./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/pr4.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 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:39:11,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:39:11,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:39:11,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:39:11,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:39:11,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:39:11,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:39:11,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:39:11,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:39:11,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:39:11,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:39:11,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:39:11,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:39:11,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:39:11,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:39:11,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:39:11,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:39:11,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:39:11,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:39:11,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:39:11,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:39:11,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:39:11,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:39:11,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:39:11,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:39:11,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:39:11,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:39:11,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:39:11,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:39:11,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:39:11,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:39:11,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:39:11,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:39:11,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:39:11,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:39:11,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:39:11,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:39:11,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:39:11,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:39:11,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:39:11,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:39:11,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:39:11,201 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:39:11,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:39:11,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:39:11,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:39:11,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:39:11,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:39:11,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:39:11,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:39:11,203 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:39:11,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:39:11,204 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:39:11,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:39:11,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:39:11,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:39:11,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:39:11,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:39:11,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:39:11,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:39:11,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:39:11,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:39:11,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:39:11,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:39:11,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:39:11,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:39:11,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:39:11,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:39:11,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:39:11,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:39:11,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:39:11,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:39:11,208 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:39:11,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:39:11,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:39:11,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:39:11,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f [2021-12-15 08:39:11,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:39:11,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:39:11,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:39:11,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:39:11,465 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:39:11,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr4.c [2021-12-15 08:39:11,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ea500ee/4fd3d535f31c451b9763693a47e2580e/FLAG7ffb29bb8 [2021-12-15 08:39:11,944 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:39:11,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr4.c [2021-12-15 08:39:11,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ea500ee/4fd3d535f31c451b9763693a47e2580e/FLAG7ffb29bb8 [2021-12-15 08:39:11,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ea500ee/4fd3d535f31c451b9763693a47e2580e [2021-12-15 08:39:11,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:39:11,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:39:11,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:39:11,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:39:11,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:39:11,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:39:11" (1/1) ... [2021-12-15 08:39:11,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435b1fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:11, skipping insertion in model container [2021-12-15 08:39:11,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:39:11" (1/1) ... [2021-12-15 08:39:11,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:39:12,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:39:12,163 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/pr4.c[394,407] [2021-12-15 08:39:12,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:39:12,184 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:39:12,194 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/pr4.c[394,407] [2021-12-15 08:39:12,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:39:12,213 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:39:12,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12 WrapperNode [2021-12-15 08:39:12,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:39:12,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:39:12,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:39:12,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:39:12,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,249 INFO L137 Inliner]: procedures = 15, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2021-12-15 08:39:12,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:39:12,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:39:12,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:39:12,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:39:12,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:39:12,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:39:12,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:39:12,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:39:12,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (1/1) ... [2021-12-15 08:39:12,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:39:12,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:12,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:39:12,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:39:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:39:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:39:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:39:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:39:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:39:12,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:39:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:39:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:39:12,425 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:39:12,427 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:39:12,542 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:39:12,547 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:39:12,547 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 08:39:12,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:39:12 BoogieIcfgContainer [2021-12-15 08:39:12,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:39:12,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:39:12,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:39:12,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:39:12,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:39:11" (1/3) ... [2021-12-15 08:39:12,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34aa12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:39:12, skipping insertion in model container [2021-12-15 08:39:12,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:12" (2/3) ... [2021-12-15 08:39:12,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34aa12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:39:12, skipping insertion in model container [2021-12-15 08:39:12,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:39:12" (3/3) ... [2021-12-15 08:39:12,555 INFO L111 eAbstractionObserver]: Analyzing ICFG pr4.c [2021-12-15 08:39:12,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:39:12,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:39:12,610 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:39:12,615 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:39:12,630 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:39:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:39:12,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:12,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:12,657 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -260661418, now seen corresponding path program 1 times [2021-12-15 08:39:12,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:12,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577981646] [2021-12-15 08:39:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:12,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:12,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:12,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577981646] [2021-12-15 08:39:12,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577981646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:12,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:12,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:39:12,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362229660] [2021-12-15 08:39:12,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:12,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:39:12,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:39:12,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:39:12,912 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:12,935 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2021-12-15 08:39:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:39:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:39:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:12,944 INFO L225 Difference]: With dead ends: 47 [2021-12-15 08:39:12,944 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 08:39:12,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:39:12,952 INFO L933 BasicCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:12,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 08:39:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-15 08:39:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-12-15 08:39:12,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2021-12-15 08:39:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:12,984 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-15 08:39:12,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-12-15 08:39:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:39:12,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:12,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:12,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:39:12,986 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash 451593979, now seen corresponding path program 1 times [2021-12-15 08:39:12,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:12,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376427956] [2021-12-15 08:39:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:12,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:13,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:13,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376427956] [2021-12-15 08:39:13,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376427956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:13,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:13,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:39:13,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468813918] [2021-12-15 08:39:13,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:13,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:39:13,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:39:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:39:13,104 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:13,141 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-12-15 08:39:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:39:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:39:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:13,143 INFO L225 Difference]: With dead ends: 30 [2021-12-15 08:39:13,144 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 08:39:13,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:39:13,148 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:13,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 08:39:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-15 08:39:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-12-15 08:39:13,157 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2021-12-15 08:39:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:13,158 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-12-15 08:39:13,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-12-15 08:39:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:39:13,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:13,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:13,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:39:13,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:13,163 INFO L85 PathProgramCache]: Analyzing trace with hash 451653561, now seen corresponding path program 1 times [2021-12-15 08:39:13,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:13,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485596519] [2021-12-15 08:39:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:13,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:13,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485596519] [2021-12-15 08:39:13,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485596519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:13,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:13,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:39:13,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128729256] [2021-12-15 08:39:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:13,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:39:13,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:39:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:39:13,329 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:13,376 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-12-15 08:39:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:39:13,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:39:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:13,377 INFO L225 Difference]: With dead ends: 40 [2021-12-15 08:39:13,377 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 08:39:13,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:39:13,378 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:13,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 08:39:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-15 08:39:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-15 08:39:13,388 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 13 [2021-12-15 08:39:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:13,389 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-15 08:39:13,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-15 08:39:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 08:39:13,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:13,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:13,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:39:13,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1654662766, now seen corresponding path program 1 times [2021-12-15 08:39:13,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:13,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717311981] [2021-12-15 08:39:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:13,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:13,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:13,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717311981] [2021-12-15 08:39:13,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717311981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:13,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75124832] [2021-12-15 08:39:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:13,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:13,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:13,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:13,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:39:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:13,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 08:39:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:13,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:13,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:13,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:13,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:13,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:13,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 08:39:13,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:39:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:13,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:14,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 08:39:14,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-15 08:39:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:14,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75124832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:14,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:14,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2021-12-15 08:39:14,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627260216] [2021-12-15 08:39:14,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:14,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 08:39:14,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 08:39:14,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-12-15 08:39:14,148 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:14,796 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-12-15 08:39:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 08:39:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 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 19 [2021-12-15 08:39:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:14,799 INFO L225 Difference]: With dead ends: 120 [2021-12-15 08:39:14,799 INFO L226 Difference]: Without dead ends: 110 [2021-12-15 08:39:14,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 08:39:14,801 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:14,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 131 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:39:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-15 08:39:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 33. [2021-12-15 08:39:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-12-15 08:39:14,808 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 19 [2021-12-15 08:39:14,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:14,809 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-12-15 08:39:14,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-12-15 08:39:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 08:39:14,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:14,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:14,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:15,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:15,032 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1912828204, now seen corresponding path program 1 times [2021-12-15 08:39:15,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:15,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940358145] [2021-12-15 08:39:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:15,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:15,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:15,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940358145] [2021-12-15 08:39:15,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940358145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:15,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:15,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:39:15,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540579259] [2021-12-15 08:39:15,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:15,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:39:15,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:39:15,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:39:15,081 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:15,107 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-12-15 08:39:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:39:15,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 08:39:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:15,108 INFO L225 Difference]: With dead ends: 60 [2021-12-15 08:39:15,108 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 08:39:15,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:39:15,109 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:15,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 49 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 08:39:15,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-15 08:39:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-15 08:39:15,114 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 19 [2021-12-15 08:39:15,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:15,115 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-15 08:39:15,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-15 08:39:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 08:39:15,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:15,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:15,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 08:39:15,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1519801194, now seen corresponding path program 1 times [2021-12-15 08:39:15,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:15,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137550885] [2021-12-15 08:39:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:15,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:15,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137550885] [2021-12-15 08:39:15,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137550885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:15,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130453014] [2021-12-15 08:39:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:15,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:15,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:15,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:15,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:39:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-15 08:39:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:15,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:15,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:15,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:15,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:15,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 08:39:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:15,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:15,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 08:39:15,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-15 08:39:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:15,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130453014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:15,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:15,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2021-12-15 08:39:15,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465660538] [2021-12-15 08:39:15,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:15,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:39:15,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:39:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:39:15,555 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:15,907 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2021-12-15 08:39:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 08:39:15,908 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 08:39:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:15,909 INFO L225 Difference]: With dead ends: 103 [2021-12-15 08:39:15,909 INFO L226 Difference]: Without dead ends: 101 [2021-12-15 08:39:15,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-12-15 08:39:15,910 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:15,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 107 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:39:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-15 08:39:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 43. [2021-12-15 08:39:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-12-15 08:39:15,916 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 19 [2021-12-15 08:39:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:15,917 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-12-15 08:39:15,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-12-15 08:39:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:39:15,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:15,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:15,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:16,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 08:39:16,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2022900031, now seen corresponding path program 1 times [2021-12-15 08:39:16,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:16,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124440921] [2021-12-15 08:39:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:16,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:16,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:16,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124440921] [2021-12-15 08:39:16,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124440921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:16,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596503468] [2021-12-15 08:39:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:16,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:16,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:16,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:16,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:39:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:16,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 08:39:16,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:16,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:16,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:16,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:16,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:39:16,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:39:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:16,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:16,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:16,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 08:39:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:16,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596503468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:16,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:16,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-15 08:39:16,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724327782] [2021-12-15 08:39:16,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:16,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 08:39:16,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 08:39:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-12-15 08:39:16,977 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:18,063 INFO L93 Difference]: Finished difference Result 189 states and 243 transitions. [2021-12-15 08:39:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 08:39:18,063 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 08:39:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:18,065 INFO L225 Difference]: With dead ends: 189 [2021-12-15 08:39:18,065 INFO L226 Difference]: Without dead ends: 163 [2021-12-15 08:39:18,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=1865, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 08:39:18,066 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 415 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:18,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 177 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:39:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-15 08:39:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 62. [2021-12-15 08:39:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-12-15 08:39:18,083 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 25 [2021-12-15 08:39:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:18,084 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-12-15 08:39:18,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-12-15 08:39:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:39:18,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:18,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:18,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:18,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1855836577, now seen corresponding path program 1 times [2021-12-15 08:39:18,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:18,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218185410] [2021-12-15 08:39:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:18,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:18,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:18,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218185410] [2021-12-15 08:39:18,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218185410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:18,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:18,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:39:18,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58535358] [2021-12-15 08:39:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:18,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:39:18,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:39:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:18,324 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:18,339 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2021-12-15 08:39:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:39:18,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-15 08:39:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:18,340 INFO L225 Difference]: With dead ends: 94 [2021-12-15 08:39:18,341 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 08:39:18,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:18,342 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:18,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 41 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 08:39:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-12-15 08:39:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-15 08:39:18,347 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 25 [2021-12-15 08:39:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:18,347 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-15 08:39:18,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-15 08:39:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:39:18,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:18,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:18,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 08:39:18,349 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:18,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1963473599, now seen corresponding path program 1 times [2021-12-15 08:39:18,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:18,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546081434] [2021-12-15 08:39:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:18,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:18,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546081434] [2021-12-15 08:39:18,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546081434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:18,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463615040] [2021-12-15 08:39:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:18,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:18,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:18,483 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:18,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:39:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 08:39:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:18,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:18,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:18,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:18,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:39:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:18,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:18,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:18,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:18,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463615040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:18,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:18,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 15 [2021-12-15 08:39:18,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641090951] [2021-12-15 08:39:18,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:18,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 08:39:18,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 08:39:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-15 08:39:18,801 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:19,188 INFO L93 Difference]: Finished difference Result 144 states and 179 transitions. [2021-12-15 08:39:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 08:39:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 08:39:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:19,189 INFO L225 Difference]: With dead ends: 144 [2021-12-15 08:39:19,189 INFO L226 Difference]: Without dead ends: 142 [2021-12-15 08:39:19,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 08:39:19,191 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 160 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:19,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 120 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:39:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-15 08:39:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 65. [2021-12-15 08:39:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2021-12-15 08:39:19,197 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 25 [2021-12-15 08:39:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:19,198 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2021-12-15 08:39:19,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2021-12-15 08:39:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 08:39:19,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:19,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:19,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:19,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:19,415 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1272777940, now seen corresponding path program 2 times [2021-12-15 08:39:19,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:19,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454258632] [2021-12-15 08:39:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:19,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:19,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:19,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454258632] [2021-12-15 08:39:19,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454258632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:19,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648983624] [2021-12-15 08:39:19,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:39:19,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:19,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:19,511 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:19,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:39:19,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:39:19,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:19,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 08:39:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:19,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:19,615 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 08:39:19,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:39:19,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 08:39:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:19,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:19,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:19,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:19,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648983624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:19,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:19,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2021-12-15 08:39:19,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687971889] [2021-12-15 08:39:19,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:19,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:39:19,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:39:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:39:19,801 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:20,175 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-12-15 08:39:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 08:39:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 08:39:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:20,177 INFO L225 Difference]: With dead ends: 196 [2021-12-15 08:39:20,177 INFO L226 Difference]: Without dead ends: 186 [2021-12-15 08:39:20,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-12-15 08:39:20,178 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:20,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 107 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:39:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-15 08:39:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 86. [2021-12-15 08:39:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 85 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2021-12-15 08:39:20,186 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 31 [2021-12-15 08:39:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:20,186 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2021-12-15 08:39:20,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2021-12-15 08:39:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 08:39:20,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:20,187 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:20,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:20,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 08:39:20,388 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:20,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:20,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1491632658, now seen corresponding path program 1 times [2021-12-15 08:39:20,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:20,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364096418] [2021-12-15 08:39:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:20,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:20,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:20,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364096418] [2021-12-15 08:39:20,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364096418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:20,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863871794] [2021-12-15 08:39:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:20,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:20,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:20,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:20,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:39:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 08:39:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:20,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:20,562 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 08:39:20,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:39:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:20,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:20,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:20,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:20,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863871794] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:20,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:20,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2021-12-15 08:39:20,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383831496] [2021-12-15 08:39:20,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:20,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 08:39:20,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 08:39:20,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:39:20,763 INFO L87 Difference]: Start difference. First operand 86 states and 111 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:21,326 INFO L93 Difference]: Finished difference Result 313 states and 403 transitions. [2021-12-15 08:39:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-15 08:39:21,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 08:39:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:21,328 INFO L225 Difference]: With dead ends: 313 [2021-12-15 08:39:21,328 INFO L226 Difference]: Without dead ends: 311 [2021-12-15 08:39:21,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 08:39:21,330 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:21,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 144 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:39:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-15 08:39:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 123. [2021-12-15 08:39:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2950819672131149) internal successors, (158), 122 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2021-12-15 08:39:21,340 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 31 [2021-12-15 08:39:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:21,341 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2021-12-15 08:39:21,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2021-12-15 08:39:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 08:39:21,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:21,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:21,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:21,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:21,565 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:21,566 INFO L85 PathProgramCache]: Analyzing trace with hash -613557008, now seen corresponding path program 1 times [2021-12-15 08:39:21,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:21,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959475868] [2021-12-15 08:39:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:21,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:39:21,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959475868] [2021-12-15 08:39:21,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959475868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:21,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:21,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:39:21,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237094299] [2021-12-15 08:39:21,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:21,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:39:21,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:39:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:21,587 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:21,606 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2021-12-15 08:39:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:39:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 08:39:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:21,608 INFO L225 Difference]: With dead ends: 172 [2021-12-15 08:39:21,608 INFO L226 Difference]: Without dead ends: 139 [2021-12-15 08:39:21,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:21,609 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:21,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-15 08:39:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 123. [2021-12-15 08:39:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.278688524590164) internal successors, (156), 122 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2021-12-15 08:39:21,623 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 31 [2021-12-15 08:39:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:21,624 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2021-12-15 08:39:21,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2021-12-15 08:39:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 08:39:21,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:21,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:21,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 08:39:21,626 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash -830647440, now seen corresponding path program 2 times [2021-12-15 08:39:21,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:21,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232107613] [2021-12-15 08:39:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:21,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:39:21,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232107613] [2021-12-15 08:39:21,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232107613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:21,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:21,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:39:21,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931829898] [2021-12-15 08:39:21,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:21,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:39:21,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:39:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:21,648 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:21,665 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2021-12-15 08:39:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:39:21,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 08:39:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:21,667 INFO L225 Difference]: With dead ends: 155 [2021-12-15 08:39:21,667 INFO L226 Difference]: Without dead ends: 122 [2021-12-15 08:39:21,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:21,668 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:21,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 55 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-15 08:39:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2021-12-15 08:39:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.2666666666666666) internal successors, (133), 105 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2021-12-15 08:39:21,675 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 31 [2021-12-15 08:39:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:21,675 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2021-12-15 08:39:21,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2021-12-15 08:39:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 08:39:21,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:21,676 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:21,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 08:39:21,676 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2136932185, now seen corresponding path program 3 times [2021-12-15 08:39:21,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:21,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104511910] [2021-12-15 08:39:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:21,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:21,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104511910] [2021-12-15 08:39:21,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104511910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106873476] [2021-12-15 08:39:21,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:39:21,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:21,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:21,837 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:21,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:39:21,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 08:39:21,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 08:39:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:21,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 08:39:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:22,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:22,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:22,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106873476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:22,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:22,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2021-12-15 08:39:22,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218739448] [2021-12-15 08:39:22,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:22,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 08:39:22,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 08:39:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-12-15 08:39:22,251 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:23,585 INFO L93 Difference]: Finished difference Result 437 states and 528 transitions. [2021-12-15 08:39:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-15 08:39:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 08:39:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:23,587 INFO L225 Difference]: With dead ends: 437 [2021-12-15 08:39:23,587 INFO L226 Difference]: Without dead ends: 435 [2021-12-15 08:39:23,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=856, Invalid=4546, Unknown=0, NotChecked=0, Total=5402 [2021-12-15 08:39:23,589 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 291 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:23,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 249 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:39:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-15 08:39:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 232. [2021-12-15 08:39:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.2943722943722944) internal successors, (299), 231 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 299 transitions. [2021-12-15 08:39:23,602 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 299 transitions. Word has length 37 [2021-12-15 08:39:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:23,603 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 299 transitions. [2021-12-15 08:39:23,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 299 transitions. [2021-12-15 08:39:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 08:39:23,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:23,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:23,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:23,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:23,819 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash 234807077, now seen corresponding path program 1 times [2021-12-15 08:39:23,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:23,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062755676] [2021-12-15 08:39:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:23,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:24,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062755676] [2021-12-15 08:39:24,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062755676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754239332] [2021-12-15 08:39:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:24,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:24,002 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:24,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:39:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:24,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 08:39:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:24,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 08:39:24,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 08:39:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:24,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:24,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:24,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754239332] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:24,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:24,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-12-15 08:39:24,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373596067] [2021-12-15 08:39:24,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:24,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 08:39:24,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 08:39:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-12-15 08:39:24,382 INFO L87 Difference]: Start difference. First operand 232 states and 299 transitions. Second operand has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:25,331 INFO L93 Difference]: Finished difference Result 568 states and 706 transitions. [2021-12-15 08:39:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 08:39:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 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 37 [2021-12-15 08:39:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:25,333 INFO L225 Difference]: With dead ends: 568 [2021-12-15 08:39:25,333 INFO L226 Difference]: Without dead ends: 485 [2021-12-15 08:39:25,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=481, Invalid=2275, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 08:39:25,335 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 163 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:25,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 242 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 08:39:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-15 08:39:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 313. [2021-12-15 08:39:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.2628205128205128) internal successors, (394), 312 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 394 transitions. [2021-12-15 08:39:25,357 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 394 transitions. Word has length 37 [2021-12-15 08:39:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:25,359 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 394 transitions. [2021-12-15 08:39:25,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 394 transitions. [2021-12-15 08:39:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 08:39:25,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:25,361 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:25,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:25,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 08:39:25,574 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:25,574 INFO L85 PathProgramCache]: Analyzing trace with hash -81425862, now seen corresponding path program 4 times [2021-12-15 08:39:25,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:25,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793824235] [2021-12-15 08:39:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:25,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:25,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793824235] [2021-12-15 08:39:25,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793824235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:25,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375889294] [2021-12-15 08:39:25,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:39:25,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:25,860 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:25,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:39:25,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:39:25,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:25,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 08:39:25,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:26,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:26,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375889294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:26,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:26,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2021-12-15 08:39:26,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511270373] [2021-12-15 08:39:26,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:26,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 08:39:26,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 08:39:26,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-12-15 08:39:26,557 INFO L87 Difference]: Start difference. First operand 313 states and 394 transitions. Second operand has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:26,785 INFO L93 Difference]: Finished difference Result 486 states and 581 transitions. [2021-12-15 08:39:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 08:39:26,786 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 0 states have call successors, (0), 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 43 [2021-12-15 08:39:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:26,787 INFO L225 Difference]: With dead ends: 486 [2021-12-15 08:39:26,787 INFO L226 Difference]: Without dead ends: 375 [2021-12-15 08:39:26,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=927, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 08:39:26,789 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 349 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:26,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 138 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:39:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-15 08:39:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 317. [2021-12-15 08:39:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.240506329113924) internal successors, (392), 316 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 392 transitions. [2021-12-15 08:39:26,808 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 392 transitions. Word has length 43 [2021-12-15 08:39:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:26,809 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 392 transitions. [2021-12-15 08:39:26,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 392 transitions. [2021-12-15 08:39:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 08:39:26,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:26,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:26,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:27,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 08:39:27,019 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:27,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1283752644, now seen corresponding path program 1 times [2021-12-15 08:39:27,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:27,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547603095] [2021-12-15 08:39:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:27,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 08:39:27,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547603095] [2021-12-15 08:39:27,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547603095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:27,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:27,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:39:27,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160277014] [2021-12-15 08:39:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:27,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:39:27,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:39:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:27,049 INFO L87 Difference]: Start difference. First operand 317 states and 392 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:27,081 INFO L93 Difference]: Finished difference Result 571 states and 693 transitions. [2021-12-15 08:39:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:39:27,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 43 [2021-12-15 08:39:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:27,083 INFO L225 Difference]: With dead ends: 571 [2021-12-15 08:39:27,083 INFO L226 Difference]: Without dead ends: 389 [2021-12-15 08:39:27,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:27,085 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:27,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-15 08:39:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 323. [2021-12-15 08:39:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.2173913043478262) internal successors, (392), 322 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 392 transitions. [2021-12-15 08:39:27,105 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 392 transitions. Word has length 43 [2021-12-15 08:39:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:27,105 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 392 transitions. [2021-12-15 08:39:27,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 392 transitions. [2021-12-15 08:39:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 08:39:27,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:27,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:27,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 08:39:27,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash 548376636, now seen corresponding path program 2 times [2021-12-15 08:39:27,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:27,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705759309] [2021-12-15 08:39:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:27,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:39:27,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:27,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705759309] [2021-12-15 08:39:27,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705759309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:27,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:27,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:39:27,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909489997] [2021-12-15 08:39:27,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:27,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:39:27,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:39:27,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:27,149 INFO L87 Difference]: Start difference. First operand 323 states and 392 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:27,185 INFO L93 Difference]: Finished difference Result 407 states and 482 transitions. [2021-12-15 08:39:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:39:27,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 43 [2021-12-15 08:39:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:27,187 INFO L225 Difference]: With dead ends: 407 [2021-12-15 08:39:27,187 INFO L226 Difference]: Without dead ends: 290 [2021-12-15 08:39:27,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:27,189 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:27,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-15 08:39:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 257. [2021-12-15 08:39:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.19921875) internal successors, (307), 256 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 307 transitions. [2021-12-15 08:39:27,203 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 307 transitions. Word has length 43 [2021-12-15 08:39:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:27,203 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 307 transitions. [2021-12-15 08:39:27,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 307 transitions. [2021-12-15 08:39:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 08:39:27,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:27,204 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:27,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 08:39:27,205 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash -457370065, now seen corresponding path program 5 times [2021-12-15 08:39:27,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:27,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545674375] [2021-12-15 08:39:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:27,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:27,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545674375] [2021-12-15 08:39:27,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545674375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587868488] [2021-12-15 08:39:27,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:39:27,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:27,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:27,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:27,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 08:39:27,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 08:39:27,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:27,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 08:39:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:27,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:27,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:27,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:39:27,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:27,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:39:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:27,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:39:27,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 08:39:27,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:39:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:39:27,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:30,279 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_387 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_93| 16) (- 4)) v_ArrVal_387) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-15 08:39:30,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-15 08:39:30,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2021-12-15 08:39:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2021-12-15 08:39:30,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587868488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:30,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:30,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 33 [2021-12-15 08:39:30,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543840198] [2021-12-15 08:39:30,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:30,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 08:39:30,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 08:39:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=895, Unknown=1, NotChecked=60, Total=1056 [2021-12-15 08:39:30,414 INFO L87 Difference]: Start difference. First operand 257 states and 307 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:32,594 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (= |c_ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= 0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_387 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_93| 16) (- 4)) v_ArrVal_387) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 16) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4))) 0) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2021-12-15 08:39:34,611 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (< (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (= |c_ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= 0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_387 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_93| 16) (- 4)) v_ArrVal_387) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 16) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4))) 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2021-12-15 08:39:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:37,583 INFO L93 Difference]: Finished difference Result 698 states and 794 transitions. [2021-12-15 08:39:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-15 08:39:37,584 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 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 49 [2021-12-15 08:39:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:37,586 INFO L225 Difference]: With dead ends: 698 [2021-12-15 08:39:37,586 INFO L226 Difference]: Without dead ends: 688 [2021-12-15 08:39:37,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4045 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1359, Invalid=12222, Unknown=3, NotChecked=696, Total=14280 [2021-12-15 08:39:37,590 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 612 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:37,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 858 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2053 Invalid, 0 Unknown, 244 Unchecked, 1.1s Time] [2021-12-15 08:39:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-15 08:39:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 335. [2021-12-15 08:39:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.1646706586826348) internal successors, (389), 334 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 389 transitions. [2021-12-15 08:39:37,614 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 389 transitions. Word has length 49 [2021-12-15 08:39:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:37,614 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 389 transitions. [2021-12-15 08:39:37,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 389 transitions. [2021-12-15 08:39:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 08:39:37,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:37,616 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:37,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:37,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:37,843 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -171220375, now seen corresponding path program 2 times [2021-12-15 08:39:37,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:37,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445100534] [2021-12-15 08:39:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:37,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:37,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:37,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445100534] [2021-12-15 08:39:37,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445100534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:37,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974870582] [2021-12-15 08:39:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:39:37,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:37,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:37,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:37,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 08:39:38,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:39:38,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:38,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 08:39:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:38,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:38,135 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:38,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:38,153 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:38,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:38,167 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:38,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:38,349 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-15 08:39:38,350 INFO L388 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 24 treesize of output 10 [2021-12-15 08:39:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:38,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:38,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 08:39:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:38,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974870582] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:38,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:38,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 17 [2021-12-15 08:39:38,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271327200] [2021-12-15 08:39:38,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:38,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:39:38,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:39:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:39:38,532 INFO L87 Difference]: Start difference. First operand 335 states and 389 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:39,649 INFO L93 Difference]: Finished difference Result 643 states and 725 transitions. [2021-12-15 08:39:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-15 08:39:39,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 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 49 [2021-12-15 08:39:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:39,651 INFO L225 Difference]: With dead ends: 643 [2021-12-15 08:39:39,651 INFO L226 Difference]: Without dead ends: 633 [2021-12-15 08:39:39,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 08:39:39,653 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 112 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:39,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 386 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:39:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-12-15 08:39:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 355. [2021-12-15 08:39:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.1610169491525424) internal successors, (411), 354 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 411 transitions. [2021-12-15 08:39:39,678 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 411 transitions. Word has length 49 [2021-12-15 08:39:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:39,678 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 411 transitions. [2021-12-15 08:39:39,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 411 transitions. [2021-12-15 08:39:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 08:39:39,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:39,679 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:39,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:39,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:39,887 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:39,888 INFO L85 PathProgramCache]: Analyzing trace with hash -317440667, now seen corresponding path program 1 times [2021-12-15 08:39:39,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:39,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225789020] [2021-12-15 08:39:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:39,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:40,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:40,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225789020] [2021-12-15 08:39:40,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225789020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:40,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822528351] [2021-12-15 08:39:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:40,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:40,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:40,032 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:40,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 08:39:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:40,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 08:39:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:40,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:40,150 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:40,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:40,171 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:40,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:40,189 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:40,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:40,396 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-15 08:39:40,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-15 08:39:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:40,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:40,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:40,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:40,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822528351] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:40,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:40,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2021-12-15 08:39:40,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871237132] [2021-12-15 08:39:40,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:40,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 08:39:40,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:40,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 08:39:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-15 08:39:40,570 INFO L87 Difference]: Start difference. First operand 355 states and 411 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:42,063 INFO L93 Difference]: Finished difference Result 733 states and 833 transitions. [2021-12-15 08:39:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-15 08:39:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 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 49 [2021-12-15 08:39:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:42,066 INFO L225 Difference]: With dead ends: 733 [2021-12-15 08:39:42,066 INFO L226 Difference]: Without dead ends: 731 [2021-12-15 08:39:42,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=896, Invalid=7476, Unknown=0, NotChecked=0, Total=8372 [2021-12-15 08:39:42,069 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 267 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:42,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 260 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:39:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-15 08:39:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 369. [2021-12-15 08:39:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.1603260869565217) internal successors, (427), 368 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 427 transitions. [2021-12-15 08:39:42,096 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 427 transitions. Word has length 49 [2021-12-15 08:39:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:42,097 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 427 transitions. [2021-12-15 08:39:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 427 transitions. [2021-12-15 08:39:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 08:39:42,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:42,098 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:42,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:42,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-15 08:39:42,311 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1701767808, now seen corresponding path program 6 times [2021-12-15 08:39:42,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:42,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003159356] [2021-12-15 08:39:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:42,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:42,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:42,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003159356] [2021-12-15 08:39:42,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003159356] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:42,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151938725] [2021-12-15 08:39:42,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:39:42,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:42,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:42,510 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:42,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 08:39:42,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 08:39:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:42,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 08:39:42,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:42,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:42,751 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:42,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:42,792 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 08:39:42,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:39:43,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 08:39:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:43,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:43,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-15 08:39:43,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2021-12-15 08:39:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:43,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151938725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:43,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:43,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2021-12-15 08:39:43,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719931026] [2021-12-15 08:39:43,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:43,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 08:39:43,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 08:39:43,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 08:39:43,530 INFO L87 Difference]: Start difference. First operand 369 states and 427 transitions. Second operand has 38 states, 38 states have (on average 4.026315789473684) internal successors, (153), 38 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:47,801 INFO L93 Difference]: Finished difference Result 865 states and 976 transitions. [2021-12-15 08:39:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-15 08:39:47,802 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.026315789473684) internal successors, (153), 38 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 08:39:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:47,804 INFO L225 Difference]: With dead ends: 865 [2021-12-15 08:39:47,804 INFO L226 Difference]: Without dead ends: 855 [2021-12-15 08:39:47,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 89 SyntacticMatches, 25 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7825 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2254, Invalid=16652, Unknown=0, NotChecked=0, Total=18906 [2021-12-15 08:39:47,809 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 492 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:47,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 649 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 2621 Invalid, 0 Unknown, 110 Unchecked, 1.3s Time] [2021-12-15 08:39:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-15 08:39:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 419. [2021-12-15 08:39:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.1531100478468899) internal successors, (482), 418 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 482 transitions. [2021-12-15 08:39:47,841 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 482 transitions. Word has length 55 [2021-12-15 08:39:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:47,841 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 482 transitions. [2021-12-15 08:39:47,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.026315789473684) internal successors, (153), 38 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 482 transitions. [2021-12-15 08:39:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 08:39:47,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:47,843 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:47,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:48,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 08:39:48,060 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash -607563004, now seen corresponding path program 1 times [2021-12-15 08:39:48,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087753846] [2021-12-15 08:39:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:48,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 08:39:48,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087753846] [2021-12-15 08:39:48,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087753846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:48,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:48,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:39:48,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785207386] [2021-12-15 08:39:48,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:48,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:39:48,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:39:48,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:48,105 INFO L87 Difference]: Start difference. First operand 419 states and 482 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:48,136 INFO L93 Difference]: Finished difference Result 613 states and 704 transitions. [2021-12-15 08:39:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:39:48,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 08:39:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:48,137 INFO L225 Difference]: With dead ends: 613 [2021-12-15 08:39:48,137 INFO L226 Difference]: Without dead ends: 345 [2021-12-15 08:39:48,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:48,138 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:48,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 43 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-15 08:39:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 271. [2021-12-15 08:39:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.114814814814815) internal successors, (301), 270 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 301 transitions. [2021-12-15 08:39:48,163 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 301 transitions. Word has length 55 [2021-12-15 08:39:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:48,163 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 301 transitions. [2021-12-15 08:39:48,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 301 transitions. [2021-12-15 08:39:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 08:39:48,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:48,164 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:48,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 08:39:48,164 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1112564476, now seen corresponding path program 2 times [2021-12-15 08:39:48,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372984440] [2021-12-15 08:39:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:48,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:48,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372984440] [2021-12-15 08:39:48,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372984440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680163762] [2021-12-15 08:39:48,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:39:48,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:48,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:48,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:48,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 08:39:48,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:39:48,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:48,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 08:39:48,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:48,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:48,440 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:48,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:48,455 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:48,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:48,682 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-15 08:39:48,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-15 08:39:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:48,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:48,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:48,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:48,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680163762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:48,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:48,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2021-12-15 08:39:48,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275638430] [2021-12-15 08:39:48,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:48,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 08:39:48,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 08:39:48,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:39:48,865 INFO L87 Difference]: Start difference. First operand 271 states and 301 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:51,038 INFO L93 Difference]: Finished difference Result 733 states and 809 transitions. [2021-12-15 08:39:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-15 08:39:51,039 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 08:39:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:51,040 INFO L225 Difference]: With dead ends: 733 [2021-12-15 08:39:51,040 INFO L226 Difference]: Without dead ends: 731 [2021-12-15 08:39:51,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 97 SyntacticMatches, 9 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6989 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1550, Invalid=16272, Unknown=0, NotChecked=0, Total=17822 [2021-12-15 08:39:51,044 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 357 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 2092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:51,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 354 Invalid, 2092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 08:39:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-15 08:39:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 277. [2021-12-15 08:39:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.1159420289855073) internal successors, (308), 276 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 308 transitions. [2021-12-15 08:39:51,077 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 308 transitions. Word has length 55 [2021-12-15 08:39:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:51,077 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 308 transitions. [2021-12-15 08:39:51,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 308 transitions. [2021-12-15 08:39:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:39:51,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:51,078 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:51,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-15 08:39:51,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:51,299 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1260464045, now seen corresponding path program 7 times [2021-12-15 08:39:51,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:51,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667204788] [2021-12-15 08:39:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:51,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:51,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:51,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667204788] [2021-12-15 08:39:51,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667204788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408593628] [2021-12-15 08:39:51,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:39:51,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:51,461 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) [2021-12-15 08:39:51,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 08:39:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:51,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 08:39:51,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:51,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:51,597 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:51,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:51,878 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-15 08:39:51,879 INFO L388 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 24 treesize of output 10 [2021-12-15 08:39:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:51,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:51,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 08:39:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408593628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:52,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:52,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2021-12-15 08:39:52,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571118361] [2021-12-15 08:39:52,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:52,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 08:39:52,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:52,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 08:39:52,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-12-15 08:39:52,055 INFO L87 Difference]: Start difference. First operand 277 states and 308 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:53,762 INFO L93 Difference]: Finished difference Result 635 states and 682 transitions. [2021-12-15 08:39:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-15 08:39:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 08:39:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:53,765 INFO L225 Difference]: With dead ends: 635 [2021-12-15 08:39:53,765 INFO L226 Difference]: Without dead ends: 625 [2021-12-15 08:39:53,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=810, Invalid=7022, Unknown=0, NotChecked=0, Total=7832 [2021-12-15 08:39:53,766 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 223 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:53,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 460 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 08:39:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-15 08:39:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 289. [2021-12-15 08:39:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.1111111111111112) internal successors, (320), 288 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 320 transitions. [2021-12-15 08:39:53,790 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 320 transitions. Word has length 61 [2021-12-15 08:39:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:53,791 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 320 transitions. [2021-12-15 08:39:53,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 320 transitions. [2021-12-15 08:39:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:39:53,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:53,792 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:53,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:54,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:54,015 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2088818609, now seen corresponding path program 3 times [2021-12-15 08:39:54,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072240318] [2021-12-15 08:39:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:54,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:54,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:54,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072240318] [2021-12-15 08:39:54,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072240318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:54,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828733232] [2021-12-15 08:39:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:39:54,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:54,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:54,157 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) [2021-12-15 08:39:54,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 08:39:54,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 08:39:54,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 08:39:54,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:54,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:54,384 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:54,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:55,064 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-12-15 08:39:55,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 23 [2021-12-15 08:39:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:55,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:55,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:55,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:55,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828733232] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:55,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:55,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 25 [2021-12-15 08:39:55,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137993802] [2021-12-15 08:39:55,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:55,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 08:39:55,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 08:39:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:39:55,235 INFO L87 Difference]: Start difference. First operand 289 states and 320 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:56,205 INFO L93 Difference]: Finished difference Result 727 states and 801 transitions. [2021-12-15 08:39:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-15 08:39:56,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 08:39:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:56,208 INFO L225 Difference]: With dead ends: 727 [2021-12-15 08:39:56,208 INFO L226 Difference]: Without dead ends: 725 [2021-12-15 08:39:56,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=625, Invalid=6181, Unknown=0, NotChecked=0, Total=6806 [2021-12-15 08:39:56,214 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:56,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 365 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 811 Invalid, 0 Unknown, 375 Unchecked, 0.3s Time] [2021-12-15 08:39:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-15 08:39:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 535. [2021-12-15 08:39:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.1104868913857677) internal successors, (593), 534 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 593 transitions. [2021-12-15 08:39:56,257 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 593 transitions. Word has length 61 [2021-12-15 08:39:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:56,257 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 593 transitions. [2021-12-15 08:39:56,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 593 transitions. [2021-12-15 08:39:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:39:56,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:56,259 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:56,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-15 08:39:56,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-15 08:39:56,467 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1696675597, now seen corresponding path program 4 times [2021-12-15 08:39:56,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:56,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695721691] [2021-12-15 08:39:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:56,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:56,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695721691] [2021-12-15 08:39:56,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695721691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146344966] [2021-12-15 08:39:56,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:39:56,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:56,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:56,612 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:56,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 08:39:56,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:39:56,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:56,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 08:39:56,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:56,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:56,731 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:57,001 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-15 08:39:57,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-15 08:39:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:57,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:57,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:39:57,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:39:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:57,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146344966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:57,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:57,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2021-12-15 08:39:57,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871878720] [2021-12-15 08:39:57,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:57,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 08:39:57,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 08:39:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-12-15 08:39:57,184 INFO L87 Difference]: Start difference. First operand 535 states and 593 transitions. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:40:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:01,418 INFO L93 Difference]: Finished difference Result 1376 states and 1513 transitions. [2021-12-15 08:40:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2021-12-15 08:40:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 08:40:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:01,421 INFO L225 Difference]: With dead ends: 1376 [2021-12-15 08:40:01,421 INFO L226 Difference]: Without dead ends: 1374 [2021-12-15 08:40:01,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23504 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3494, Invalid=51028, Unknown=0, NotChecked=0, Total=54522 [2021-12-15 08:40:01,425 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 489 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 2858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:01,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 566 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 2858 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 08:40:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-12-15 08:40:01,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 430. [2021-12-15 08:40:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.1072261072261071) internal successors, (475), 429 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:40:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 475 transitions. [2021-12-15 08:40:01,461 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 475 transitions. Word has length 61 [2021-12-15 08:40:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:01,461 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 475 transitions. [2021-12-15 08:40:01,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:40:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 475 transitions. [2021-12-15 08:40:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 08:40:01,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:01,462 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:01,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 08:40:01,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-15 08:40:01,684 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:01,685 INFO L85 PathProgramCache]: Analyzing trace with hash 873853158, now seen corresponding path program 8 times [2021-12-15 08:40:01,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:01,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100078960] [2021-12-15 08:40:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:01,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:01,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:01,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100078960] [2021-12-15 08:40:01,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100078960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:40:01,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844497340] [2021-12-15 08:40:01,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:40:01,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:01,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:40:01,843 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:40:01,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 08:40:01,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:40:01,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:40:01,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 08:40:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:40:02,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:40:02,358 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-15 08:40:02,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-15 08:40:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:02,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:40:02,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:40:02,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 08:40:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:02,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844497340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:40:02,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:40:02,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2021-12-15 08:40:02,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991685436] [2021-12-15 08:40:02,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:40:02,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 08:40:02,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:40:02,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 08:40:02,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-15 08:40:02,540 INFO L87 Difference]: Start difference. First operand 430 states and 475 transitions. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:40:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:08,438 INFO L93 Difference]: Finished difference Result 1346 states and 1475 transitions. [2021-12-15 08:40:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2021-12-15 08:40:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 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 67 [2021-12-15 08:40:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:08,441 INFO L225 Difference]: With dead ends: 1346 [2021-12-15 08:40:08,441 INFO L226 Difference]: Without dead ends: 1344 [2021-12-15 08:40:08,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33021 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4692, Invalid=70658, Unknown=0, NotChecked=0, Total=75350 [2021-12-15 08:40:08,446 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 478 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 5148 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 5542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 5148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:08,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 945 Invalid, 5542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 5148 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:40:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-12-15 08:40:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 337. [2021-12-15 08:40:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.1041666666666667) internal successors, (371), 336 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:40:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 371 transitions. [2021-12-15 08:40:08,481 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 371 transitions. Word has length 67 [2021-12-15 08:40:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:08,481 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 371 transitions. [2021-12-15 08:40:08,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:40:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 371 transitions. [2021-12-15 08:40:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 08:40:08,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:08,482 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:08,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 08:40:08,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-15 08:40:08,704 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2143972188, now seen corresponding path program 2 times [2021-12-15 08:40:08,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:08,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055388189] [2021-12-15 08:40:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:08,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:08,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055388189] [2021-12-15 08:40:08,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055388189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:40:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491449081] [2021-12-15 08:40:08,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:40:08,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:40:08,926 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:40:08,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 08:40:09,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:40:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:40:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 08:40:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:40:09,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:40:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:09,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:40:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 08:40:09,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 08:40:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:10,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491449081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:40:10,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:40:10,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 40 [2021-12-15 08:40:10,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275416704] [2021-12-15 08:40:10,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:40:10,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-15 08:40:10,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:40:10,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-15 08:40:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 08:40:10,002 INFO L87 Difference]: Start difference. First operand 337 states and 371 transitions. Second operand has 40 states, 40 states have (on average 4.3) internal successors, (172), 40 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)