./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:36:33,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:36:33,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:36:33,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:36:33,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:36:33,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:36:33,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:36:33,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:36:33,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:36:33,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:36:33,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:36:33,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:36:33,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:36:33,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:36:33,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:36:33,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:36:33,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:36:33,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:36:33,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:36:33,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:36:33,138 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:36:33,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:36:33,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:36:33,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:36:33,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:36:33,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:36:33,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:36:33,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:36:33,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:36:33,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:36:33,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:36:33,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:36:33,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:36:33,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:36:33,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:36:33,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:36:33,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:36:33,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:36:33,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:36:33,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:36:33,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:36:33,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:36:33,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:36:33,190 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:36:33,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:36:33,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:36:33,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:36:33,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:36:33,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:36:33,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:36:33,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:36:33,193 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:36:33,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:36:33,194 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:36:33,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:36:33,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:36:33,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:36:33,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:36:33,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:36:33,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:36:33,196 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:36:33,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:36:33,196 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:36:33,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:36:33,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:36:33,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:36:33,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:36:33,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:36:33,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:36:33,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:36:33,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:36:33,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:36:33,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:36:33,199 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:36:33,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:36:33,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:36:33,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2022-07-19 09:36:33,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:36:33,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:36:33,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:36:33,433 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:36:33,434 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:36:33,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr5.c [2022-07-19 09:36:33,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d07d6b0cc/986b3bbe35d144c3b903ae9ca00d356f/FLAG9d849b538 [2022-07-19 09:36:33,920 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:36:33,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c [2022-07-19 09:36:33,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d07d6b0cc/986b3bbe35d144c3b903ae9ca00d356f/FLAG9d849b538 [2022-07-19 09:36:33,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d07d6b0cc/986b3bbe35d144c3b903ae9ca00d356f [2022-07-19 09:36:33,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:36:33,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:36:33,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:36:33,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:36:33,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:36:33,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:36:33" (1/1) ... [2022-07-19 09:36:33,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de36042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:33, skipping insertion in model container [2022-07-19 09:36:33,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:36:33" (1/1) ... [2022-07-19 09:36:33,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:36:33,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:36:34,115 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2022-07-19 09:36:34,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:36:34,142 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:36:34,153 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2022-07-19 09:36:34,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:36:34,174 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:36:34,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34 WrapperNode [2022-07-19 09:36:34,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:36:34,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:36:34,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:36:34,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:36:34,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,217 INFO L137 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2022-07-19 09:36:34,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:36:34,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:36:34,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:36:34,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:36:34,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:36:34,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:36:34,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:36:34,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:36:34,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (1/1) ... [2022-07-19 09:36:34,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:36:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:34,301 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) [2022-07-19 09:36:34,311 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 [2022-07-19 09:36:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:36:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:36:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:36:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:36:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-19 09:36:34,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-19 09:36:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:36:34,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:36:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:36:34,390 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:36:34,392 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:36:34,678 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:36:34,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:36:34,684 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 09:36:34,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:36:34 BoogieIcfgContainer [2022-07-19 09:36:34,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:36:34,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:36:34,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:36:34,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:36:34,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:36:33" (1/3) ... [2022-07-19 09:36:34,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260718c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:36:34, skipping insertion in model container [2022-07-19 09:36:34,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:34" (2/3) ... [2022-07-19 09:36:34,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260718c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:36:34, skipping insertion in model container [2022-07-19 09:36:34,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:36:34" (3/3) ... [2022-07-19 09:36:34,693 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2022-07-19 09:36:34,705 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:36:34,719 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:36:34,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:36:34,770 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@4f06e2c2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a5b549 [2022-07-19 09:36:34,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:36:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 09:36:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 09:36:34,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:34,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:34,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1765780314, now seen corresponding path program 1 times [2022-07-19 09:36:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416502652] [2022-07-19 09:36:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:36:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:34,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416502652] [2022-07-19 09:36:34,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416502652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:36:34,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:36:34,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:36:34,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298093215] [2022-07-19 09:36:34,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:36:35,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:36:35,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:35,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:36:35,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:36:35,036 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:36:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:35,061 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2022-07-19 09:36:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:36:35,064 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 09:36:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:35,071 INFO L225 Difference]: With dead ends: 69 [2022-07-19 09:36:35,072 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 09:36:35,075 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 [2022-07-19 09:36:35,078 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:35,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:36:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 09:36:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-19 09:36:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 09:36:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-07-19 09:36:35,121 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2022-07-19 09:36:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:35,121 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-07-19 09:36:35,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:36:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-07-19 09:36:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 09:36:35,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:35,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:35,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:36:35,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:35,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1807338759, now seen corresponding path program 1 times [2022-07-19 09:36:35,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:35,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208133849] [2022-07-19 09:36:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:35,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:36:35,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:35,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208133849] [2022-07-19 09:36:35,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208133849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:36:35,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:36:35,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 09:36:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969390824] [2022-07-19 09:36:35,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:36:35,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 09:36:35,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:35,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 09:36:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:36:35,397 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:36:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:35,543 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-07-19 09:36:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:36:35,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 09:36:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:35,545 INFO L225 Difference]: With dead ends: 57 [2022-07-19 09:36:35,545 INFO L226 Difference]: Without dead ends: 50 [2022-07-19 09:36:35,545 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 [2022-07-19 09:36:35,547 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:35,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:36:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-19 09:36:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-07-19 09:36:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 09:36:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-07-19 09:36:35,573 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 11 [2022-07-19 09:36:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:35,575 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-07-19 09:36:35,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:36:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-07-19 09:36:35,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 09:36:35,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:35,579 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:35,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:36:35,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1950771071, now seen corresponding path program 1 times [2022-07-19 09:36:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:35,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013903479] [2022-07-19 09:36:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:35,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:35,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:35,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:35,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:35,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:36:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:35,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:35,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013903479] [2022-07-19 09:36:35,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013903479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479538053] [2022-07-19 09:36:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:35,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:35,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:35,987 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) [2022-07-19 09:36:35,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:36:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:36,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 09:36:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:36,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:36:36,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:36,171 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 30 treesize of output 29 [2022-07-19 09:36:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:36,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:36:36,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:36,235 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 30 treesize of output 29 [2022-07-19 09:36:36,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:36,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-19 09:36:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:36,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:36,537 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 [2022-07-19 09:36:36,541 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 [2022-07-19 09:36:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:36,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479538053] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:36,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:36,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-07-19 09:36:36,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510462142] [2022-07-19 09:36:36,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:36,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 09:36:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 09:36:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-19 09:36:36,565 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:36:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:36,950 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2022-07-19 09:36:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 09:36:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-07-19 09:36:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:36,952 INFO L225 Difference]: With dead ends: 120 [2022-07-19 09:36:36,952 INFO L226 Difference]: Without dead ends: 118 [2022-07-19 09:36:36,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:36:36,954 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:36,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 293 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:36:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-19 09:36:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2022-07-19 09:36:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 09:36:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2022-07-19 09:36:36,967 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 43 [2022-07-19 09:36:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:36,967 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2022-07-19 09:36:36,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:36:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2022-07-19 09:36:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 09:36:36,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:36,969 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:36,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:37,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:37,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:37,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1642596351, now seen corresponding path program 1 times [2022-07-19 09:36:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:37,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849209289] [2022-07-19 09:36:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:36:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:37,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849209289] [2022-07-19 09:36:37,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849209289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794731120] [2022-07-19 09:36:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:37,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:37,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:37,460 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) [2022-07-19 09:36:37,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:36:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 09:36:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:37,601 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 [2022-07-19 09:36:37,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:37,674 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 [2022-07-19 09:36:37,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:37,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-19 09:36:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:37,805 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 [2022-07-19 09:36:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:37,868 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 [2022-07-19 09:36:37,933 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 [2022-07-19 09:36:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:37,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:38,146 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 [2022-07-19 09:36:38,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-19 09:36:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:38,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794731120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:38,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:38,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-19 09:36:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712877720] [2022-07-19 09:36:38,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:38,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:36:38,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:36:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:36:38,221 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-19 09:36:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:39,019 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2022-07-19 09:36:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 09:36:39,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 43 [2022-07-19 09:36:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:39,023 INFO L225 Difference]: With dead ends: 179 [2022-07-19 09:36:39,023 INFO L226 Difference]: Without dead ends: 177 [2022-07-19 09:36:39,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 09:36:39,025 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:39,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 516 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 643 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-07-19 09:36:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-19 09:36:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 87. [2022-07-19 09:36:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.359375) internal successors, (87), 65 states have internal predecessors, (87), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-19 09:36:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2022-07-19 09:36:39,046 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 43 [2022-07-19 09:36:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:39,046 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2022-07-19 09:36:39,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-19 09:36:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2022-07-19 09:36:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 09:36:39,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:39,049 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:39,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 09:36:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 09:36:39,264 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1666037387, now seen corresponding path program 1 times [2022-07-19 09:36:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777783568] [2022-07-19 09:36:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:39,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:39,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:39,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:39,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:39,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:39,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:36:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:39,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:39,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777783568] [2022-07-19 09:36:39,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777783568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:39,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958355702] [2022-07-19 09:36:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:39,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:39,463 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) [2022-07-19 09:36:39,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:36:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:39,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 09:36:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:39,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:36:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:39,580 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 30 treesize of output 29 [2022-07-19 09:36:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:39,599 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 30 treesize of output 29 [2022-07-19 09:36:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:39,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:36:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:39,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:39,764 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 [2022-07-19 09:36:39,767 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 [2022-07-19 09:36:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:39,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958355702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:39,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:39,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-19 09:36:39,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764789655] [2022-07-19 09:36:39,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:39,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:36:39,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:39,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:36:39,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:36:39,788 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:36:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:40,231 INFO L93 Difference]: Finished difference Result 322 states and 492 transitions. [2022-07-19 09:36:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 09:36:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2022-07-19 09:36:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:40,234 INFO L225 Difference]: With dead ends: 322 [2022-07-19 09:36:40,234 INFO L226 Difference]: Without dead ends: 320 [2022-07-19 09:36:40,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:36:40,235 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:40,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 345 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:36:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-19 09:36:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 153. [2022-07-19 09:36:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.3928571428571428) internal successors, (156), 114 states have internal predecessors, (156), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-19 09:36:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2022-07-19 09:36:40,272 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 47 [2022-07-19 09:36:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:40,273 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2022-07-19 09:36:40,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:36:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2022-07-19 09:36:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 09:36:40,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:40,275 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:40,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:40,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:40,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash -279833993, now seen corresponding path program 1 times [2022-07-19 09:36:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:40,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591543942] [2022-07-19 09:36:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:40,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:40,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:40,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:40,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:40,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:36:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:40,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591543942] [2022-07-19 09:36:40,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591543942] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495097630] [2022-07-19 09:36:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:40,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:40,643 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) [2022-07-19 09:36:40,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:36:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 09:36:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:40,804 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 [2022-07-19 09:36:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:40,872 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 [2022-07-19 09:36:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:40,917 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 [2022-07-19 09:36:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:40,975 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 [2022-07-19 09:36:41,061 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 [2022-07-19 09:36:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 09:36:41,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:41,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:36:41,223 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 [2022-07-19 09:36:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:41,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495097630] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:41,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:41,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-07-19 09:36:41,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875942653] [2022-07-19 09:36:41,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:41,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:36:41,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:41,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:36:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-19 09:36:41,286 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-19 09:36:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:42,269 INFO L93 Difference]: Finished difference Result 462 states and 691 transitions. [2022-07-19 09:36:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 09:36:42,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 47 [2022-07-19 09:36:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:42,273 INFO L225 Difference]: With dead ends: 462 [2022-07-19 09:36:42,274 INFO L226 Difference]: Without dead ends: 460 [2022-07-19 09:36:42,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:36:42,276 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 199 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:42,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 638 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 868 Invalid, 0 Unknown, 103 Unchecked, 0.6s Time] [2022-07-19 09:36:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-19 09:36:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 220. [2022-07-19 09:36:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 161 states have internal predecessors, (223), 57 states have call successors, (57), 4 states have call predecessors, (57), 4 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2022-07-19 09:36:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 337 transitions. [2022-07-19 09:36:42,315 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 337 transitions. Word has length 47 [2022-07-19 09:36:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:42,316 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 337 transitions. [2022-07-19 09:36:42,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-19 09:36:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 337 transitions. [2022-07-19 09:36:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 09:36:42,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:42,318 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:42,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:42,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:42,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash 131088491, now seen corresponding path program 2 times [2022-07-19 09:36:42,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:42,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319828941] [2022-07-19 09:36:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:42,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:42,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:42,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:42,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:42,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:36:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:42,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:42,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319828941] [2022-07-19 09:36:42,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319828941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:42,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194328124] [2022-07-19 09:36:42,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:36:42,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:42,620 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) [2022-07-19 09:36:42,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:36:42,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:36:42,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:42,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 09:36:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:42,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:36:42,750 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:42,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:36:42,769 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:36:42,769 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 [2022-07-19 09:36:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:42,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:42,873 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 [2022-07-19 09:36:42,875 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 [2022-07-19 09:36:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:42,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194328124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:42,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:42,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-19 09:36:42,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138368118] [2022-07-19 09:36:42,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:42,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 09:36:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 09:36:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 09:36:42,900 INFO L87 Difference]: Start difference. First operand 220 states and 337 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 09:36:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:43,622 INFO L93 Difference]: Finished difference Result 1182 states and 1872 transitions. [2022-07-19 09:36:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:36:43,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2022-07-19 09:36:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:43,629 INFO L225 Difference]: With dead ends: 1182 [2022-07-19 09:36:43,629 INFO L226 Difference]: Without dead ends: 1180 [2022-07-19 09:36:43,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:36:43,631 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 99 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:43,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 584 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 09:36:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-19 09:36:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 481. [2022-07-19 09:36:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 346 states have (on average 1.4421965317919074) internal successors, (499), 349 states have internal predecessors, (499), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 127 states have call predecessors, (130), 130 states have call successors, (130) [2022-07-19 09:36:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 759 transitions. [2022-07-19 09:36:43,705 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 759 transitions. Word has length 51 [2022-07-19 09:36:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:43,705 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 759 transitions. [2022-07-19 09:36:43,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 09:36:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 759 transitions. [2022-07-19 09:36:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 09:36:43,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:43,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:43,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:43,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:43,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2054316525, now seen corresponding path program 1 times [2022-07-19 09:36:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:43,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077348498] [2022-07-19 09:36:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:44,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:44,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:44,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:36:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:44,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:44,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077348498] [2022-07-19 09:36:44,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077348498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:44,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123744256] [2022-07-19 09:36:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:44,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:44,092 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) [2022-07-19 09:36:44,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:36:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:44,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:36:44,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:44,233 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 [2022-07-19 09:36:44,292 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:44,292 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 [2022-07-19 09:36:44,339 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:36:44,340 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 [2022-07-19 09:36:44,436 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 [2022-07-19 09:36:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 09:36:44,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:44,588 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 [2022-07-19 09:36:44,590 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 [2022-07-19 09:36:44,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123744256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:44,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:44,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-19 09:36:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132144997] [2022-07-19 09:36:44,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:44,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:36:44,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:36:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:36:44,628 INFO L87 Difference]: Start difference. First operand 481 states and 759 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:36:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:45,784 INFO L93 Difference]: Finished difference Result 1217 states and 1879 transitions. [2022-07-19 09:36:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 09:36:45,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 51 [2022-07-19 09:36:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:45,791 INFO L225 Difference]: With dead ends: 1217 [2022-07-19 09:36:45,791 INFO L226 Difference]: Without dead ends: 1215 [2022-07-19 09:36:45,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=2080, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 09:36:45,793 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 237 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:45,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 607 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 750 Invalid, 0 Unknown, 86 Unchecked, 0.5s Time] [2022-07-19 09:36:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-07-19 09:36:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 646. [2022-07-19 09:36:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 462 states have (on average 1.448051948051948) internal successors, (669), 465 states have internal predecessors, (669), 175 states have call successors, (175), 8 states have call predecessors, (175), 8 states have return successors, (175), 172 states have call predecessors, (175), 175 states have call successors, (175) [2022-07-19 09:36:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1019 transitions. [2022-07-19 09:36:45,885 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1019 transitions. Word has length 51 [2022-07-19 09:36:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:45,886 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1019 transitions. [2022-07-19 09:36:45,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:36:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1019 transitions. [2022-07-19 09:36:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 09:36:45,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:45,888 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:45,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:46,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:46,108 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash 881708129, now seen corresponding path program 3 times [2022-07-19 09:36:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:46,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373147578] [2022-07-19 09:36:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:46,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:46,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:46,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:36:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:36:46,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:46,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373147578] [2022-07-19 09:36:46,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373147578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:46,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589528123] [2022-07-19 09:36:46,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:36:46,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:46,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:46,296 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) [2022-07-19 09:36:46,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:36:46,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 09:36:46,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 09:36:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:46,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:36:48,566 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:36:48,567 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 [2022-07-19 09:36:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:48,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:57,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-19 09:36:57,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-19 09:36:57,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589528123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:57,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:57,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-07-19 09:36:57,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434902485] [2022-07-19 09:36:57,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:57,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:36:57,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:36:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=500, Unknown=5, NotChecked=0, Total=600 [2022-07-19 09:36:57,361 INFO L87 Difference]: Start difference. First operand 646 states and 1019 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:37:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:00,362 INFO L93 Difference]: Finished difference Result 1980 states and 3113 transitions. [2022-07-19 09:37:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 09:37:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-07-19 09:37:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:00,372 INFO L225 Difference]: With dead ends: 1980 [2022-07-19 09:37:00,372 INFO L226 Difference]: Without dead ends: 1978 [2022-07-19 09:37:00,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=339, Invalid=1461, Unknown=6, NotChecked=0, Total=1806 [2022-07-19 09:37:00,375 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 277 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:00,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 590 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 535 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2022-07-19 09:37:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-07-19 09:37:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1372. [2022-07-19 09:37:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 980 states have (on average 1.4551020408163264) internal successors, (1426), 983 states have internal predecessors, (1426), 375 states have call successors, (375), 16 states have call predecessors, (375), 16 states have return successors, (375), 372 states have call predecessors, (375), 375 states have call successors, (375) [2022-07-19 09:37:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2176 transitions. [2022-07-19 09:37:00,560 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2176 transitions. Word has length 55 [2022-07-19 09:37:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:00,562 INFO L495 AbstractCegarLoop]: Abstraction has 1372 states and 2176 transitions. [2022-07-19 09:37:00,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:37:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2176 transitions. [2022-07-19 09:37:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 09:37:00,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:00,566 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:00,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:00,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:00,787 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1022256739, now seen corresponding path program 1 times [2022-07-19 09:37:00,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:00,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245201059] [2022-07-19 09:37:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:00,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:00,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:00,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:00,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:00,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:37:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:00,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245201059] [2022-07-19 09:37:00,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245201059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760077204] [2022-07-19 09:37:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:00,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:00,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:00,956 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) [2022-07-19 09:37:00,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:37:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:37:01,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:01,107 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 [2022-07-19 09:37:01,168 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:37:01,168 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 [2022-07-19 09:37:01,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:37:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:37:01,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:01,501 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 [2022-07-19 09:37:01,504 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 [2022-07-19 09:37:01,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760077204] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:01,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:37:01,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-07-19 09:37:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401488909] [2022-07-19 09:37:01,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:01,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:37:01,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:37:01,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:37:01,545 INFO L87 Difference]: Start difference. First operand 1372 states and 2176 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:37:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:03,193 INFO L93 Difference]: Finished difference Result 3737 states and 5871 transitions. [2022-07-19 09:37:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 09:37:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-07-19 09:37:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:03,211 INFO L225 Difference]: With dead ends: 3737 [2022-07-19 09:37:03,211 INFO L226 Difference]: Without dead ends: 3735 [2022-07-19 09:37:03,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=2695, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 09:37:03,215 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 223 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:03,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 835 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1136 Invalid, 0 Unknown, 141 Unchecked, 0.7s Time] [2022-07-19 09:37:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2022-07-19 09:37:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 1856. [2022-07-19 09:37:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1320 states have (on average 1.4606060606060607) internal successors, (1928), 1324 states have internal predecessors, (1928), 511 states have call successors, (511), 24 states have call predecessors, (511), 24 states have return successors, (511), 507 states have call predecessors, (511), 511 states have call successors, (511) [2022-07-19 09:37:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2950 transitions. [2022-07-19 09:37:03,525 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2950 transitions. Word has length 55 [2022-07-19 09:37:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:03,525 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2950 transitions. [2022-07-19 09:37:03,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:37:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2950 transitions. [2022-07-19 09:37:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 09:37:03,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:03,528 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:03,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:03,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 09:37:03,743 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871831, now seen corresponding path program 4 times [2022-07-19 09:37:03,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:03,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729278009] [2022-07-19 09:37:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:03,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:03,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:03,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:03,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:03,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:37:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:03,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:03,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729278009] [2022-07-19 09:37:03,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729278009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780743344] [2022-07-19 09:37:03,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:37:03,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:03,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:03,874 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) [2022-07-19 09:37:03,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 09:37:03,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:37:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 09:37:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:03,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:37:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:04,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:04,121 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 [2022-07-19 09:37:04,122 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 [2022-07-19 09:37:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:04,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780743344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:04,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:04,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 16 [2022-07-19 09:37:04,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787458663] [2022-07-19 09:37:04,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:04,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 09:37:04,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 09:37:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-19 09:37:04,151 INFO L87 Difference]: Start difference. First operand 1856 states and 2950 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 09:37:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:08,141 INFO L93 Difference]: Finished difference Result 15973 states and 25766 transitions. [2022-07-19 09:37:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-19 09:37:08,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2022-07-19 09:37:08,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:08,205 INFO L225 Difference]: With dead ends: 15973 [2022-07-19 09:37:08,205 INFO L226 Difference]: Without dead ends: 15971 [2022-07-19 09:37:08,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=777, Invalid=6195, Unknown=0, NotChecked=0, Total=6972 [2022-07-19 09:37:08,219 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 293 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:08,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1656 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 09:37:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15971 states. [2022-07-19 09:37:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15971 to 5959. [2022-07-19 09:37:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5959 states, 4222 states have (on average 1.4819990525817148) internal successors, (6257), 4222 states have internal predecessors, (6257), 1712 states have call successors, (1712), 24 states have call predecessors, (1712), 24 states have return successors, (1712), 1712 states have call predecessors, (1712), 1712 states have call successors, (1712) [2022-07-19 09:37:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5959 states to 5959 states and 9681 transitions. [2022-07-19 09:37:09,245 INFO L78 Accepts]: Start accepts. Automaton has 5959 states and 9681 transitions. Word has length 59 [2022-07-19 09:37:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:09,245 INFO L495 AbstractCegarLoop]: Abstraction has 5959 states and 9681 transitions. [2022-07-19 09:37:09,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 09:37:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5959 states and 9681 transitions. [2022-07-19 09:37:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 09:37:09,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:09,249 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:09,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:09,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:09,463 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash 58433497, now seen corresponding path program 1 times [2022-07-19 09:37:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:09,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415597710] [2022-07-19 09:37:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:09,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:09,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:09,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:09,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:09,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:09,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:37:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:09,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:09,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415597710] [2022-07-19 09:37:09,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415597710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:09,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572159003] [2022-07-19 09:37:09,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:09,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:09,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:09,609 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) [2022-07-19 09:37:09,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 09:37:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:37:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:09,813 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 [2022-07-19 09:37:10,019 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 [2022-07-19 09:37:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:10,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:10,197 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 [2022-07-19 09:37:10,200 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 [2022-07-19 09:37:10,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572159003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:10,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:37:10,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2022-07-19 09:37:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069875999] [2022-07-19 09:37:10,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:10,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:37:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:37:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-07-19 09:37:10,237 INFO L87 Difference]: Start difference. First operand 5959 states and 9681 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 09:37:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:13,718 INFO L93 Difference]: Finished difference Result 11693 states and 18784 transitions. [2022-07-19 09:37:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-19 09:37:13,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2022-07-19 09:37:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:13,753 INFO L225 Difference]: With dead ends: 11693 [2022-07-19 09:37:13,753 INFO L226 Difference]: Without dead ends: 11691 [2022-07-19 09:37:13,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1049, Invalid=5757, Unknown=0, NotChecked=0, Total=6806 [2022-07-19 09:37:13,765 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 348 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:13,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 922 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 09:37:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2022-07-19 09:37:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 1904. [2022-07-19 09:37:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1368 states have (on average 1.4502923976608186) internal successors, (1984), 1372 states have internal predecessors, (1984), 511 states have call successors, (511), 24 states have call predecessors, (511), 24 states have return successors, (511), 507 states have call predecessors, (511), 511 states have call successors, (511) [2022-07-19 09:37:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 3006 transitions. [2022-07-19 09:37:14,346 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 3006 transitions. Word has length 59 [2022-07-19 09:37:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:14,347 INFO L495 AbstractCegarLoop]: Abstraction has 1904 states and 3006 transitions. [2022-07-19 09:37:14,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 09:37:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 3006 transitions. [2022-07-19 09:37:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 09:37:14,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:14,350 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:14,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 09:37:14,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 09:37:14,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash 819831629, now seen corresponding path program 5 times [2022-07-19 09:37:14,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:14,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240953863] [2022-07-19 09:37:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:14,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:14,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:14,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:14,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:14,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:14,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:37:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:14,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:14,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240953863] [2022-07-19 09:37:14,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240953863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:14,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075056683] [2022-07-19 09:37:14,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:37:14,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:14,892 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) [2022-07-19 09:37:14,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 09:37:15,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 09:37:15,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:37:15,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:15,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:37:15,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075056683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:15,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:15,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-19 09:37:15,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843930347] [2022-07-19 09:37:15,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:15,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 09:37:15,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:15,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 09:37:15,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 09:37:15,709 INFO L87 Difference]: Start difference. First operand 1904 states and 3006 transitions. Second operand has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-19 09:37:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:16,406 INFO L93 Difference]: Finished difference Result 2207 states and 3461 transitions. [2022-07-19 09:37:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 09:37:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 63 [2022-07-19 09:37:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:16,413 INFO L225 Difference]: With dead ends: 2207 [2022-07-19 09:37:16,413 INFO L226 Difference]: Without dead ends: 2179 [2022-07-19 09:37:16,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 09:37:16,415 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 293 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:16,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 204 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:37:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2022-07-19 09:37:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1920. [2022-07-19 09:37:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1384 states have (on average 1.439306358381503) internal successors, (1992), 1384 states have internal predecessors, (1992), 511 states have call successors, (511), 24 states have call predecessors, (511), 24 states have return successors, (511), 511 states have call predecessors, (511), 511 states have call successors, (511) [2022-07-19 09:37:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 3014 transitions. [2022-07-19 09:37:16,820 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 3014 transitions. Word has length 63 [2022-07-19 09:37:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:16,820 INFO L495 AbstractCegarLoop]: Abstraction has 1920 states and 3014 transitions. [2022-07-19 09:37:16,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-19 09:37:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 3014 transitions. [2022-07-19 09:37:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 09:37:16,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:16,824 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:16,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 09:37:17,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 09:37:17,029 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash 374578441, now seen corresponding path program 2 times [2022-07-19 09:37:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:17,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116047080] [2022-07-19 09:37:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:37:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:37:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:37:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:37:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 09:37:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:37:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:37:17,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116047080] [2022-07-19 09:37:17,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116047080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:17,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23947243] [2022-07-19 09:37:17,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:37:17,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:17,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:17,296 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) [2022-07-19 09:37:17,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 09:37:17,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:37:17,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 09:37:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:17,443 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 [2022-07-19 09:37:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,501 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 [2022-07-19 09:37:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,547 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 [2022-07-19 09:37:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,600 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 [2022-07-19 09:37:17,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,659 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 [2022-07-19 09:37:17,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:37:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:37:17,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:37:17,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:37:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:17,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:37:18,005 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 [2022-07-19 09:37:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:37:18,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:18,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23947243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:18,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:37:18,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-19 09:37:18,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144038702] [2022-07-19 09:37:18,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:18,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:37:18,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:18,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:37:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:37:18,192 INFO L87 Difference]: Start difference. First operand 1920 states and 3014 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-19 09:37:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:19,567 INFO L93 Difference]: Finished difference Result 3981 states and 6220 transitions. [2022-07-19 09:37:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 09:37:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-07-19 09:37:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:19,578 INFO L225 Difference]: With dead ends: 3981 [2022-07-19 09:37:19,578 INFO L226 Difference]: Without dead ends: 3979 [2022-07-19 09:37:19,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 107 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 09:37:19,581 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 162 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:19,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 574 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 696 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-07-19 09:37:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-07-19 09:37:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2319. [2022-07-19 09:37:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 1668 states have (on average 1.4490407673860912) internal successors, (2417), 1668 states have internal predecessors, (2417), 625 states have call successors, (625), 25 states have call predecessors, (625), 25 states have return successors, (625), 625 states have call predecessors, (625), 625 states have call successors, (625) [2022-07-19 09:37:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3667 transitions. [2022-07-19 09:37:20,125 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3667 transitions. Word has length 75 [2022-07-19 09:37:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:20,126 INFO L495 AbstractCegarLoop]: Abstraction has 2319 states and 3667 transitions. [2022-07-19 09:37:20,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-19 09:37:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3667 transitions. [2022-07-19 09:37:20,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 09:37:20,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:20,130 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:20,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 09:37:20,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 09:37:20,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1525924609, now seen corresponding path program 2 times [2022-07-19 09:37:20,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:20,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518137826] [2022-07-19 09:37:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:20,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:37:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:37:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:37:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:37:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 09:37:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:37:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:37:20,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518137826] [2022-07-19 09:37:20,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518137826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:20,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053597490] [2022-07-19 09:37:20,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:37:20,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:20,580 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) [2022-07-19 09:37:20,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 09:37:20,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:37:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:20,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 09:37:20,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:20,771 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 [2022-07-19 09:37:20,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:20,848 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 [2022-07-19 09:37:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:20,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-19 09:37:20,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:20,965 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 [2022-07-19 09:37:21,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:21,041 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 26 treesize of output 25 [2022-07-19 09:37:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:21,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:37:21,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:21,137 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 26 treesize of output 25 [2022-07-19 09:37:21,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:21,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:37:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:21,249 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 26 treesize of output 25 [2022-07-19 09:37:21,334 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 [2022-07-19 09:37:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-19 09:37:21,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:21,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053597490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:21,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:37:21,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-19 09:37:21,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070909235] [2022-07-19 09:37:21,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:21,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:37:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:37:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-07-19 09:37:21,570 INFO L87 Difference]: Start difference. First operand 2319 states and 3667 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-19 09:37:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:22,919 INFO L93 Difference]: Finished difference Result 3367 states and 5272 transitions. [2022-07-19 09:37:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 09:37:22,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 79 [2022-07-19 09:37:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:22,928 INFO L225 Difference]: With dead ends: 3367 [2022-07-19 09:37:22,928 INFO L226 Difference]: Without dead ends: 3365 [2022-07-19 09:37:22,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 113 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=1822, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 09:37:22,930 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:22,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 502 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 637 Invalid, 0 Unknown, 112 Unchecked, 0.4s Time] [2022-07-19 09:37:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-07-19 09:37:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2333. [2022-07-19 09:37:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1672 states have (on average 1.4479665071770336) internal successors, (2421), 1680 states have internal predecessors, (2421), 633 states have call successors, (633), 27 states have call predecessors, (633), 27 states have return successors, (633), 625 states have call predecessors, (633), 633 states have call successors, (633) [2022-07-19 09:37:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3687 transitions. [2022-07-19 09:37:23,515 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3687 transitions. Word has length 79 [2022-07-19 09:37:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:23,516 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 3687 transitions. [2022-07-19 09:37:23,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-19 09:37:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3687 transitions. [2022-07-19 09:37:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 09:37:23,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:23,521 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:23,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:23,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 09:37:23,727 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash -375078701, now seen corresponding path program 6 times [2022-07-19 09:37:23,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:23,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288414152] [2022-07-19 09:37:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:23,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:37:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:37:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:37:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:37:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 09:37:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:37:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:37:23,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:23,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288414152] [2022-07-19 09:37:23,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288414152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:23,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968774001] [2022-07-19 09:37:23,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:37:23,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:23,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:23,917 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) [2022-07-19 09:37:23,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 09:37:24,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-19 09:37:24,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 09:37:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:24,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:32,248 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:37:32,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:37:40,318 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:37:40,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:37:48,391 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:37:48,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:37:56,472 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:37:56,472 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 [2022-07-19 09:37:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 09:37:56,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:58,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-19 09:37:58,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-19 09:37:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:37:58,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968774001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:58,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:58,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 26 [2022-07-19 09:37:58,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435777217] [2022-07-19 09:37:58,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:58,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:37:58,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:58,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:37:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=547, Unknown=5, NotChecked=0, Total=650 [2022-07-19 09:37:58,841 INFO L87 Difference]: Start difference. First operand 2333 states and 3687 transitions. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2022-07-19 09:40:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:04,279 INFO L93 Difference]: Finished difference Result 25313 states and 41091 transitions. [2022-07-19 09:40:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-19 09:40:04,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 95 [2022-07-19 09:40:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:04,340 INFO L225 Difference]: With dead ends: 25313 [2022-07-19 09:40:04,341 INFO L226 Difference]: Without dead ends: 25311 [2022-07-19 09:40:04,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 199 SyntacticMatches, 24 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5741 ImplicationChecksByTransitivity, 151.9s TimeCoverageRelationStatistics Valid=1363, Invalid=11456, Unknown=63, NotChecked=0, Total=12882 [2022-07-19 09:40:04,354 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 481 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 5406 mSolverCounterSat, 1228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 7436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1228 IncrementalHoareTripleChecker+Valid, 5406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 802 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:04,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 2424 Invalid, 7436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1228 Valid, 5406 Invalid, 0 Unknown, 802 Unchecked, 2.9s Time] [2022-07-19 09:40:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25311 states. [2022-07-19 09:40:05,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25311 to 4563. [2022-07-19 09:40:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 3268 states have (on average 1.464810281517748) internal successors, (4787), 3276 states have internal predecessors, (4787), 1263 states have call successors, (1263), 31 states have call predecessors, (1263), 31 states have return successors, (1263), 1255 states have call predecessors, (1263), 1263 states have call successors, (1263) [2022-07-19 09:40:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 7313 transitions. [2022-07-19 09:40:05,820 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 7313 transitions. Word has length 95 [2022-07-19 09:40:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:05,820 INFO L495 AbstractCegarLoop]: Abstraction has 4563 states and 7313 transitions. [2022-07-19 09:40:05,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2022-07-19 09:40:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 7313 transitions. [2022-07-19 09:40:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 09:40:05,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:05,830 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:05,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:06,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:06,054 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:06,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:06,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1891302485, now seen corresponding path program 1 times [2022-07-19 09:40:06,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:06,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281269306] [2022-07-19 09:40:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:06,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:40:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:40:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:40:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:40:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:40:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:40:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:40:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:40:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 09:40:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:40:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:40:06,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281269306] [2022-07-19 09:40:06,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281269306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31224289] [2022-07-19 09:40:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:06,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:06,248 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) [2022-07-19 09:40:06,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 09:40:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 09:40:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:06,480 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 [2022-07-19 09:40:06,548 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:06,548 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 [2022-07-19 09:40:06,607 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:06,608 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 [2022-07-19 09:40:06,659 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:06,660 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 [2022-07-19 09:40:06,710 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:40:06,710 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 [2022-07-19 09:40:06,893 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 [2022-07-19 09:40:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 09:40:06,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:07,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:40:07,186 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 [2022-07-19 09:40:07,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31224289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:07,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:40:07,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-19 09:40:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232960178] [2022-07-19 09:40:07,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:07,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:40:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:40:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 09:40:07,220 INFO L87 Difference]: Start difference. First operand 4563 states and 7313 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-19 09:40:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:40:17,137 INFO L93 Difference]: Finished difference Result 21987 states and 35672 transitions. [2022-07-19 09:40:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-19 09:40:17,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 95 [2022-07-19 09:40:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:40:17,173 INFO L225 Difference]: With dead ends: 21987 [2022-07-19 09:40:17,174 INFO L226 Difference]: Without dead ends: 21985 [2022-07-19 09:40:17,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=530, Invalid=4298, Unknown=2, NotChecked=0, Total=4830 [2022-07-19 09:40:17,183 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 346 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:40:17,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 950 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 1765 Invalid, 0 Unknown, 151 Unchecked, 0.9s Time] [2022-07-19 09:40:17,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21985 states. [2022-07-19 09:40:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21985 to 4687. [2022-07-19 09:40:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 3372 states have (on average 1.4647093712930013) internal successors, (4939), 3372 states have internal predecessors, (4939), 1279 states have call successors, (1279), 35 states have call predecessors, (1279), 35 states have return successors, (1279), 1279 states have call predecessors, (1279), 1279 states have call successors, (1279) [2022-07-19 09:40:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 7497 transitions. [2022-07-19 09:40:18,693 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 7497 transitions. Word has length 95 [2022-07-19 09:40:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:40:18,694 INFO L495 AbstractCegarLoop]: Abstraction has 4687 states and 7497 transitions. [2022-07-19 09:40:18,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-19 09:40:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 7497 transitions. [2022-07-19 09:40:18,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 09:40:18,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:40:18,705 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:40:18,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 09:40:18,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 09:40:18,919 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:40:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:40:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 500947145, now seen corresponding path program 7 times [2022-07-19 09:40:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:40:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515660666] [2022-07-19 09:40:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:40:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:40:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:40:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:40:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:40:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:40:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 09:40:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:40:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:40:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:40:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 09:40:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:40:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:40:19,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:40:19,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515660666] [2022-07-19 09:40:19,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515660666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:40:19,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872453206] [2022-07-19 09:40:19,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:40:19,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:40:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:40:19,104 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) [2022-07-19 09:40:19,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 09:40:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:40:19,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 09:40:19,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:40:19,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:40:19,280 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:19,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:19,309 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:19,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:19,333 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:40:19,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:40:19,547 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:40:19,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-19 09:40:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:40:19,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:40:19,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:40:19,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:40:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:40:19,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872453206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:40:19,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:40:19,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-07-19 09:40:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46873579] [2022-07-19 09:40:19,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:40:19,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:40:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:40:19,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:40:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-19 09:40:19,748 INFO L87 Difference]: Start difference. First operand 4687 states and 7497 transitions. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13)