./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 c3fed411 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-tmp.no-commuhash-c3fed41 [2021-12-16 22:59:41,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:59:41,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:59:41,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:59:41,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:59:41,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:59:41,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:59:41,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:59:41,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:59:41,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:59:41,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:59:41,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:59:41,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:59:41,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:59:41,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:59:41,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:59:41,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:59:41,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:59:41,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:59:41,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:59:41,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:59:41,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:59:41,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:59:41,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:59:41,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:59:41,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:59:41,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:59:41,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:59:41,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:59:41,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:59:41,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:59:41,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:59:41,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:59:41,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:59:41,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:59:41,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:59:41,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:59:41,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:59:41,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:59:41,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:59:41,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:59:41,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:59:41,196 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:59:41,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:59:41,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:59:41,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:59:41,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:59:41,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:59:41,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:59:41,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:59:41,202 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:59:41,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:59:41,203 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:59:41,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:59:41,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:59:41,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:59:41,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:59:41,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:59:41,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:59:41,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:59:41,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:59:41,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:59:41,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:59:41,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:59:41,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:59:41,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:59:41,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:59:41,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:59:41,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:59:41,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:59:41,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:59:41,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:59:41,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:59:41,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:59:41,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:59:41,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:59:41,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f [2021-12-16 22:59:41,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:59:41,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:59:41,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:59:41,453 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:59:41,453 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:59:41,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr4.c [2021-12-16 22:59:41,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99febfad7/d5660e48a82e47ae88163d386a7ddf39/FLAG95ba8b180 [2021-12-16 22:59:41,877 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:59:41,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr4.c [2021-12-16 22:59:41,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99febfad7/d5660e48a82e47ae88163d386a7ddf39/FLAG95ba8b180 [2021-12-16 22:59:41,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99febfad7/d5660e48a82e47ae88163d386a7ddf39 [2021-12-16 22:59:41,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:59:41,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:59:41,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:59:41,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:59:41,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:59:41,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:59:41" (1/1) ... [2021-12-16 22:59:41,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbea9f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:41, skipping insertion in model container [2021-12-16 22:59:41,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:59:41" (1/1) ... [2021-12-16 22:59:41,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:59:41,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:59:42,039 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] [2021-12-16 22:59:42,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:59:42,064 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:59:42,074 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] [2021-12-16 22:59:42,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:59:42,097 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:59:42,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42 WrapperNode [2021-12-16 22:59:42,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:59:42,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:59:42,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:59:42,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:59:42,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,133 INFO L137 Inliner]: procedures = 15, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2021-12-16 22:59:42,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:59:42,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:59:42,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:59:42,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:59:42,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:59:42,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:59:42,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:59:42,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:59:42,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (1/1) ... [2021-12-16 22:59:42,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:59:42,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:42,187 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) [2021-12-16 22:59:42,188 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 [2021-12-16 22:59:42,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:59:42,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:59:42,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:59:42,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:59:42,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:59:42,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:59:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:59:42,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:59:42,271 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:59:42,272 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:59:42,402 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:59:42,407 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:59:42,407 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 22:59:42,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:59:42 BoogieIcfgContainer [2021-12-16 22:59:42,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:59:42,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:59:42,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:59:42,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:59:42,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:59:41" (1/3) ... [2021-12-16 22:59:42,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8563236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:59:42, skipping insertion in model container [2021-12-16 22:59:42,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:42" (2/3) ... [2021-12-16 22:59:42,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8563236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:59:42, skipping insertion in model container [2021-12-16 22:59:42,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:59:42" (3/3) ... [2021-12-16 22:59:42,416 INFO L111 eAbstractionObserver]: Analyzing ICFG pr4.c [2021-12-16 22:59:42,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:59:42,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:59:42,482 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:59:42,489 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 [2021-12-16 22:59:42,490 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:59:42,500 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) [2021-12-16 22:59:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 22:59:42,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:42,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:42,509 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:42,514 INFO L85 PathProgramCache]: Analyzing trace with hash -260661418, now seen corresponding path program 1 times [2021-12-16 22:59:42,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:42,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370692467] [2021-12-16 22:59:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:42,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:42,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370692467] [2021-12-16 22:59:42,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370692467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:42,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:42,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 22:59:42,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967994935] [2021-12-16 22:59:42,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:42,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:59:42,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:42,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:59:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:59:42,686 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) [2021-12-16 22:59:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:42,698 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2021-12-16 22:59:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:59:42,700 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 [2021-12-16 22:59:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:42,706 INFO L225 Difference]: With dead ends: 47 [2021-12-16 22:59:42,706 INFO L226 Difference]: Without dead ends: 21 [2021-12-16 22:59:42,709 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 [2021-12-16 22:59:42,715 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 [2021-12-16 22:59:42,716 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] [2021-12-16 22:59:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-16 22:59:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-16 22:59:42,739 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) [2021-12-16 22:59:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-12-16 22:59:42,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2021-12-16 22:59:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:42,741 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-12-16 22:59:42,741 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) [2021-12-16 22:59:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-12-16 22:59:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 22:59:42,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:42,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:42,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:59:42,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:42,744 INFO L85 PathProgramCache]: Analyzing trace with hash 451593979, now seen corresponding path program 1 times [2021-12-16 22:59:42,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:42,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386007519] [2021-12-16 22:59:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:42,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:42,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386007519] [2021-12-16 22:59:42,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386007519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:42,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:42,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:59:42,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796396544] [2021-12-16 22:59:42,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:42,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:59:42,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:59:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:59:42,823 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) [2021-12-16 22:59:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:42,858 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-12-16 22:59:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:59:42,859 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 [2021-12-16 22:59:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:42,860 INFO L225 Difference]: With dead ends: 30 [2021-12-16 22:59:42,860 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 22:59:42,861 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 [2021-12-16 22:59:42,862 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 [2021-12-16 22:59:42,864 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] [2021-12-16 22:59:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 22:59:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-16 22:59:42,870 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) [2021-12-16 22:59:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-12-16 22:59:42,872 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2021-12-16 22:59:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:42,873 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-12-16 22:59:42,874 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) [2021-12-16 22:59:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-12-16 22:59:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 22:59:42,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:42,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:42,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 22:59:42,879 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:42,880 INFO L85 PathProgramCache]: Analyzing trace with hash 451653561, now seen corresponding path program 1 times [2021-12-16 22:59:42,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:42,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83447209] [2021-12-16 22:59:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:42,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:43,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:43,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83447209] [2021-12-16 22:59:43,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83447209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:43,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:43,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 22:59:43,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699961060] [2021-12-16 22:59:43,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:43,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 22:59:43,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:43,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 22:59:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:59:43,113 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) [2021-12-16 22:59:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:43,186 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-12-16 22:59:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:59:43,187 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 [2021-12-16 22:59:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:43,188 INFO L225 Difference]: With dead ends: 40 [2021-12-16 22:59:43,189 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 22:59:43,190 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 [2021-12-16 22:59:43,191 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:43,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:59:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 22:59:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-16 22:59:43,197 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) [2021-12-16 22:59:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-16 22:59:43,201 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 13 [2021-12-16 22:59:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:43,201 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-16 22:59:43,202 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) [2021-12-16 22:59:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-16 22:59:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 22:59:43,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:43,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:43,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 22:59:43,203 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1654662766, now seen corresponding path program 1 times [2021-12-16 22:59:43,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:43,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564984415] [2021-12-16 22:59:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:43,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:43,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564984415] [2021-12-16 22:59:43,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564984415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:43,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233972925] [2021-12-16 22:59:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:43,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:43,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:43,583 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) [2021-12-16 22:59:43,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:59:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 22:59:43,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:43,772 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 [2021-12-16 22:59:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,809 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 [2021-12-16 22:59:43,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,830 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 [2021-12-16 22:59:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,848 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 [2021-12-16 22:59:43,913 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 [2021-12-16 22:59:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:43,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:44,073 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 [2021-12-16 22:59:44,077 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 [2021-12-16 22:59:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:44,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233972925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:44,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:44,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2021-12-16 22:59:44,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586969468] [2021-12-16 22:59:44,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:44,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:59:44,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:59:44,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:59:44,112 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) [2021-12-16 22:59:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:44,741 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-12-16 22:59:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 22:59:44,742 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 [2021-12-16 22:59:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:44,744 INFO L225 Difference]: With dead ends: 120 [2021-12-16 22:59:44,744 INFO L226 Difference]: Without dead ends: 110 [2021-12-16 22:59:44,745 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 [2021-12-16 22:59:44,746 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:44,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 131 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:59:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-16 22:59:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 33. [2021-12-16 22:59:44,752 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) [2021-12-16 22:59:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-12-16 22:59:44,753 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 19 [2021-12-16 22:59:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:44,753 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-12-16 22:59:44,753 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) [2021-12-16 22:59:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-12-16 22:59:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 22:59:44,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:44,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:44,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 22:59:44,980 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 [2021-12-16 22:59:44,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1912828204, now seen corresponding path program 1 times [2021-12-16 22:59:44,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:44,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326183546] [2021-12-16 22:59:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:44,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:45,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:45,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326183546] [2021-12-16 22:59:45,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326183546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:45,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:45,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:59:45,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209274209] [2021-12-16 22:59:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:45,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:59:45,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:59:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:59:45,032 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) [2021-12-16 22:59:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:45,062 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-12-16 22:59:45,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 22:59:45,062 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 [2021-12-16 22:59:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:45,065 INFO L225 Difference]: With dead ends: 60 [2021-12-16 22:59:45,066 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 22:59:45,066 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 [2021-12-16 22:59:45,067 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 [2021-12-16 22:59:45,067 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] [2021-12-16 22:59:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 22:59:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-16 22:59:45,077 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) [2021-12-16 22:59:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-16 22:59:45,079 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 19 [2021-12-16 22:59:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:45,079 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-16 22:59:45,079 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) [2021-12-16 22:59:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-16 22:59:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 22:59:45,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:45,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:45,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 22:59:45,081 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1519801194, now seen corresponding path program 1 times [2021-12-16 22:59:45,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:45,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691248745] [2021-12-16 22:59:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:45,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:45,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:45,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691248745] [2021-12-16 22:59:45,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691248745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:45,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106548221] [2021-12-16 22:59:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:45,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:45,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:45,260 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) [2021-12-16 22:59:45,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:59:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:59:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:45,345 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 [2021-12-16 22:59:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:45,360 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 [2021-12-16 22:59:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:45,374 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 [2021-12-16 22:59:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:45,393 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 [2021-12-16 22:59:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:45,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:45,541 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 [2021-12-16 22:59:45,551 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 [2021-12-16 22:59:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:45,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106548221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:45,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:45,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2021-12-16 22:59:45,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208813491] [2021-12-16 22:59:45,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:45,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:59:45,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:59:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:59:45,571 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) [2021-12-16 22:59:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:45,907 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2021-12-16 22:59:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:59:45,908 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 [2021-12-16 22:59:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:45,909 INFO L225 Difference]: With dead ends: 103 [2021-12-16 22:59:45,909 INFO L226 Difference]: Without dead ends: 101 [2021-12-16 22:59:45,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:59:45,911 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-16 22:59:45,911 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] [2021-12-16 22:59:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-16 22:59:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 43. [2021-12-16 22:59:45,917 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) [2021-12-16 22:59:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-12-16 22:59:45,918 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 19 [2021-12-16 22:59:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:45,918 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-12-16 22:59:45,918 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) [2021-12-16 22:59:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-12-16 22:59:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 22:59:45,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:45,919 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] [2021-12-16 22:59:45,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:46,139 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 [2021-12-16 22:59:46,140 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2022900031, now seen corresponding path program 1 times [2021-12-16 22:59:46,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:46,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447253196] [2021-12-16 22:59:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:46,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:46,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447253196] [2021-12-16 22:59:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447253196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100316866] [2021-12-16 22:59:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:46,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:46,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:46,321 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) [2021-12-16 22:59:46,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:59:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:46,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:59:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:46,470 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 [2021-12-16 22:59:46,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:46,500 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 [2021-12-16 22:59:46,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:46,521 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 [2021-12-16 22:59:46,645 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 [2021-12-16 22:59:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:46,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:46,832 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 [2021-12-16 22:59:46,834 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 [2021-12-16 22:59:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:46,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100316866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:46,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:46,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-16 22:59:46,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703023748] [2021-12-16 22:59:46,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:46,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:59:46,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:59:46,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:59:46,924 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) [2021-12-16 22:59:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:48,047 INFO L93 Difference]: Finished difference Result 189 states and 243 transitions. [2021-12-16 22:59:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 22:59:48,049 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 [2021-12-16 22:59:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:48,050 INFO L225 Difference]: With dead ends: 189 [2021-12-16 22:59:48,050 INFO L226 Difference]: Without dead ends: 163 [2021-12-16 22:59:48,051 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 [2021-12-16 22:59:48,052 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:48,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 177 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 22:59:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-16 22:59:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 62. [2021-12-16 22:59:48,058 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) [2021-12-16 22:59:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-12-16 22:59:48,059 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 25 [2021-12-16 22:59:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:48,060 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-12-16 22:59:48,060 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) [2021-12-16 22:59:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-12-16 22:59:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 22:59:48,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:48,061 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] [2021-12-16 22:59:48,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:48,271 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 [2021-12-16 22:59:48,272 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:48,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1855836577, now seen corresponding path program 1 times [2021-12-16 22:59:48,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:48,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336722447] [2021-12-16 22:59:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:48,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:48,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336722447] [2021-12-16 22:59:48,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336722447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:48,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:48,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:59:48,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501345734] [2021-12-16 22:59:48,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:48,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:59:48,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:59:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:48,305 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) [2021-12-16 22:59:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:48,320 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2021-12-16 22:59:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:59:48,320 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 [2021-12-16 22:59:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:48,321 INFO L225 Difference]: With dead ends: 94 [2021-12-16 22:59:48,321 INFO L226 Difference]: Without dead ends: 67 [2021-12-16 22:59:48,322 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 [2021-12-16 22:59:48,322 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 [2021-12-16 22:59:48,322 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] [2021-12-16 22:59:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-16 22:59:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-12-16 22:59:48,327 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) [2021-12-16 22:59:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-16 22:59:48,327 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 25 [2021-12-16 22:59:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:48,328 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-16 22:59:48,328 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) [2021-12-16 22:59:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-16 22:59:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 22:59:48,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:48,329 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] [2021-12-16 22:59:48,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 22:59:48,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1963473599, now seen corresponding path program 1 times [2021-12-16 22:59:48,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:48,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266802721] [2021-12-16 22:59:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:48,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:48,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266802721] [2021-12-16 22:59:48,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266802721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766690625] [2021-12-16 22:59:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:48,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:48,446 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) [2021-12-16 22:59:48,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:59:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 22:59:48,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:48,534 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 [2021-12-16 22:59:48,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:48,545 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 [2021-12-16 22:59:48,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:48,557 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 [2021-12-16 22:59:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:48,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:48,737 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 [2021-12-16 22:59:48,739 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 [2021-12-16 22:59:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:48,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766690625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:48,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:48,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 15 [2021-12-16 22:59:48,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82218320] [2021-12-16 22:59:48,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:48,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 22:59:48,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:48,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 22:59:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 22:59:48,759 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) [2021-12-16 22:59:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:49,159 INFO L93 Difference]: Finished difference Result 144 states and 179 transitions. [2021-12-16 22:59:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 22:59:49,159 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 [2021-12-16 22:59:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:49,160 INFO L225 Difference]: With dead ends: 144 [2021-12-16 22:59:49,160 INFO L226 Difference]: Without dead ends: 142 [2021-12-16 22:59:49,161 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 [2021-12-16 22:59:49,162 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 [2021-12-16 22:59:49,162 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] [2021-12-16 22:59:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-16 22:59:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 65. [2021-12-16 22:59:49,173 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) [2021-12-16 22:59:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2021-12-16 22:59:49,175 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 25 [2021-12-16 22:59:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:49,177 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2021-12-16 22:59:49,177 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) [2021-12-16 22:59:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2021-12-16 22:59:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 22:59:49,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:49,179 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] [2021-12-16 22:59:49,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:49,380 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 [2021-12-16 22:59:49,380 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:49,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1272777940, now seen corresponding path program 2 times [2021-12-16 22:59:49,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:49,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078960571] [2021-12-16 22:59:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:49,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:49,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:49,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078960571] [2021-12-16 22:59:49,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078960571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:49,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433527816] [2021-12-16 22:59:49,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:59:49,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:49,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:49,484 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) [2021-12-16 22:59:49,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:59:49,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:59:49,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:49,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 22:59:49,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:49,556 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 [2021-12-16 22:59:49,571 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:59:49,571 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 [2021-12-16 22:59:49,664 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 [2021-12-16 22:59:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:49,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:49,737 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 [2021-12-16 22:59:49,738 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 [2021-12-16 22:59:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:49,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433527816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:49,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:49,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2021-12-16 22:59:49,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702698330] [2021-12-16 22:59:49,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:49,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 22:59:49,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 22:59:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 22:59:49,754 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) [2021-12-16 22:59:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:50,143 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-12-16 22:59:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 22:59:50,144 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 [2021-12-16 22:59:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:50,144 INFO L225 Difference]: With dead ends: 196 [2021-12-16 22:59:50,145 INFO L226 Difference]: Without dead ends: 186 [2021-12-16 22:59:50,145 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 [2021-12-16 22:59:50,146 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:50,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 107 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:59:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-16 22:59:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 86. [2021-12-16 22:59:50,153 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) [2021-12-16 22:59:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2021-12-16 22:59:50,154 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 31 [2021-12-16 22:59:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:50,154 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2021-12-16 22:59:50,154 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) [2021-12-16 22:59:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2021-12-16 22:59:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 22:59:50,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:50,155 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] [2021-12-16 22:59:50,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 22:59:50,371 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 [2021-12-16 22:59:50,372 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1491632658, now seen corresponding path program 1 times [2021-12-16 22:59:50,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:50,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688944989] [2021-12-16 22:59:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:50,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:50,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:50,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688944989] [2021-12-16 22:59:50,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688944989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:50,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571828341] [2021-12-16 22:59:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:50,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:50,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:50,455 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) [2021-12-16 22:59:50,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:59:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 22:59:50,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:50,532 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 [2021-12-16 22:59:50,555 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:59:50,556 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 [2021-12-16 22:59:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:50,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:50,726 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 [2021-12-16 22:59:50,728 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 [2021-12-16 22:59:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:50,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571828341] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:50,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:50,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2021-12-16 22:59:50,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556687403] [2021-12-16 22:59:50,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:50,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 22:59:50,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:50,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 22:59:50,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:59:50,744 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) [2021-12-16 22:59:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:51,347 INFO L93 Difference]: Finished difference Result 313 states and 403 transitions. [2021-12-16 22:59:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-16 22:59:51,348 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 [2021-12-16 22:59:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:51,349 INFO L225 Difference]: With dead ends: 313 [2021-12-16 22:59:51,349 INFO L226 Difference]: Without dead ends: 311 [2021-12-16 22:59:51,350 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 [2021-12-16 22:59:51,351 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 [2021-12-16 22:59:51,351 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] [2021-12-16 22:59:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-16 22:59:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 123. [2021-12-16 22:59:51,360 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) [2021-12-16 22:59:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2021-12-16 22:59:51,361 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 31 [2021-12-16 22:59:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:51,362 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2021-12-16 22:59:51,362 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) [2021-12-16 22:59:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2021-12-16 22:59:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 22:59:51,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:51,363 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] [2021-12-16 22:59:51,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:51,579 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 [2021-12-16 22:59:51,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash -613557008, now seen corresponding path program 1 times [2021-12-16 22:59:51,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:51,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959210055] [2021-12-16 22:59:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:51,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 22:59:51,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:51,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959210055] [2021-12-16 22:59:51,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959210055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:51,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:51,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:59:51,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732971401] [2021-12-16 22:59:51,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:51,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:59:51,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:59:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:51,606 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) [2021-12-16 22:59:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:51,624 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2021-12-16 22:59:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:59:51,625 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 [2021-12-16 22:59:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:51,625 INFO L225 Difference]: With dead ends: 172 [2021-12-16 22:59:51,625 INFO L226 Difference]: Without dead ends: 139 [2021-12-16 22:59:51,626 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 [2021-12-16 22:59:51,626 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 [2021-12-16 22:59:51,627 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] [2021-12-16 22:59:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-16 22:59:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 123. [2021-12-16 22:59:51,634 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) [2021-12-16 22:59:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2021-12-16 22:59:51,635 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 31 [2021-12-16 22:59:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:51,635 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2021-12-16 22:59:51,635 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) [2021-12-16 22:59:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2021-12-16 22:59:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 22:59:51,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:51,636 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] [2021-12-16 22:59:51,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 22:59:51,636 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash -830647440, now seen corresponding path program 2 times [2021-12-16 22:59:51,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:51,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479617940] [2021-12-16 22:59:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:51,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 22:59:51,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:51,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479617940] [2021-12-16 22:59:51,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479617940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:51,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:51,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:59:51,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257252931] [2021-12-16 22:59:51,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:51,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:59:51,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:51,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:59:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:51,659 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) [2021-12-16 22:59:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:51,677 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2021-12-16 22:59:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:59:51,677 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 [2021-12-16 22:59:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:51,678 INFO L225 Difference]: With dead ends: 155 [2021-12-16 22:59:51,678 INFO L226 Difference]: Without dead ends: 122 [2021-12-16 22:59:51,678 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 [2021-12-16 22:59:51,679 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 [2021-12-16 22:59:51,679 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] [2021-12-16 22:59:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-16 22:59:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2021-12-16 22:59:51,693 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) [2021-12-16 22:59:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2021-12-16 22:59:51,694 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 31 [2021-12-16 22:59:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:51,694 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2021-12-16 22:59:51,694 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) [2021-12-16 22:59:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2021-12-16 22:59:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 22:59:51,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:51,695 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] [2021-12-16 22:59:51,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 22:59:51,695 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2136932185, now seen corresponding path program 3 times [2021-12-16 22:59:51,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671923449] [2021-12-16 22:59:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:51,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:51,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:51,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671923449] [2021-12-16 22:59:51,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671923449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:51,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393119329] [2021-12-16 22:59:51,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:59:51,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:51,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:51,841 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) [2021-12-16 22:59:51,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:59:51,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 22:59:51,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:51,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 22:59:51,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:51,932 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 [2021-12-16 22:59:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:52,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:52,193 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 [2021-12-16 22:59:52,195 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 [2021-12-16 22:59:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:52,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393119329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:52,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:52,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2021-12-16 22:59:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613154361] [2021-12-16 22:59:52,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 22:59:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 22:59:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-12-16 22:59:52,215 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) [2021-12-16 22:59:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:53,487 INFO L93 Difference]: Finished difference Result 437 states and 528 transitions. [2021-12-16 22:59:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-16 22:59:53,487 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 [2021-12-16 22:59:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:53,490 INFO L225 Difference]: With dead ends: 437 [2021-12-16 22:59:53,490 INFO L226 Difference]: Without dead ends: 435 [2021-12-16 22:59:53,491 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 [2021-12-16 22:59:53,492 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 [2021-12-16 22:59:53,493 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] [2021-12-16 22:59:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-16 22:59:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 232. [2021-12-16 22:59:53,505 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) [2021-12-16 22:59:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 299 transitions. [2021-12-16 22:59:53,506 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 299 transitions. Word has length 37 [2021-12-16 22:59:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:53,506 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 299 transitions. [2021-12-16 22:59:53,506 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) [2021-12-16 22:59:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 299 transitions. [2021-12-16 22:59:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 22:59:53,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:53,507 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] [2021-12-16 22:59:53,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:53,712 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 [2021-12-16 22:59:53,713 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash 234807077, now seen corresponding path program 1 times [2021-12-16 22:59:53,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:53,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791999888] [2021-12-16 22:59:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:53,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:53,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791999888] [2021-12-16 22:59:53,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791999888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129533084] [2021-12-16 22:59:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:53,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:53,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:53,913 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) [2021-12-16 22:59:53,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:59:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 22:59:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:53,997 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 [2021-12-16 22:59:54,122 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 [2021-12-16 22:59:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:54,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:54,230 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 [2021-12-16 22:59:54,232 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 [2021-12-16 22:59:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:54,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129533084] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:54,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:54,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-12-16 22:59:54,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033668059] [2021-12-16 22:59:54,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:54,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 22:59:54,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 22:59:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:59:54,258 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) [2021-12-16 22:59:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:55,226 INFO L93 Difference]: Finished difference Result 568 states and 706 transitions. [2021-12-16 22:59:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-16 22:59:55,226 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 [2021-12-16 22:59:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:55,228 INFO L225 Difference]: With dead ends: 568 [2021-12-16 22:59:55,228 INFO L226 Difference]: Without dead ends: 485 [2021-12-16 22:59:55,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=481, Invalid=2275, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 22:59:55,229 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:55,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 242 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 22:59:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-16 22:59:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 313. [2021-12-16 22:59:55,246 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) [2021-12-16 22:59:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 394 transitions. [2021-12-16 22:59:55,247 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 394 transitions. Word has length 37 [2021-12-16 22:59:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:55,247 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 394 transitions. [2021-12-16 22:59:55,248 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) [2021-12-16 22:59:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 394 transitions. [2021-12-16 22:59:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 22:59:55,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:55,249 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] [2021-12-16 22:59:55,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:55,472 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 [2021-12-16 22:59:55,472 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash -81425862, now seen corresponding path program 4 times [2021-12-16 22:59:55,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:55,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900085293] [2021-12-16 22:59:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:55,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:55,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:55,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900085293] [2021-12-16 22:59:55,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900085293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:55,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838399442] [2021-12-16 22:59:55,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:59:55,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:55,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:55,724 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) [2021-12-16 22:59:55,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:59:55,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:59:55,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:55,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 22:59:55,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:56,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:56,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838399442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:56,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:56,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2021-12-16 22:59:56,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524930699] [2021-12-16 22:59:56,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:56,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 22:59:56,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 22:59:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:59:56,405 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) [2021-12-16 22:59:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:56,649 INFO L93 Difference]: Finished difference Result 486 states and 581 transitions. [2021-12-16 22:59:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:59:56,649 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 [2021-12-16 22:59:56,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:56,651 INFO L225 Difference]: With dead ends: 486 [2021-12-16 22:59:56,651 INFO L226 Difference]: Without dead ends: 375 [2021-12-16 22:59:56,652 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 [2021-12-16 22:59:56,652 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 [2021-12-16 22:59:56,653 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] [2021-12-16 22:59:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-16 22:59:56,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 317. [2021-12-16 22:59:56,680 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) [2021-12-16 22:59:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 392 transitions. [2021-12-16 22:59:56,681 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 392 transitions. Word has length 43 [2021-12-16 22:59:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:56,682 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 392 transitions. [2021-12-16 22:59:56,682 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) [2021-12-16 22:59:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 392 transitions. [2021-12-16 22:59:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 22:59:56,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:56,683 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] [2021-12-16 22:59:56,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:56,903 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 [2021-12-16 22:59:56,903 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1283752644, now seen corresponding path program 1 times [2021-12-16 22:59:56,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:56,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080410689] [2021-12-16 22:59:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:56,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 22:59:56,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:56,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080410689] [2021-12-16 22:59:56,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080410689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:56,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:56,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:59:56,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211318896] [2021-12-16 22:59:56,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:56,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:59:56,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:59:56,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:56,929 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) [2021-12-16 22:59:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:56,960 INFO L93 Difference]: Finished difference Result 571 states and 693 transitions. [2021-12-16 22:59:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:59:56,960 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 [2021-12-16 22:59:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:56,962 INFO L225 Difference]: With dead ends: 571 [2021-12-16 22:59:56,962 INFO L226 Difference]: Without dead ends: 389 [2021-12-16 22:59:56,963 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 [2021-12-16 22:59:56,964 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 [2021-12-16 22:59:56,964 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] [2021-12-16 22:59:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-16 22:59:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 323. [2021-12-16 22:59:56,982 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) [2021-12-16 22:59:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 392 transitions. [2021-12-16 22:59:56,983 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 392 transitions. Word has length 43 [2021-12-16 22:59:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:56,983 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 392 transitions. [2021-12-16 22:59:56,983 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) [2021-12-16 22:59:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 392 transitions. [2021-12-16 22:59:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 22:59:56,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:56,984 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] [2021-12-16 22:59:56,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 22:59:56,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 548376636, now seen corresponding path program 2 times [2021-12-16 22:59:56,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:56,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437803405] [2021-12-16 22:59:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:56,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 22:59:57,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:57,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437803405] [2021-12-16 22:59:57,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437803405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:57,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:57,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:59:57,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162684768] [2021-12-16 22:59:57,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:57,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:59:57,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:57,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:59:57,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:57,023 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) [2021-12-16 22:59:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:57,050 INFO L93 Difference]: Finished difference Result 407 states and 482 transitions. [2021-12-16 22:59:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:59:57,051 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 [2021-12-16 22:59:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:57,052 INFO L225 Difference]: With dead ends: 407 [2021-12-16 22:59:57,052 INFO L226 Difference]: Without dead ends: 290 [2021-12-16 22:59:57,052 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 [2021-12-16 22:59:57,053 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 [2021-12-16 22:59:57,053 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] [2021-12-16 22:59:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-16 22:59:57,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 257. [2021-12-16 22:59:57,068 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) [2021-12-16 22:59:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 307 transitions. [2021-12-16 22:59:57,069 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 307 transitions. Word has length 43 [2021-12-16 22:59:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:57,069 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 307 transitions. [2021-12-16 22:59:57,070 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) [2021-12-16 22:59:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 307 transitions. [2021-12-16 22:59:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 22:59:57,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:57,071 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] [2021-12-16 22:59:57,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 22:59:57,071 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash -457370065, now seen corresponding path program 5 times [2021-12-16 22:59:57,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843022144] [2021-12-16 22:59:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:57,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:57,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:57,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843022144] [2021-12-16 22:59:57,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843022144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:57,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261554770] [2021-12-16 22:59:57,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:59:57,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:57,292 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) [2021-12-16 22:59:57,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:59:57,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-16 22:59:57,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:57,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:59:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:57,478 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 [2021-12-16 22:59:57,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:57,540 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 [2021-12-16 22:59:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:57,559 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 [2021-12-16 22:59:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:57,574 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 [2021-12-16 22:59:57,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:57,589 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 [2021-12-16 22:59:57,831 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 15 treesize of output 7 [2021-12-16 22:59:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:59:57,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:00,159 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 [2021-12-16 23:00:00,187 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 [2021-12-16 23:00:00,190 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 [2021-12-16 23:00:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2021-12-16 23:00:00,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261554770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:00,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:00,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 33 [2021-12-16 23:00:00,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538208517] [2021-12-16 23:00:00,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:00,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 23:00:00,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 23:00:00,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=895, Unknown=1, NotChecked=60, Total=1056 [2021-12-16 23:00:00,289 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) [2021-12-16 23:00:02,447 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 [2021-12-16 23:00:04,479 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 [2021-12-16 23:00:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:07,573 INFO L93 Difference]: Finished difference Result 698 states and 794 transitions. [2021-12-16 23:00:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-16 23:00:07,573 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 [2021-12-16 23:00:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:07,576 INFO L225 Difference]: With dead ends: 698 [2021-12-16 23:00:07,576 INFO L226 Difference]: Without dead ends: 688 [2021-12-16 23:00:07,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4045 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1359, Invalid=12222, Unknown=3, NotChecked=696, Total=14280 [2021-12-16 23:00:07,580 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 [2021-12-16 23:00:07,580 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] [2021-12-16 23:00:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-16 23:00:07,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 335. [2021-12-16 23:00:07,619 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) [2021-12-16 23:00:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 389 transitions. [2021-12-16 23:00:07,620 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 389 transitions. Word has length 49 [2021-12-16 23:00:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:07,620 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 389 transitions. [2021-12-16 23:00:07,621 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) [2021-12-16 23:00:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 389 transitions. [2021-12-16 23:00:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 23:00:07,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:07,622 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] [2021-12-16 23:00:07,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-16 23:00:07,827 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 [2021-12-16 23:00:07,827 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash -171220375, now seen corresponding path program 2 times [2021-12-16 23:00:07,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:07,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551408302] [2021-12-16 23:00:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:07,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:07,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:07,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551408302] [2021-12-16 23:00:07,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551408302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:07,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915588296] [2021-12-16 23:00:07,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:00:07,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:07,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:07,965 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) [2021-12-16 23:00:07,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 23:00:08,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:00:08,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:08,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 23:00:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:08,081 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 [2021-12-16 23:00:08,096 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:08,096 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 [2021-12-16 23:00:08,114 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:08,114 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 [2021-12-16 23:00:08,131 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:08,131 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 [2021-12-16 23:00:08,324 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:00:08,325 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 [2021-12-16 23:00:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:08,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:08,427 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 [2021-12-16 23:00:08,430 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 [2021-12-16 23:00:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:08,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915588296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:08,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:08,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 17 [2021-12-16 23:00:08,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981488013] [2021-12-16 23:00:08,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:08,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 23:00:08,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 23:00:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:00:08,495 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) [2021-12-16 23:00:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:09,614 INFO L93 Difference]: Finished difference Result 643 states and 725 transitions. [2021-12-16 23:00:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-16 23:00:09,615 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 [2021-12-16 23:00:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:09,617 INFO L225 Difference]: With dead ends: 643 [2021-12-16 23:00:09,617 INFO L226 Difference]: Without dead ends: 633 [2021-12-16 23:00:09,618 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 [2021-12-16 23:00:09,618 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 [2021-12-16 23:00:09,619 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] [2021-12-16 23:00:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-12-16 23:00:09,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 355. [2021-12-16 23:00:09,643 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) [2021-12-16 23:00:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 411 transitions. [2021-12-16 23:00:09,644 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 411 transitions. Word has length 49 [2021-12-16 23:00:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:09,644 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 411 transitions. [2021-12-16 23:00:09,645 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) [2021-12-16 23:00:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 411 transitions. [2021-12-16 23:00:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 23:00:09,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:09,646 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] [2021-12-16 23:00:09,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:09,855 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 [2021-12-16 23:00:09,855 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash -317440667, now seen corresponding path program 1 times [2021-12-16 23:00:09,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:09,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213074443] [2021-12-16 23:00:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:09,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:09,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213074443] [2021-12-16 23:00:09,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213074443] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105616067] [2021-12-16 23:00:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:09,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:09,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:09,988 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) [2021-12-16 23:00:09,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 23:00:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 23:00:10,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:10,092 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 [2021-12-16 23:00:10,109 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:10,109 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 [2021-12-16 23:00:10,128 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:10,128 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 [2021-12-16 23:00:10,144 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:10,145 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 [2021-12-16 23:00:10,343 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:00:10,343 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 [2021-12-16 23:00:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:10,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:10,477 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 [2021-12-16 23:00:10,479 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 [2021-12-16 23:00:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:10,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105616067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:10,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:10,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2021-12-16 23:00:10,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398264531] [2021-12-16 23:00:10,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:10,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 23:00:10,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:10,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 23:00:10,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-16 23:00:10,504 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) [2021-12-16 23:00:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:11,864 INFO L93 Difference]: Finished difference Result 733 states and 833 transitions. [2021-12-16 23:00:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-16 23:00:11,865 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 [2021-12-16 23:00:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:11,867 INFO L225 Difference]: With dead ends: 733 [2021-12-16 23:00:11,867 INFO L226 Difference]: Without dead ends: 731 [2021-12-16 23:00:11,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=896, Invalid=7476, Unknown=0, NotChecked=0, Total=8372 [2021-12-16 23:00:11,870 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 [2021-12-16 23:00:11,870 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] [2021-12-16 23:00:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-16 23:00:11,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 369. [2021-12-16 23:00:11,896 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) [2021-12-16 23:00:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 427 transitions. [2021-12-16 23:00:11,897 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 427 transitions. Word has length 49 [2021-12-16 23:00:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:11,897 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 427 transitions. [2021-12-16 23:00:11,898 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) [2021-12-16 23:00:11,898 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 427 transitions. [2021-12-16 23:00:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 23:00:11,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:11,899 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] [2021-12-16 23:00:11,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:12,107 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 [2021-12-16 23:00:12,107 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:12,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1701767808, now seen corresponding path program 6 times [2021-12-16 23:00:12,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:12,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086201406] [2021-12-16 23:00:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:12,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:12,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086201406] [2021-12-16 23:00:12,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086201406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445507651] [2021-12-16 23:00:12,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:00:12,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:12,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:12,318 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) [2021-12-16 23:00:12,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 23:00:12,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-16 23:00:12,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 23:00:12,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:12,507 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 [2021-12-16 23:00:12,544 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:12,544 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 [2021-12-16 23:00:12,581 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:00:12,581 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 [2021-12-16 23:00:12,903 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 [2021-12-16 23:00:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:12,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:13,228 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 [2021-12-16 23:00:13,230 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 [2021-12-16 23:00:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:13,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445507651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:13,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:13,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2021-12-16 23:00:13,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657283461] [2021-12-16 23:00:13,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:13,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-16 23:00:13,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:13,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-16 23:00:13,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 23:00:13,375 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) [2021-12-16 23:00:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:17,901 INFO L93 Difference]: Finished difference Result 865 states and 976 transitions. [2021-12-16 23:00:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-16 23:00:17,902 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 [2021-12-16 23:00:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:17,904 INFO L225 Difference]: With dead ends: 865 [2021-12-16 23:00:17,904 INFO L226 Difference]: Without dead ends: 855 [2021-12-16 23:00:17,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 89 SyntacticMatches, 25 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7825 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2254, Invalid=16652, Unknown=0, NotChecked=0, Total=18906 [2021-12-16 23:00:17,909 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 [2021-12-16 23:00:17,909 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] [2021-12-16 23:00:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-16 23:00:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 419. [2021-12-16 23:00:17,952 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) [2021-12-16 23:00:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 482 transitions. [2021-12-16 23:00:17,953 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 482 transitions. Word has length 55 [2021-12-16 23:00:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:17,953 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 482 transitions. [2021-12-16 23:00:17,954 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) [2021-12-16 23:00:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 482 transitions. [2021-12-16 23:00:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 23:00:17,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:17,954 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] [2021-12-16 23:00:17,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:18,155 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 [2021-12-16 23:00:18,155 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash -607563004, now seen corresponding path program 1 times [2021-12-16 23:00:18,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:18,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250494128] [2021-12-16 23:00:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:18,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 23:00:18,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:18,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250494128] [2021-12-16 23:00:18,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250494128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:00:18,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:00:18,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 23:00:18,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206310520] [2021-12-16 23:00:18,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:00:18,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:00:18,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:18,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:00:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:00:18,194 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) [2021-12-16 23:00:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:18,231 INFO L93 Difference]: Finished difference Result 613 states and 704 transitions. [2021-12-16 23:00:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:00:18,231 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 [2021-12-16 23:00:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:18,232 INFO L225 Difference]: With dead ends: 613 [2021-12-16 23:00:18,232 INFO L226 Difference]: Without dead ends: 345 [2021-12-16 23:00:18,233 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 [2021-12-16 23:00:18,234 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 [2021-12-16 23:00:18,234 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] [2021-12-16 23:00:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-16 23:00:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 271. [2021-12-16 23:00:18,255 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) [2021-12-16 23:00:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 301 transitions. [2021-12-16 23:00:18,256 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 301 transitions. Word has length 55 [2021-12-16 23:00:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:18,256 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 301 transitions. [2021-12-16 23:00:18,256 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) [2021-12-16 23:00:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 301 transitions. [2021-12-16 23:00:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 23:00:18,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:18,257 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] [2021-12-16 23:00:18,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 23:00:18,258 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1112564476, now seen corresponding path program 2 times [2021-12-16 23:00:18,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:18,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725271644] [2021-12-16 23:00:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:18,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:18,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:18,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725271644] [2021-12-16 23:00:18,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725271644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:18,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056555729] [2021-12-16 23:00:18,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:00:18,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:18,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:18,416 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) [2021-12-16 23:00:18,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 23:00:18,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:00:18,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 23:00:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:18,520 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 [2021-12-16 23:00:18,533 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:18,533 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 [2021-12-16 23:00:18,558 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:18,558 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 [2021-12-16 23:00:18,798 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:00:18,799 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 [2021-12-16 23:00:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:18,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:18,946 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 [2021-12-16 23:00:18,948 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 [2021-12-16 23:00:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:18,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056555729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:18,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:18,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2021-12-16 23:00:18,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544144742] [2021-12-16 23:00:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:18,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 23:00:18,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:18,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 23:00:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:00:18,973 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) [2021-12-16 23:00:21,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:21,139 INFO L93 Difference]: Finished difference Result 733 states and 809 transitions. [2021-12-16 23:00:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-16 23:00:21,139 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 [2021-12-16 23:00:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:21,141 INFO L225 Difference]: With dead ends: 733 [2021-12-16 23:00:21,141 INFO L226 Difference]: Without dead ends: 731 [2021-12-16 23:00:21,145 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 [2021-12-16 23:00:21,145 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 [2021-12-16 23:00:21,146 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] [2021-12-16 23:00:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-16 23:00:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 277. [2021-12-16 23:00:21,189 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) [2021-12-16 23:00:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 308 transitions. [2021-12-16 23:00:21,190 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 308 transitions. Word has length 55 [2021-12-16 23:00:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:21,190 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 308 transitions. [2021-12-16 23:00:21,190 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) [2021-12-16 23:00:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 308 transitions. [2021-12-16 23:00:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 23:00:21,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:21,191 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] [2021-12-16 23:00:21,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:21,414 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 [2021-12-16 23:00:21,415 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:21,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1260464045, now seen corresponding path program 7 times [2021-12-16 23:00:21,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:21,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908387177] [2021-12-16 23:00:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:21,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:21,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:21,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908387177] [2021-12-16 23:00:21,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908387177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:21,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060855865] [2021-12-16 23:00:21,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:00:21,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:21,571 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) [2021-12-16 23:00:21,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 23:00:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:21,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 23:00:21,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:21,716 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 [2021-12-16 23:00:21,733 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:21,733 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 [2021-12-16 23:00:22,007 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:00:22,007 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 [2021-12-16 23:00:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:22,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:22,127 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 [2021-12-16 23:00:22,129 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 [2021-12-16 23:00:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:22,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060855865] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:22,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:22,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2021-12-16 23:00:22,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766095672] [2021-12-16 23:00:22,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:22,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 23:00:22,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:22,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 23:00:22,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-12-16 23:00:22,183 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) [2021-12-16 23:00:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:23,911 INFO L93 Difference]: Finished difference Result 635 states and 682 transitions. [2021-12-16 23:00:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-16 23:00:23,912 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 [2021-12-16 23:00:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:23,913 INFO L225 Difference]: With dead ends: 635 [2021-12-16 23:00:23,913 INFO L226 Difference]: Without dead ends: 625 [2021-12-16 23:00:23,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=810, Invalid=7022, Unknown=0, NotChecked=0, Total=7832 [2021-12-16 23:00:23,915 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 [2021-12-16 23:00:23,915 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] [2021-12-16 23:00:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-16 23:00:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 289. [2021-12-16 23:00:23,957 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) [2021-12-16 23:00:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 320 transitions. [2021-12-16 23:00:23,958 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 320 transitions. Word has length 61 [2021-12-16 23:00:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:23,958 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 320 transitions. [2021-12-16 23:00:23,959 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) [2021-12-16 23:00:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 320 transitions. [2021-12-16 23:00:23,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 23:00:23,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:23,960 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] [2021-12-16 23:00:23,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:24,167 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 [2021-12-16 23:00:24,167 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:24,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2088818609, now seen corresponding path program 3 times [2021-12-16 23:00:24,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:24,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066159511] [2021-12-16 23:00:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:24,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:24,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:24,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066159511] [2021-12-16 23:00:24,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066159511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:24,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636538256] [2021-12-16 23:00:24,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:00:24,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:24,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:24,322 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) [2021-12-16 23:00:24,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 23:00:24,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-16 23:00:24,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 23:00:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:24,491 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 [2021-12-16 23:00:24,505 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:24,505 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 [2021-12-16 23:00:25,208 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-12-16 23:00:25,208 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 [2021-12-16 23:00:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:25,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:25,343 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 [2021-12-16 23:00:25,350 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 [2021-12-16 23:00:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:25,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636538256] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:25,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:25,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 25 [2021-12-16 23:00:25,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540526118] [2021-12-16 23:00:25,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:25,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 23:00:25,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:25,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 23:00:25,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-12-16 23:00:25,380 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) [2021-12-16 23:00:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:26,370 INFO L93 Difference]: Finished difference Result 727 states and 801 transitions. [2021-12-16 23:00:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-16 23:00:26,370 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 [2021-12-16 23:00:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:26,372 INFO L225 Difference]: With dead ends: 727 [2021-12-16 23:00:26,372 INFO L226 Difference]: Without dead ends: 725 [2021-12-16 23:00:26,373 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 [2021-12-16 23:00:26,373 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 [2021-12-16 23:00:26,373 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] [2021-12-16 23:00:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-16 23:00:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 535. [2021-12-16 23:00:26,418 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) [2021-12-16 23:00:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 593 transitions. [2021-12-16 23:00:26,420 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 593 transitions. Word has length 61 [2021-12-16 23:00:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:26,420 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 593 transitions. [2021-12-16 23:00:26,420 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) [2021-12-16 23:00:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 593 transitions. [2021-12-16 23:00:26,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 23:00:26,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:26,422 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] [2021-12-16 23:00:26,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:26,635 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 [2021-12-16 23:00:26,635 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1696675597, now seen corresponding path program 4 times [2021-12-16 23:00:26,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:26,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687612806] [2021-12-16 23:00:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:26,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:26,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687612806] [2021-12-16 23:00:26,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687612806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905722904] [2021-12-16 23:00:26,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:00:26,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:26,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:26,780 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) [2021-12-16 23:00:26,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 23:00:26,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:00:26,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:26,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 23:00:26,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:26,927 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 [2021-12-16 23:00:26,950 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:26,951 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 [2021-12-16 23:00:27,225 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:00:27,225 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 [2021-12-16 23:00:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:27,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:27,352 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 [2021-12-16 23:00:27,354 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 [2021-12-16 23:00:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:27,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905722904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:27,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:27,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2021-12-16 23:00:27,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958512349] [2021-12-16 23:00:27,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:27,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 23:00:27,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 23:00:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-12-16 23:00:27,383 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) [2021-12-16 23:00:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:31,570 INFO L93 Difference]: Finished difference Result 1376 states and 1513 transitions. [2021-12-16 23:00:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2021-12-16 23:00:31,571 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 [2021-12-16 23:00:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:31,573 INFO L225 Difference]: With dead ends: 1376 [2021-12-16 23:00:31,573 INFO L226 Difference]: Without dead ends: 1374 [2021-12-16 23:00:31,578 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 [2021-12-16 23:00:31,579 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 489 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2021-12-16 23:00:31,579 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] [2021-12-16 23:00:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-12-16 23:00:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 430. [2021-12-16 23:00:31,628 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) [2021-12-16 23:00:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 475 transitions. [2021-12-16 23:00:31,629 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 475 transitions. Word has length 61 [2021-12-16 23:00:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:31,630 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 475 transitions. [2021-12-16 23:00:31,630 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) [2021-12-16 23:00:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 475 transitions. [2021-12-16 23:00:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 23:00:31,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:31,631 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] [2021-12-16 23:00:31,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-16 23:00:31,847 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 [2021-12-16 23:00:31,847 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash 873853158, now seen corresponding path program 8 times [2021-12-16 23:00:31,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:31,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6013239] [2021-12-16 23:00:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:31,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:31,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:31,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6013239] [2021-12-16 23:00:31,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6013239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:31,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936873966] [2021-12-16 23:00:31,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:00:31,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:31,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:31,996 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) [2021-12-16 23:00:31,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 23:00:32,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:00:32,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 23:00:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:32,119 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 [2021-12-16 23:00:32,448 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:00:32,449 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 [2021-12-16 23:00:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:32,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:32,613 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 [2021-12-16 23:00:32,615 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 [2021-12-16 23:00:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:32,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936873966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:32,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:32,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2021-12-16 23:00:32,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135519350] [2021-12-16 23:00:32,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:32,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 23:00:32,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:32,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 23:00:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-16 23:00:32,666 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) [2021-12-16 23:00:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:38,680 INFO L93 Difference]: Finished difference Result 1346 states and 1475 transitions. [2021-12-16 23:00:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2021-12-16 23:00:38,681 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 [2021-12-16 23:00:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:38,684 INFO L225 Difference]: With dead ends: 1346 [2021-12-16 23:00:38,684 INFO L226 Difference]: Without dead ends: 1344 [2021-12-16 23:00:38,687 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 [2021-12-16 23:00:38,687 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 478 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 5148 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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 [2021-12-16 23:00:38,687 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] [2021-12-16 23:00:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-12-16 23:00:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 337. [2021-12-16 23:00:38,721 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) [2021-12-16 23:00:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 371 transitions. [2021-12-16 23:00:38,722 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 371 transitions. Word has length 67 [2021-12-16 23:00:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:38,722 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 371 transitions. [2021-12-16 23:00:38,722 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) [2021-12-16 23:00:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 371 transitions. [2021-12-16 23:00:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 23:00:38,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:38,724 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] [2021-12-16 23:00:38,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:38,939 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 [2021-12-16 23:00:38,939 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2143972188, now seen corresponding path program 2 times [2021-12-16 23:00:38,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:38,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888886298] [2021-12-16 23:00:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:38,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:39,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:39,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888886298] [2021-12-16 23:00:39,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888886298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689877317] [2021-12-16 23:00:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:00:39,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:39,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:39,165 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) [2021-12-16 23:00:39,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 23:00:39,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:00:39,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 23:00:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:39,346 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 [2021-12-16 23:00:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:39,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:40,216 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 [2021-12-16 23:00:40,218 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 [2021-12-16 23:00:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 14 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:40,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689877317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:40,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:40,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 40 [2021-12-16 23:00:40,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872698472] [2021-12-16 23:00:40,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:40,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-16 23:00:40,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-16 23:00:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 23:00:40,322 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) [2021-12-16 23:00:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:46,017 INFO L93 Difference]: Finished difference Result 999 states and 1075 transitions. [2021-12-16 23:00:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-12-16 23:00:46,017 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 67 [2021-12-16 23:00:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:46,020 INFO L225 Difference]: With dead ends: 999 [2021-12-16 23:00:46,020 INFO L226 Difference]: Without dead ends: 989 [2021-12-16 23:00:46,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15942 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3475, Invalid=39581, Unknown=0, NotChecked=0, Total=43056 [2021-12-16 23:00:46,024 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1136 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 3633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 23:00:46,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 655 Invalid, 3633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 2787 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-16 23:00:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-12-16 23:00:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 379. [2021-12-16 23:00:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.1005291005291005) internal successors, (416), 378 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:00:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 416 transitions. [2021-12-16 23:00:46,063 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 416 transitions. Word has length 67 [2021-12-16 23:00:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:46,064 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 416 transitions. [2021-12-16 23:00:46,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-12-16 23:00:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 416 transitions. [2021-12-16 23:00:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 23:00:46,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:46,065 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:00:46,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:46,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 23:00:46,279 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash 600772409, now seen corresponding path program 9 times [2021-12-16 23:00:46,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:46,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266100390] [2021-12-16 23:00:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:46,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 157 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:46,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266100390] [2021-12-16 23:00:46,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266100390] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380956109] [2021-12-16 23:00:46,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:00:46,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:46,644 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:00:46,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 23:00:46,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 23:00:46,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 23:00:46,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 200 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:47,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 200 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:47,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380956109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:47,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:47,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 46 [2021-12-16 23:00:47,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965852714] [2021-12-16 23:00:47,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:47,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-16 23:00:47,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-16 23:00:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 23:00:47,806 INFO L87 Difference]: Start difference. First operand 379 states and 416 transitions. Second operand has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:00:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:00:48,166 INFO L93 Difference]: Finished difference Result 770 states and 837 transitions. [2021-12-16 23:00:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 23:00:48,166 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-16 23:00:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:00:48,168 INFO L225 Difference]: With dead ends: 770 [2021-12-16 23:00:48,168 INFO L226 Difference]: Without dead ends: 467 [2021-12-16 23:00:48,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=678, Invalid=2078, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 23:00:48,169 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 441 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:00:48,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 277 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:00:48,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-16 23:00:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 427. [2021-12-16 23:00:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.0892018779342723) internal successors, (464), 426 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:00:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 464 transitions. [2021-12-16 23:00:48,213 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 464 transitions. Word has length 73 [2021-12-16 23:00:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:00:48,214 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 464 transitions. [2021-12-16 23:00:48,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:00:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 464 transitions. [2021-12-16 23:00:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 23:00:48,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:00:48,215 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:00:48,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 23:00:48,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:48,431 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:00:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:00:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash -760676242, now seen corresponding path program 10 times [2021-12-16 23:00:48,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:00:48,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762952915] [2021-12-16 23:00:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:00:48,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:00:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:00:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:48,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:00:48,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762952915] [2021-12-16 23:00:48,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762952915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:00:48,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265989693] [2021-12-16 23:00:48,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:00:48,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:00:48,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:00:48,711 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:00:48,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 23:00:48,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:00:48,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:00:48,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-16 23:00:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:00:48,901 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 [2021-12-16 23:00:48,929 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:48,929 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 [2021-12-16 23:00:48,956 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:00:48,956 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 [2021-12-16 23:00:48,983 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:00:48,984 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 [2021-12-16 23:00:49,360 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 [2021-12-16 23:00:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:49,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:00:49,701 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 [2021-12-16 23:00:49,703 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 [2021-12-16 23:00:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:00:49,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265989693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:00:49,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:00:49,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 43 [2021-12-16 23:00:49,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41764634] [2021-12-16 23:00:49,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:00:49,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-16 23:00:49,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:00:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-16 23:00:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1669, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 23:00:49,772 INFO L87 Difference]: Start difference. First operand 427 states and 464 transitions. Second operand has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 43 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:00,789 INFO L93 Difference]: Finished difference Result 1374 states and 1457 transitions. [2021-12-16 23:01:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-12-16 23:01:00,790 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 43 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 23:01:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:00,792 INFO L225 Difference]: With dead ends: 1374 [2021-12-16 23:01:00,792 INFO L226 Difference]: Without dead ends: 1364 [2021-12-16 23:01:00,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 130 SyntacticMatches, 7 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36281 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=5325, Invalid=87395, Unknown=0, NotChecked=0, Total=92720 [2021-12-16 23:01:00,797 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 677 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 6078 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 6887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 6078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:00,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 1615 Invalid, 6887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 6078 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-16 23:01:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-12-16 23:01:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 445. [2021-12-16 23:01:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.087837837837838) internal successors, (483), 444 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 483 transitions. [2021-12-16 23:01:00,845 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 483 transitions. Word has length 79 [2021-12-16 23:01:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:00,845 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 483 transitions. [2021-12-16 23:01:00,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 43 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 483 transitions. [2021-12-16 23:01:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 23:01:00,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:00,847 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:00,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:01,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:01,063 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:01,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1073875042, now seen corresponding path program 2 times [2021-12-16 23:01:01,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:01,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095162524] [2021-12-16 23:01:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:01,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:01,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095162524] [2021-12-16 23:01:01,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095162524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989220084] [2021-12-16 23:01:01,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:01:01,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:01,300 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:01:01,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 23:01:01,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:01:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 23:01:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:01,457 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 [2021-12-16 23:01:01,472 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:01,472 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 [2021-12-16 23:01:01,487 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:01,488 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 [2021-12-16 23:01:01,501 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:01,502 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 [2021-12-16 23:01:01,888 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:01:01,889 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 [2021-12-16 23:01:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:01,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:02,068 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 [2021-12-16 23:01:02,070 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 [2021-12-16 23:01:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:02,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989220084] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:02,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:02,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2021-12-16 23:01:02,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174287678] [2021-12-16 23:01:02,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:02,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 23:01:02,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:02,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 23:01:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-12-16 23:01:02,114 INFO L87 Difference]: Start difference. First operand 445 states and 483 transitions. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:10,209 INFO L93 Difference]: Finished difference Result 1686 states and 1851 transitions. [2021-12-16 23:01:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2021-12-16 23:01:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 23:01:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:10,213 INFO L225 Difference]: With dead ends: 1686 [2021-12-16 23:01:10,213 INFO L226 Difference]: Without dead ends: 1684 [2021-12-16 23:01:10,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 142 SyntacticMatches, 10 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68858 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=7086, Invalid=144624, Unknown=0, NotChecked=0, Total=151710 [2021-12-16 23:01:10,219 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1044 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 4707 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 5560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 4707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:10,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1044 Valid, 904 Invalid, 5560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 4707 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 23:01:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-12-16 23:01:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 475. [2021-12-16 23:01:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.0886075949367089) internal successors, (516), 474 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 516 transitions. [2021-12-16 23:01:10,261 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 516 transitions. Word has length 79 [2021-12-16 23:01:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:10,262 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 516 transitions. [2021-12-16 23:01:10,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 516 transitions. [2021-12-16 23:01:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 23:01:10,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:10,263 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:10,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:10,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:10,487 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash -538289983, now seen corresponding path program 11 times [2021-12-16 23:01:10,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:10,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923541698] [2021-12-16 23:01:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:10,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:10,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:10,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923541698] [2021-12-16 23:01:10,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923541698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:10,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105509406] [2021-12-16 23:01:10,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:01:10,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:10,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:10,758 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:01:10,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 23:01:11,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-16 23:01:11,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 23:01:11,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:11,059 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 [2021-12-16 23:01:11,114 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:11,114 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 26 treesize of output 25 [2021-12-16 23:01:11,133 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:11,133 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 26 treesize of output 25 [2021-12-16 23:01:11,146 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:11,147 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 26 treesize of output 25 [2021-12-16 23:01:11,161 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:11,161 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 26 treesize of output 25 [2021-12-16 23:01:11,783 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 23:01:11,784 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 37 treesize of output 13 [2021-12-16 23:01:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 102 proven. 161 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 23:01:11,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:14,628 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 73 treesize of output 67 [2021-12-16 23:02:14,634 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 23:02:14,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 905 treesize of output 837 [2021-12-16 23:02:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 102 proven. 161 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 23:02:15,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105509406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:15,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:15,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 20] total 53 [2021-12-16 23:02:15,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799109704] [2021-12-16 23:02:15,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:15,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 23:02:15,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 23:02:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2512, Unknown=31, NotChecked=0, Total=2756 [2021-12-16 23:02:15,166 INFO L87 Difference]: Start difference. First operand 475 states and 516 transitions. Second operand has 53 states, 53 states have (on average 4.0) internal successors, (212), 53 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:19,394 INFO L93 Difference]: Finished difference Result 802 states and 856 transitions. [2021-12-16 23:02:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-16 23:02:19,394 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.0) internal successors, (212), 53 states have internal predecessors, (212), 0 states have call successors, (0), 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 85 [2021-12-16 23:02:19,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:19,396 INFO L225 Difference]: With dead ends: 802 [2021-12-16 23:02:19,396 INFO L226 Difference]: Without dead ends: 786 [2021-12-16 23:02:19,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7076 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=1527, Invalid=22622, Unknown=31, NotChecked=0, Total=24180 [2021-12-16 23:02:19,398 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 467 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 2994 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:19,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 1223 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2994 Invalid, 0 Unknown, 247 Unchecked, 1.3s Time] [2021-12-16 23:02:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-12-16 23:02:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 590. [2021-12-16 23:02:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.0764006791171477) internal successors, (634), 589 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 634 transitions. [2021-12-16 23:02:19,462 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 634 transitions. Word has length 85 [2021-12-16 23:02:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:19,462 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 634 transitions. [2021-12-16 23:02:19,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.0) internal successors, (212), 53 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 634 transitions. [2021-12-16 23:02:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 23:02:19,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:19,464 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:19,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 23:02:19,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:19,688 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -761561989, now seen corresponding path program 5 times [2021-12-16 23:02:19,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:19,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497856155] [2021-12-16 23:02:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:19,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:19,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:19,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497856155] [2021-12-16 23:02:19,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497856155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:19,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104145544] [2021-12-16 23:02:19,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:02:19,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:19,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:19,941 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:02:19,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 23:02:20,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-16 23:02:20,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:02:20,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 23:02:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:20,284 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 [2021-12-16 23:02:20,313 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:02:20,313 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 [2021-12-16 23:02:20,351 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:02:20,351 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 26 treesize of output 25 [2021-12-16 23:02:20,361 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:02:20,361 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 26 treesize of output 25 [2021-12-16 23:02:20,374 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:02:20,374 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 26 treesize of output 25 [2021-12-16 23:02:20,385 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:02:20,385 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 26 treesize of output 25 [2021-12-16 23:02:21,691 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-12-16 23:02:21,691 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 49 treesize of output 16 [2021-12-16 23:02:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 126 proven. 123 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 23:02:21,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:03:40,014 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 121 treesize of output 115 [2021-12-16 23:03:40,029 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 23:03:40,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 103375 treesize of output 101319 Killed by 15