./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.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 d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:46:07,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:46:07,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:46:07,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:46:07,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:46:07,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:46:07,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:46:07,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:46:07,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:46:07,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:46:07,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:46:07,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:46:07,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:46:07,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:46:07,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:46:07,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:46:07,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:46:07,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:46:07,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:46:07,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:46:07,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:46:07,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:46:07,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:46:07,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:46:07,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:46:07,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:46:07,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:46:07,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:46:07,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:46:07,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:46:07,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:46:07,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:46:07,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:46:07,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:46:07,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:46:07,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:46:07,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:46:07,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:46:07,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:46:07,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:46:07,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:46:07,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:46:07,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:46:07,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:46:07,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:46:07,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:46:07,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:46:07,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:46:07,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:46:07,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:46:07,250 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:46:07,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:46:07,251 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:46:07,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:46:07,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:46:07,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:46:07,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:46:07,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:46:07,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:46:07,253 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:46:07,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:46:07,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:46:07,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:46:07,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:46:07,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:46:07,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:46:07,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:46:07,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:46:07,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:46:07,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:46:07,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:46:07,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:46:07,255 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:46:07,255 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:46:07,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:46:07,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:46:07,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2021-12-15 08:46:07,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:46:07,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:46:07,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:46:07,526 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:46:07,527 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:46:07,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2021-12-15 08:46:07,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cced9d756/cc5b4263048f4b68a60167c411d2e664/FLAG8fa1913bd [2021-12-15 08:46:07,916 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:46:07,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2021-12-15 08:46:07,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cced9d756/cc5b4263048f4b68a60167c411d2e664/FLAG8fa1913bd [2021-12-15 08:46:07,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cced9d756/cc5b4263048f4b68a60167c411d2e664 [2021-12-15 08:46:07,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:46:07,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:46:07,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:46:07,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:46:07,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:46:07,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:46:07" (1/1) ... [2021-12-15 08:46:07,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489b083c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:07, skipping insertion in model container [2021-12-15 08:46:07,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:46:07" (1/1) ... [2021-12-15 08:46:07,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:46:07,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:46:08,077 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-cav19/array_init_var_plus_ind3.c[415,428] [2021-12-15 08:46:08,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:46:08,103 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:46:08,118 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-cav19/array_init_var_plus_ind3.c[415,428] [2021-12-15 08:46:08,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:46:08,137 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:46:08,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08 WrapperNode [2021-12-15 08:46:08,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:46:08,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:46:08,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:46:08,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:46:08,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,167 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2021-12-15 08:46:08,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:46:08,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:46:08,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:46:08,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:46:08,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:46:08,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:46:08,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:46:08,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:46:08,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (1/1) ... [2021-12-15 08:46:08,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:46:08,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:46:08,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:46:08,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:46:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:46:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:46:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:46:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:46:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:46:08,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:46:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:46:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:46:08,331 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:46:08,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:46:08,405 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:46:08,410 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:46:08,410 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 08:46:08,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:46:08 BoogieIcfgContainer [2021-12-15 08:46:08,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:46:08,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:46:08,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:46:08,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:46:08,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:46:07" (1/3) ... [2021-12-15 08:46:08,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b44b3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:46:08, skipping insertion in model container [2021-12-15 08:46:08,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:46:08" (2/3) ... [2021-12-15 08:46:08,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b44b3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:46:08, skipping insertion in model container [2021-12-15 08:46:08,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:46:08" (3/3) ... [2021-12-15 08:46:08,418 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2021-12-15 08:46:08,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:46:08,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:46:08,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:46:08,467 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:46:08,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:46:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 08:46:08,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:08,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:08,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:08,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-12-15 08:46:08,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:08,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859740213] [2021-12-15 08:46:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:08,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:08,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:08,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859740213] [2021-12-15 08:46:08,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859740213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:46:08,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:46:08,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:46:08,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275875643] [2021-12-15 08:46:08,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:46:08,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:46:08,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:08,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:46:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:46:08,751 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:08,766 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-12-15 08:46:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:46:08,768 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 08:46:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:08,774 INFO L225 Difference]: With dead ends: 27 [2021-12-15 08:46:08,774 INFO L226 Difference]: Without dead ends: 12 [2021-12-15 08:46:08,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:46:08,781 INFO L933 BasicCegarLoop]: 18 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, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:08,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:46:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-15 08:46:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-15 08:46:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-15 08:46:08,813 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-12-15 08:46:08,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:08,813 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-15 08:46:08,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-15 08:46:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 08:46:08,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:08,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:08,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:46:08,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:08,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-12-15 08:46:08,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:08,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689891304] [2021-12-15 08:46:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:08,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:08,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689891304] [2021-12-15 08:46:08,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689891304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:46:08,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:46:08,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:46:08,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564238052] [2021-12-15 08:46:08,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:46:08,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:46:08,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:46:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:46:08,921 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:08,953 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-15 08:46:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:46:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 08:46:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:08,954 INFO L225 Difference]: With dead ends: 29 [2021-12-15 08:46:08,954 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 08:46:08,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:46:08,956 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:08,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:46:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 08:46:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2021-12-15 08:46:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-15 08:46:08,963 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-12-15 08:46:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:08,964 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-15 08:46:08,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-15 08:46:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 08:46:08,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:08,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:08,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:46:08,969 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2021-12-15 08:46:08,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:08,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677612160] [2021-12-15 08:46:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:08,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:09,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:09,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677612160] [2021-12-15 08:46:09,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677612160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:46:09,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:46:09,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:46:09,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895250869] [2021-12-15 08:46:09,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:46:09,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:46:09,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:46:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:46:09,035 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:09,059 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-15 08:46:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:46:09,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-15 08:46:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:09,061 INFO L225 Difference]: With dead ends: 23 [2021-12-15 08:46:09,061 INFO L226 Difference]: Without dead ends: 15 [2021-12-15 08:46:09,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:46:09,067 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:09,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:46:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-15 08:46:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-15 08:46:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-15 08:46:09,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-15 08:46:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:09,074 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-15 08:46:09,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-15 08:46:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 08:46:09,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:09,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:09,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:46:09,075 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:09,075 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2021-12-15 08:46:09,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:09,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154706940] [2021-12-15 08:46:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:09,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:09,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:09,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154706940] [2021-12-15 08:46:09,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154706940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:46:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299603520] [2021-12-15 08:46:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:09,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:09,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:46:09,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:46:09,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:46:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:46:09,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:46:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:09,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:46:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:09,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299603520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:46:09,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:46:09,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-15 08:46:09,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447107442] [2021-12-15 08:46:09,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:46:09,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:46:09,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:46:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:46:09,449 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:09,538 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-15 08:46:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 08:46:09,539 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 08:46:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:09,540 INFO L225 Difference]: With dead ends: 45 [2021-12-15 08:46:09,540 INFO L226 Difference]: Without dead ends: 36 [2021-12-15 08:46:09,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-12-15 08:46:09,541 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:09,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:46:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-15 08:46:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-12-15 08:46:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-15 08:46:09,546 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2021-12-15 08:46:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:09,546 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-15 08:46:09,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-15 08:46:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 08:46:09,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:09,547 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:09,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:46:09,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:09,770 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2021-12-15 08:46:09,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:09,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678036830] [2021-12-15 08:46:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:09,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:09,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678036830] [2021-12-15 08:46:09,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678036830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:46:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693563079] [2021-12-15 08:46:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:09,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:09,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:46:09,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:46:09,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:46:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 08:46:09,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:46:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:09,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:46:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:09,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693563079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:46:09,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:46:09,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-15 08:46:09,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351286227] [2021-12-15 08:46:09,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:46:09,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:46:09,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:46:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:46:09,972 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:10,017 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-15 08:46:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 08:46:10,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 14 [2021-12-15 08:46:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:10,018 INFO L225 Difference]: With dead ends: 39 [2021-12-15 08:46:10,018 INFO L226 Difference]: Without dead ends: 27 [2021-12-15 08:46:10,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:46:10,019 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:10,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:46:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-15 08:46:10,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-12-15 08:46:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-12-15 08:46:10,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2021-12-15 08:46:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:10,024 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-12-15 08:46:10,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-12-15 08:46:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 08:46:10,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:10,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:10,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:46:10,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:10,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:10,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1859381769, now seen corresponding path program 2 times [2021-12-15 08:46:10,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:10,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328665492] [2021-12-15 08:46:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:10,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:10,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328665492] [2021-12-15 08:46:10,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328665492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:46:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545784395] [2021-12-15 08:46:10,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:46:10,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:46:10,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:46:10,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:46:10,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:46:10,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:46:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:46:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:46:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:10,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:46:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:10,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545784395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:46:10,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:46:10,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2021-12-15 08:46:10,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220313630] [2021-12-15 08:46:10,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:46:10,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 08:46:10,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 08:46:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=263, Unknown=0, NotChecked=0, Total=462 [2021-12-15 08:46:10,708 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:10,876 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-12-15 08:46:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 08:46:10,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) Word has length 22 [2021-12-15 08:46:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:10,878 INFO L225 Difference]: With dead ends: 102 [2021-12-15 08:46:10,878 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 08:46:10,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=455, Unknown=0, NotChecked=0, Total=756 [2021-12-15 08:46:10,879 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 320 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:10,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 77 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:46:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 08:46:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2021-12-15 08:46:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-15 08:46:10,886 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 22 [2021-12-15 08:46:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:10,886 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-15 08:46:10,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-15 08:46:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 08:46:10,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:10,887 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:10,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:46:11,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:11,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1855888886, now seen corresponding path program 2 times [2021-12-15 08:46:11,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181355490] [2021-12-15 08:46:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:11,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:11,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:11,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181355490] [2021-12-15 08:46:11,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181355490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:46:11,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674625009] [2021-12-15 08:46:11,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:46:11,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:11,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:46:11,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:46:11,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:46:11,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:46:11,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:46:11,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-15 08:46:11,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:46:11,567 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 15 treesize of output 11 [2021-12-15 08:46:11,658 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 21 treesize of output 9 [2021-12-15 08:46:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:11,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:46:11,754 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 16 treesize of output 14 [2021-12-15 08:46:11,758 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 32 treesize of output 28 [2021-12-15 08:46:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:12,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674625009] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:46:12,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:46:12,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2021-12-15 08:46:12,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081004991] [2021-12-15 08:46:12,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:46:12,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 08:46:12,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 08:46:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-12-15 08:46:12,034 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:12,230 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-12-15 08:46:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 08:46:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 08:46:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:12,235 INFO L225 Difference]: With dead ends: 61 [2021-12-15 08:46:12,235 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 08:46:12,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-12-15 08:46:12,236 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:12,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 106 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:46:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 08:46:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2021-12-15 08:46:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-15 08:46:12,249 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 23 [2021-12-15 08:46:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:12,250 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-15 08:46:12,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-15 08:46:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 08:46:12,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:12,251 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:12,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:46:12,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:12,464 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash -954451792, now seen corresponding path program 3 times [2021-12-15 08:46:12,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:12,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389096104] [2021-12-15 08:46:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:12,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:12,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:12,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389096104] [2021-12-15 08:46:12,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389096104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:46:12,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968483954] [2021-12-15 08:46:12,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:46:12,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:12,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:46:12,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:46:12,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:46:12,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 08:46:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:46:12,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 08:46:12,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:46:12,915 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 15 treesize of output 11 [2021-12-15 08:46:12,985 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 08:46:12,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:46:13,053 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 21 treesize of output 9 [2021-12-15 08:46:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:13,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:46:43,259 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 23 treesize of output 21 [2021-12-15 08:46:43,263 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 82 treesize of output 78 [2021-12-15 08:46:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:43,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968483954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:46:43,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:46:43,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2021-12-15 08:46:43,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901164750] [2021-12-15 08:46:43,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:46:43,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 08:46:43,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 08:46:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=814, Unknown=15, NotChecked=0, Total=930 [2021-12-15 08:46:43,593 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:45,764 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-12-15 08:46:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 08:46:45,765 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-15 08:46:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:45,766 INFO L225 Difference]: With dead ends: 58 [2021-12-15 08:46:45,766 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 08:46:45,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=120, Invalid=920, Unknown=16, NotChecked=0, Total=1056 [2021-12-15 08:46:45,767 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:45,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 126 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 278 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-15 08:46:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 08:46:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-12-15 08:46:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-15 08:46:45,773 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2021-12-15 08:46:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:45,773 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-15 08:46:45,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-15 08:46:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:46:45,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:45,775 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:45,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:46:45,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:45,997 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:45,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 1 times [2021-12-15 08:46:45,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:45,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068533607] [2021-12-15 08:46:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:45,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:46,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:46,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068533607] [2021-12-15 08:46:46,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068533607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:46:46,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287684554] [2021-12-15 08:46:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:46,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:46:46,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:46:46,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:46:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:46,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 08:46:46,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:46:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:46,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:46:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:46,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287684554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:46:46,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:46:46,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2021-12-15 08:46:46,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521138519] [2021-12-15 08:46:46,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:46:46,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 08:46:46,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:46:46,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 08:46:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:46:46,266 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:46:46,311 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-12-15 08:46:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 08:46:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 08:46:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:46:46,313 INFO L225 Difference]: With dead ends: 61 [2021-12-15 08:46:46,313 INFO L226 Difference]: Without dead ends: 49 [2021-12-15 08:46:46,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:46:46,316 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:46:46,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:46:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-15 08:46:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-15 08:46:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-15 08:46:46,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 27 [2021-12-15 08:46:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:46:46,332 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-15 08:46:46,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:46:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-15 08:46:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 08:46:46,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:46:46,333 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:46:46,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:46:46,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:46,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:46:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:46:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2016089162, now seen corresponding path program 4 times [2021-12-15 08:46:46,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:46:46,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002436992] [2021-12-15 08:46:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:46:46,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:46:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:46:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:46,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:46:46,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002436992] [2021-12-15 08:46:46,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002436992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:46:46,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587789141] [2021-12-15 08:46:46,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:46:46,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:46:46,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:46:46,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:46:46,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:46:46,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:46:46,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:46:46,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 08:46:46,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:46:47,030 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 15 treesize of output 11 [2021-12-15 08:46:47,074 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 08:46:47,075 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 27 treesize of output 26 [2021-12-15 08:46:47,109 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 08:46:47,110 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 27 treesize of output 26 [2021-12-15 08:46:47,152 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 21 treesize of output 9 [2021-12-15 08:46:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:46:47,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:47:26,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_71| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_71| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_169 Int) (v_ArrVal_168 Int) (|v_ULTIMATE.start_main_~i~0#1_70| Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4)) v_ArrVal_168) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_70| 4)) v_ArrVal_169) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)) 0) (< |v_ULTIMATE.start_main_~i~0#1_70| (+ |v_ULTIMATE.start_main_~i~0#1_71| 1)))))) is different from false [2021-12-15 08:47:26,678 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 30 treesize of output 28 [2021-12-15 08:47:26,683 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 182 treesize of output 178 [2021-12-15 08:47:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-15 08:47:27,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587789141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:47:27,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:47:27,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2021-12-15 08:47:27,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684355793] [2021-12-15 08:47:27,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:47:27,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 08:47:27,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:47:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 08:47:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=912, Unknown=31, NotChecked=62, Total=1122 [2021-12-15 08:47:27,072 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 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)