:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 546 transitions. [2022-07-20 21:15:29,299 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 546 transitions. Word has length 75 [2022-07-20 21:15:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:29,299 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 546 transitions. [2022-07-20 21:15:29,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 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 21:15:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 546 transitions. [2022-07-20 21:15:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:15:29,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:29,300 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:29,317 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 21:15:29,500 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,SelfDestructingSolverStorable33 [2022-07-20 21:15:29,500 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash -596856401, now seen corresponding path program 5 times [2022-07-20 21:15:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:29,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464861102] [2022-07-20 21:15:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:29,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:29,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464861102] [2022-07-20 21:15:29,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464861102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:29,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805087514] [2022-07-20 21:15:29,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:15:29,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:29,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:29,653 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 21:15:29,683 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 21:15:29,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-20 21:15:29,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 21:15:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:29,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:15:30,009 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:30,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:15:30,019 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:30,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:15:30,030 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:30,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:15:30,039 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:15:30,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:15:30,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 106 proven. 79 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:15:30,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:30,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-20 21:15:30,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-20 21:15:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 106 proven. 79 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:15:30,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805087514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:30,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:30,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-07-20 21:15:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119434448] [2022-07-20 21:15:30,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:30,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 21:15:30,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 21:15:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:15:30,713 INFO L87 Difference]: Start difference. First operand 487 states and 546 transitions. Second operand has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 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 21:15:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:41,046 INFO L93 Difference]: Finished difference Result 1239 states and 1379 transitions. [2022-07-20 21:15:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-07-20 21:15:41,047 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 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 75 [2022-07-20 21:15:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:41,049 INFO L225 Difference]: With dead ends: 1239 [2022-07-20 21:15:41,049 INFO L226 Difference]: Without dead ends: 1179 [2022-07-20 21:15:41,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30298 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=7323, Invalid=68027, Unknown=0, NotChecked=0, Total=75350 [2022-07-20 21:15:41,052 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1021 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 5584 mSolverCounterSat, 1034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 6879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 5584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:41,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 1093 Invalid, 6879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1034 Valid, 5584 Invalid, 0 Unknown, 261 Unchecked, 2.6s Time] [2022-07-20 21:15:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-07-20 21:15:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 771. [2022-07-20 21:15:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.1142857142857143) internal successors, (858), 770 states have internal predecessors, (858), 0 states have call successors, (0), 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 21:15:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 858 transitions. [2022-07-20 21:15:41,192 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 858 transitions. Word has length 75 [2022-07-20 21:15:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:41,192 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 858 transitions. [2022-07-20 21:15:41,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 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 21:15:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 858 transitions. [2022-07-20 21:15:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 21:15:41,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:41,193 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:41,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:41,398 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,SelfDestructingSolverStorable34 [2022-07-20 21:15:41,398 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash 29296747, now seen corresponding path program 1 times [2022-07-20 21:15:41,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:41,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073709398] [2022-07-20 21:15:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:41,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 12 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:41,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073709398] [2022-07-20 21:15:41,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073709398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316270010] [2022-07-20 21:15:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:41,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:41,718 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 21:15:41,719 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 21:15:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:41,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 21:15:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:41,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 21:15:41,906 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:41,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:15:41,917 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:41,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:15:41,931 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:41,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-20 21:15:41,962 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:41,963 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 26 treesize of output 25 [2022-07-20 21:15:41,973 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:41,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:41,983 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:41,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:41,993 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:41,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:42,002 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:42,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:42,032 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:42,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:42,042 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:42,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:42,052 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:42,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:42,062 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:42,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:42,071 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:42,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:42,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 18 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:42,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:17:04,262 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_319| Int)) (or (forall ((v_ArrVal_1220 Int) (v_ArrVal_1210 Int) (|v_ULTIMATE.start_main_~i~0#1_318| Int)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (- 16) (* 20 |v_ULTIMATE.start_main_~i~0#1_319|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_1210) (+ (- 16) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 20 |v_ULTIMATE.start_main_~i~0#1_318|)) v_ArrVal_1220) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 24))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_319| 1) |v_ULTIMATE.start_main_~i~0#1_318|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_319|)))) is different from false